CN105314952A - Load-bearing and heat-insulation concrete taking ettringite colloid as template agent and preparation method for load-bearing and heat-insulation concrete - Google Patents
Load-bearing and heat-insulation concrete taking ettringite colloid as template agent and preparation method for load-bearing and heat-insulation concrete Download PDFInfo
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- CN105314952A CN105314952A CN201410365271.7A CN201410365271A CN105314952A CN 105314952 A CN105314952 A CN 105314952A CN 201410365271 A CN201410365271 A CN 201410365271A CN 105314952 A CN105314952 A CN 105314952A
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- 229910001653 ettringite Inorganic materials 0.000 title claims description 101
- 239000004567 concrete Substances 0.000 title claims description 96
- 239000000084 colloidal system Substances 0.000 title claims description 75
- 238000002360 preparation method Methods 0.000 title claims description 25
- 238000009413 insulation Methods 0.000 title description 19
- 239000000463 material Substances 0.000 claims description 68
- 239000004568 cement Substances 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 28
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 25
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 24
- 239000004571 lime Substances 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000010440 gypsum Substances 0.000 claims description 16
- 229910052602 gypsum Inorganic materials 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000000292 calcium oxide Substances 0.000 claims description 14
- 235000012255 calcium oxide Nutrition 0.000 claims description 14
- 239000011449 brick Substances 0.000 claims description 13
- 239000002956 ash Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 12
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- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 9
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- 239000012634 fragment Substances 0.000 claims description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004113 Sepiolite Substances 0.000 claims description 3
- 229920004935 Trevira® Polymers 0.000 claims description 3
- 229910052599 brucite Inorganic materials 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
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- 238000005086 pumping Methods 0.000 claims description 3
- 229910052624 sepiolite Inorganic materials 0.000 claims description 3
- 235000019355 sepiolite Nutrition 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 239000010455 vermiculite Substances 0.000 claims description 3
- 229910052902 vermiculite Inorganic materials 0.000 claims description 3
- 235000019354 vermiculite Nutrition 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 229940089401 xylon Drugs 0.000 claims description 2
- 238000000034 method Methods 0.000 description 24
- 239000006260 foam Substances 0.000 description 14
- 229940037003 alum Drugs 0.000 description 13
- 239000002245 particle Substances 0.000 description 13
- 239000011162 core material Substances 0.000 description 12
- 239000002131 composite material Substances 0.000 description 11
- 239000011381 foam concrete Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
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- 230000002522 swelling effect Effects 0.000 description 3
- 241000397426 Centroberyx lineatus Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000011438 cord wood Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004620 low density foam Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011470 perforated brick Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to load-bearing and heat-insulation concrete and a preparation method for the load-bearing and heat-insulation concrete and particularly relates to novel concrete, which has a uniform micropore structure and simultaneously has load-bearing capacity and a heat insulation function, prepared through forming an aqueous-phase uniform three-dimensional-network micropore structure by taking ettringite colloid as a template agent and adding a cementing glue material, fine aggregates, coarse aggregates, additives and admixtures. The load-bearing and heat-insulation concrete disclosed by the invention has the characteristics of light weight, high strength and low coefficient of thermal conductivity, can be used for preforming bricks, building blocks and sheet materials or components such as assembly-type stairs, wallboards, floor slabs, balcony slabs and roof panels in plant, can also be subjected to cast-in-place at a construction field site and is compatible with an aerated concrete production process, a foamed concrete production process and an ordinary concrete preforming production process at present, so that the transformation and upgrading of the traditional concrete industries are facilitated, and the load-bearing and heat-insulation concrete has remarkable practical significance in promoting the industrialization of Chinese residence and the development of environment-friendly building concrete materials.
Description
Technical field
The present invention relates to a kind of load bearing heat preserving concrete and preparation method thereof, in particular to ettringite colloid for template, form the uniform three-dimensional network microvoid structure of aqueous phase, by adding gelling material, fine aggregate, coarse aggregate, adulterant and admixture, prepare a kind of new concrete simultaneously possessing weight capacity and heat insulation function.Load bearing heat preserving concrete of the present invention has the feature of lightweight, high-strength, low thermal conductivity, the parts such as fragment of brick, building block and sheet material or assembled stair, wallboard, floor, balcony slab, roof boarding can be prefabricated in the factory into, also can be cast-in-place at the construction field (site), there is significant realistic meaning to the development promoting China's housing industrialization and green building concrete material.
Background technology
Along with housing industrialization and green building and developing rapidly at home, new requirement is proposed to high performance novel wall material, particularly particularly urgent to the demand of the load bearing heat preserving integration product possessing weight capacity and good thermal insulation property simultaneously.
Clear stipulaties in standard GB/T 50368-2005 " norm of residential housing ", housing structure should lower than C20 with concrete strength grade; In housing structure, the intensity of bearing masonry material should meet the following requirements: the strength grade of fired common brick, sintered perforated brick, autoclaved lime-sand brick, autoclaved fly ash brick should lower than MU10, and the strength grade of concrete segment should lower than MU7.5.
On the other hand, the existing wall heat insulation material of existing market, gas concrete, foamed concrete equal strength are generally lower than MU7.5, and most foamed concrete, thermal insulation mortar, rock cotton board, pearlite slab, polystyrene board, polyurethane foam, resol plate equal strength are general lower than 0.5MPa especially.
For solving the conspicuous contradiction between load larrying member and heat insulation function, researchist have employed following technical scheme.
1) conventional concrete or steel construction is coated or the sandwich composite structure of fill insulant material.This is that current researchist takes maximum technical schemes.Patent CN201210537679.9, disclose a kind of heat-preserving load-bearing composite light building board, comprise light steel skeleton, light foam concrete, web member, web member is connected with vertical steel keel, and integrated poured around light steel skeleton have light foaming concrete.Patent CN02159997.1 discloses a kind of foam cement composition board and method for manufacturing thereof, forms primarily of main frame, foam cement core, Steel Truss and surface layer; Foam cement composition board is sandwich layer with foam cement, it has the surface layer strengthened by anticracking material, is provided with the main frame that shaped steel or concrete are formed, is provided with the Steel Truss be connected with main frame in foam cement sandwich layer in plate periphery or plate.Patent CN201220496538.2 discloses a kind of energy-saving heat preserving Side fascia, is followed successively by bearing stratum, thermal insulation layer, anti-impacting layer, decoration formation from inside to outside.Patent CN201320487894.2 discloses a kind of foam ceramsite concrete composition board making bearing wall, and comprise fibrocement plate structure and foam ceramsite concrete Rotating fields, foam ceramsite concrete Rotating fields is sandwiched between two fiber cement boards.Patent CN201310480236.5 discloses a kind of composite self-heat-insulation concrete building block, and by core material and core material surrounding is carried out coated light aggregate concrete building block form, core material is thermal insulation layer, and light aggregate concrete building block is bearing stratum.Patent CN200810064769.4 discloses a kind of energy-conserving construction bearing wall composite board, comprise the shaping volume lagging material of mold and make module core, be combined into straight plate by building module cord wood after assembling with corresponding steel construction and the material of construction such as dihedral module board core and fibrous magnesium silicate cement plate is combined into composite heat-preserving load-bearing wallboard.Patent CN200820174390.4 discloses a kind of foam concrete composite board and comprises foamed concrete core, and be provided with steel or the secondary muscle of concrete in the middle of core, the periphery of core is various shaped steel or concrete frame, and the end face of framework and core is surface layer.Patent CN201310284009.5 discloses a kind of overall load bearing heat preserving wallboard and produces construction process, two surface layers are concrete, concrete surface has glass fiber mesh, inside there is reinforcing mat, middle layer is foam cement, and reinforcing bar connects the reinforcing mat in two surface layers through foam cement, and surrounding end face is fluted, have embedded bar connecting joint, two erection opening are arranged at top.In addition patent CN201120049678.0 composite light-weight high-strength self-heat-conserving building block, CN201320219267.0 multilayer parallel wire net frames core heated board and load bearing heat preserving integration wall body structure, CN200610092167.0 self-insulating concrete house structural system, CN200710171204.1 self-conserving heat green concrete assembled large panel and preparation method thereof, CN200910099504.2 structure self-heat-insulation concrete wall plate and preparation method thereof, CN201110215837.4 self-insulation composite concrete self-supporting building block, CN201110364481.0 Self-heat-insulating concrete building block and patent CN201120399380.2 round more than a kind also take the technical scheme of the type without cold-heat bridge load-bearing insulation block.
2) light skeletal and lagging material is added in conventional concrete preparation process.Patent CN200610012726.2 discloses a kind of heat-insulated concrete of kervit micro-beads, and its component is glass bead, cement, sand, stone, water, extra material.Patent CN201210102704.0 discloses a kind of heat-preserving load-bearing regeneration concrete, and the component of employing is composite light-weight bone spike, cement, recycled fine aggregate, sand, regenerated coarse aggregate, stone, haydite, flyash, water, admixture; Described composite light-weight bone spike is the mixture of glass bead and aerogel.Patent CN200710300076.6 discloses a kind of concrete bearing insulating brick with float stone, cement and swelling agent and gypsum for main raw material, through mixing, stir, the concrete bearing insulating brick of extrusion molding.Patent CN201110270949.X discloses self-insulating brick, heat insulation building block and production technique thereof; relating to a kind of cement based jelling agent is base material; take calcium silicate powder as main thermal insulation materials, the self-insulating brick also can prepare with one or several compound of vermiculite, diatomite, glass bead, produced or heat insulation building block.Patent CN201110084478.3 discloses the making method of a kind of waste fiber fiber heat-insulating bearing concrete building block, and lagging material is combined with waste fiber concrete segment, provides a kind of new type block of heat insulation building block.Patent CN201110222693.5 discloses a kind of light granules and fibrous concrete series self-thermal insulation material, airtight for the lightweight staple fibre refusing particle water and thin dawn is introduced concrete, efficiently solves that the building material such as gas concrete and foamed concrete water-intake rate is high, intensity is low, problems of crack.Patent CN201310557850.7 discloses a kind of self-insulating concrete, its formula consist of activating and regenerating concrete powder, slag, exciting agent, thin light-weight aggregate, thick light-weight aggregate, aluminium slag.
3) enhancement type foam or gas concrete.Patent CN201110419707.2 discloses a kind of gangue foam concrete building block for wall self-insulation, is made up of high strength gangue foam concrete shell and ultra-low-density foam concrete core.Patent CN201110354321.8 discloses a kind of foamed concrete, and main ingredient has cement, fine sand, whipping agent, compensator, and unit weight is 500 ~ 1200kg/m3.Patent CN201210388664.0 discloses one and adds sand self-heat conserving foamed concrete, material of its composition by quartz sand, cement, silicon ash, fiber, admixture, hydrogen peroxide, water and glue.Patent CN201010620953.X discloses a kind of method manufacturing ceramsite self-heat-insulation air-entrapping building block, raw materials used is haydite, Tao Fen, cement, flyash, infusion foam overrun, water, and above-mentioned mixing of materials enters in mixer chamber carries out maintenance, the demoulding, cutting after stirring, vibratory compaction.
4) conventional concrete hollow structure inside.Patent CN200520001776.1 discloses a kind of multi-functional bearing building block, and in cubic, there are two to three holes at center, and its outside surface layer has the swallow-tail form tongue and groove of vertical distribution, the cell wall of swallow-tail form tongue and groove and the angle of bottom land are 30-90 degree.
Open and the application of above patent, the favourable development facilitating China's load bearing heat preserving materials for wall, but still there are some problems.1) conventional concrete or steel construction is coated or the sandwich composite structure of fill insulant material.Need at least a kind of lagging material of the high-strength material and a kind of low thermal conductivity that possess weight capacity to be combined, because bi-material nature difference is huge, combined process is more complicated often, be unfavorable for the control of quality, in use may occur being separated the phenomenon come off, also often thickness is comparatively large for gained finished product, takies more space.2) light skeletal and lagging material is added in conventional concrete preparation process.Can be obtained by the kind and ratio controlling light skeletal and lagging material within the specific limits and need intensity, density and thermal conductivity, in actually operating, light skeletal and lagging material and unclassified stores density difference larger, mixed uniformly entirety should not be formed, thus cause the density of interiors of products, intensity, thermal conductivity to occur skewness, product concentrates the quality problems such as appearance cracking because of internal stress, affects weight capacity and heat insulation effect in application process.3) enhancement type foam or gas concrete.Existing method can promote original concrete strength to a certain extent, but limited extent, be difficult to the product obtaining more than intensity 10MPa, self be also difficult to the requirement reaching energy-conservation 65% simultaneously.4) conventional concrete hollow structure inside.This method is generally used for making bearing building block, and heat insulation effect is still not good enough.
For overcoming the above problems, the present invention proposes a kind of new load bearing heat preserving concrete and preparation method thereof.
Summary of the invention
For solving the deficiency that traditional load bearing heat preserving concrete exists, the present invention proposes a kind of take ettringite as load bearing heat preserving concrete of template and preparation method thereof, and it comprises the following steps.
(1) ettringite colloid is prepared.
Described ettringite colloid, is generated by Tai-Ace S 150 and lime reaction or is reacted by calcium aluminate and gypsum and generate or mixed by ettringite powder and water, is preferably generated by Tai-Ace S 150 and lime reaction.
Described ettringite colloid, when being generated by Tai-Ace S 150 and lime reaction, first that Tai-Ace S 150 is water-soluble, then under agitation mix with liming, generate the ettringite colloid of thickness.
Described ettringite colloid, when being generated by Tai-Ace S 150 and lime reaction, first that Tai-Ace S 150 is water-soluble, Tai-Ace S 150 and quality mark are 1 ~ 50:100; Liming is mixed with water by unslaked lime or white lime, and preferred unslaked lime mixes with water, and the massfraction of unslaked lime and water is 1 ~ 100:100.
Described ettringite colloid is viscous fluid, and pH value is 5 ~ 12, preferably 6 ~ 10, particularly preferably 6.5 ~ 9.
(2) take gelling material, coarse aggregate, fine aggregate, adulterant in proportion, stir, obtained premix siccative;
The massfraction of described premix siccative composition is than being gelling material: coarse aggregate: fine aggregate: adulterant=1 ~ 30:2 ~ 90::1 ~ 400.1 ~ 5.
Described gelling material comprises one or more of cement, lime and gypsum.Described cement comprises silicate cement, aluminate cement, aluminosulfate cement, ferro-aluminate cement, and the complex cement that above cement fusion slag, flyash, volcanic ash and gypsum are formed.
Described fine aggregate comprises one or more in fine sand, glass bead, pearlstone.
Described coarse aggregate comprises one or more in rubble, cobble, leca, haydites of book structure, lytag, float stone, volcanic cinder.
Described adulterant comprises one or more in flyash, blast-furnace slag, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon powder, diatomite, wilkinite, attapulgite clay, rice hull ash.
(3) ettringite colloid and fiber, admixture are mixed, obtained premix wet feed.
Described premix wet feed, its quality of material mark ratio is: ettringite colloid: fiber: admixture=10 ~ 1000:0.1 ~ 1:0.01 ~ 10.
Described fiber reinforced material comprises one or more in glass fibre, trevira, polypropylene fibre, xylon, cellulosic fibre, sepiolite fibre, brucite fiber.
Described admixture comprises one or more in water reducer, economization agent, water-resisting agent, thickening material, pumping agent, hardening accelerator, retardant.
(4) by premix siccative and the mixing of premix wet feed, inject mould after stirring and obtain formation of concrete, maintenance.
Described premix siccative and the mixing of premix wet feed, its quality of material mark ratio is, premix siccative: premix wet feed=1 ~ 100:1 ~ 100, preferably 1 ~ 0:1 ~ 10.
Described injection mould molding, obtains product and comprises fragment of brick, building block, sheet material and assembled body of wall parts, simultaneously can also be cast-in-place shaping at the construction field (site).
Described formation of concrete maintenance comprises natural curing, vapor cure, curing in water, overlay film maintenance.
First introducing ettringite colloid is that template prepares the concrete mechanism of load bearing heat preserving.
Template is structure directing agent again, plays stay in place form effect in containing Microporous Compounds generative process, the generation of induction special construction, extensively adopts organic amine and quaternary ammonium ion as template in the preparation process of zeolite molecular sieve.
Ettringite, has another name called crystallisate hydrated calcium aluminate sulfate, and be a kind of colourless to yellow mineral crystal, its chemical molecular is: 3CaOAl
2o
33CaSO
432H
2o, wherein the quantity of crystal water is relevant with the temperature and humidity of residing environment.
There is the natural mineral of ettringite in occurring in nature, the attention of researchist is but caused to be that it finds in the hydrated product of cement, to be combined with sulfate ion by C-A in cement hydration process-H gel (drated calcium aluminate) and to produce crystallisate hydrated calcium aluminate sulfate (being called for short AFt), chemical constitution and the crystalline structure of AFt and natural mineral ettringite are substantially identical, and there is certain swelling property, significantly can promote early age strength of concrete and resisted shrinkage index, be usually used to configuration short-term strength cement or expansive concrete.
Can relatively easily obtain ettringite material by chemical reaction, its reaction principle is as follows:
Al
2(SO
4)·18H
2O+6Ca(OH)
2 3CaO·Al2O
3·3CaSO
4·32H
2O
Ettringite can also be obtained by following principle:
CaO·Al2O
3+2CaO+3CaSO
4·2H
2O+30H
2O
3C
3A·3CaSO
4·32H
2O
Under agitation, above-mentioned reaction generates ettringite and grows up, become finely ground particles, because the ettringite in the aqueous solution has nearly 32 crystal water, thus make the ettringite molecule even suspension generated in aqueous phase, become a kind of caeseous thick gel material.If depending on ettringite for observing main body, then can think that ettringite particle agglomeration is piled into loose three-dimensional net structure, inside configuration is filled with moisture.Test shows, ettringite colloid has good stability, can reach the several months not to be deposited on bottom, and recrystallization or crosslinked and become gel also can not occur, and also have certain thixotropy, standing ettringite viscosity after stirring can return to initial level simultaneously.
In fact also can be understood as ettringite colloid is thick colloid between colloidal sol and gel.The ultimate particle of colloid is 1 ~ 100nm, and be combined with each other between ultimate particle the nanoporous skeleton being formed and have three-dimensional net structure, so ettringite colloid is the toughness material still under shearing force with nano-porous structure.
When bonding agent and other materials mix with ettringite colloid, due to colloid toughness and the property sheared, bonding agent and other materials can be evenly dispersed in colloid, until progressively harden thus possessed the original nano-porous structure of ettringite colloid.The template effect that in the present invention that Here it is, ettringite colloid plays.
Simply conclude, we can find that ettringite has following very unique excellent properties.
1) early strength of cement can be improved.
2) there is the contraction that swelling property can be avoided in hardening of cement process.
3) there is good colloidal property, stable thickness aqueous phase colloidalmaterial can be formed.
4) very high consistency is had as the hydrated product of cement self and cement.
5) compare organic template nontoxic, and do not need the later stage to remove.
Just based on above characteristic, ettringite colloid is chosen as the concrete template of load bearing heat preserving of the present invention.Describe in detail below, the effect that ettringite colloid plays in load bearing heat preserving concrete.
We know, the particle diameter major part of cement is distributed in 3 ~ 45 μm, and will form colloid and generally need below 100nm, and Here it is why when the water cement ratio of cement is higher, and most of cement granules can not suspend in water, but directly sinks to bottom.In other words, we are not by adding water to obtain more low-density concrete product.Can not low density be realized, just cannot realize allowing concrete possess good heat-insulating property.
As previously mentioned, current existing acquisition light weight concrete way mainly adopts foaming technique, aerating technology and introduces low-density material.But above way, decline to a great extent as cost with concrete strength, even cannot use as bearing wall material, requirement of strength meets, heat-insulating property does not reach requirement again, or intensity and heat-insulating property all reach and require that, but fire resistance and endurance quality do not reach requirement again, in a word, the dilemma that fish and bear's paw can not get both substantially is in.
But, if we add cement isocolloid material in ettringite colloid, no matter the ratio of cement is how many, all there will not be the phenomenon that cement sinks to the bottom or reunites, cement and other materials added can be evenly dispersed in whole ettringite colloid simultaneously, and form the concrete material in a large number with similar ettringite colloid microvoid structure by the hydration reaction occurred in ettringite colloid.We see that ettringite colloid is in the load bearing heat preserving concrete of cement cementitious material thus, serve the effect of very good template.
When gelling material be lime or gypsum time, ettringite colloid can make lime, gypsum and unclassified stores therein dispersed equally, when the siliceous material generation hydration reaction in lime and gypsum and material forms rigid porous structures, ettringite colloid serves the effect of good template equally.
The aqueous phase of ettringite colloid inside not only can promote the aquation of cement, the effect of cement curing in water can also be reached simultaneously, ettringite colloid can facilitate the generation of ettringite in cement hydration process as crystal seed, improve hydrated cementitious intensity, shorten demould time, the swelling property of ettringite also can be offset concrete hole internal moisture and evaporate the shrinking effect caused.
React violent with silicon sol and cement, even there will be wink solidifying different, the reaction of the gelling material such as ettringite colloid and cement is comparatively gentle, there will not be the situation of rapid coagulation, ettringite colloid is final in addition and gelling material hydrated product reacts to each other is cross-linked becomes single entirety, instead of overlayed in cement structures by simple physical package, this is also that technical solution of the present invention can significantly reduce while concrete density obtains good heat-insulating property, can have again the major reason that higher-strength realizes load bearing heat preserving.
The key control point of technical solution of the present invention enforcement and the technical characterstic of scheme are described in detail in detail below.
The described ettringite colloid of step (1), can be generated by Tai-Ace S 150 and lime reaction or be reacted by calcium aluminate and gypsum and generate or mixed by ettringite powder and water.Wherein calcium aluminate and gypsum react in the mode generated, and calcium aluminate and gypsum are all water insoluble, and both hydration reaction processes are comparatively slow, are not easy to obtain tiny ettringite particle, form ettringite colloid quality wayward; Ettringite powder and water mixture manufacturing ettringite colloid, require that ettringite powder has superfine granularity, obtains ettringite colloid and the ettringite of larger particles may be also had to affect the stability of colloid.And the mode of Tai-Ace S 150 and lime reaction, Tai-Ace S 150 can be dissolved in the water completely, unslaked lime solution water also can obtain minimum particle diameter by stirring, and is to obtain the ettringite compared with small particle size when Tai-Ace S 150 and lime under agitation mix, and then forms the ettringite colloid of high-quality.So preferably sulfuric acid aluminium and lime reaction generate ettringite colloid.In like manner, described lime, preferred unslaked lime.
When Tai-Ace S 150 and lime reaction generate, the concentration of alum liquor and liming is lower, stirring velocity is faster, it is also less that the two reaction generates ettringite particle diameter, if the concentration of alum liquor and liming is too low, although the ettringite particle of formation exists with the form of colloidal sol, but due to ettringite particle very little, the colloid substances of thickness can not be formed, also just do not have gelling material such as being dispersion cement, play the effect of template.Meanwhile, the solubleness of Tai-Ace S 150 in water has certain scope, impossible complete miscibility, and ettringite colloid, as template, is considered also not wish with too many from the angle of cost.So the ratio of preferably Tai-Ace S 150 and lime and a water can be limited in preferred version.
Test finds, the viscosity of pH value on ettringite colloid has significant impact, alum liquor is acid, liming is alkalescence, the two reaction is actually a kind of neutralization reaction, when pH value is too high or too low, the viscosity of ettringite colloid can reduce, and when pH value 7 ~ 9, the ettringite colloid of same concentrations has the highest viscosity.
Select suitable gelling material, coarse aggregate, fine aggregate and adulterant collocation in step (2), best concrete strength and other over-all propertieies can be obtained.
The selection of gelling material is also had influence on to the maintenance method in product later stage.If selection cement is major gelled material, various concrete pouring mode can be suitable for.The all right compatible existing foam cement equipment of production process, except instead of whipping agent with ettringite colloid, no longer needs the equipment such as whipping agent and foaming machine all the other batching, mixing, maintenance, cutting, pilings all applicable simultaneously.Complete compatible normal concrete Prefabrication technology and equipment simultaneously.
If select lime and gypsum to be major gelled material, then maintenance method preferably efficient vapor cure mode.Simultaneously production process can compatible gas concrete production unit, and except ettringite colloid instead of air entraining agent, the equipment such as all the other batching, mixing, maintenance, cutting, pilings are all applicable.
Leca in glass bead in fine aggregate, pearlstone and coarse aggregate, haydites of book structure, lytag, float stone, volcanic cinder are light skeletal, can reduce the concrete density of gained further.
The material ratio of step (3) ettringite colloid and the mixing of premix siccative, directly affects the concrete density of gained, intensity and thermal conductivity.Generally, ettringite rubber proportional is higher, and concrete density is lower, thermal conductivity is lower, intensity is also lower, and vice versa.Admixture and adding of fortifying fibre can improve concrete construction workability, pumping and concrete water-repellancy, anti-contracility and weather resistance etc.
By corresponding equipment and mold, bearing insulating brick, building block, sheet material and all kinds of fitted part can be obtained by technical solution of the present invention, also can be cast-in-place at the construction field (site).
beneficial effect.
In sum, relative to prior art, the present invention has following outstanding advantage.
1) the load bearing heat preserving concrete prepared for template with ettringite colloid of the present invention, have three-dimensional network microvoid structure, intensity can reach 10 ~ 50MPa, and thermal conductivity is 0.1 ~ 0.4w/mk, dry density <2000kg/m
3, do not ftracture, not efflorescence, the load bearing heat preserving integration of high-strength light high heat preservation performance of real reality.
2) the load bearing heat preserving concrete prepared for template with ettringite colloid of the present invention, be pure inorganic materials, fire resistance is good, environment friendly and pollution-free, and weather resistance is high, can the life-span same with buildings.
3) the load bearing heat preserving concrete prepared for template with ettringite colloid of the present invention, raw material is cheap to be easy to get, and technique is simple, and Material Compatibility is good, and stability is high, and production process is easy to control, and is conducive to automatization mass industrialized production.
4) the load bearing heat preserving concrete prepared for template with ettringite colloid of the present invention, the parts such as fragment of brick, building block, sheet material and assembled stair, wallboard, floor, balcony slab, roof boarding can be prepared into, also can working-yard cast-in-place, meet the demand of disparity items.
5) the load bearing heat preserving concrete prepared for template with ettringite colloid of the present invention, can compatible process for producing aerated concrete, foamed concrete production technique and normal concrete Prefabrication technique at present, is beneficial to the transition and upgrade of conventional concrete industry.
embodiment.
Provided below is the concrete embodiment of load bearing heat preserving that ettringite colloid is template, as the present invention is described in more detail.
Embodiment 1.
Get 6.0kg Tai-Ace S 150 and be dissolved in 20.0kg water, preparation alum liquor, gets 2.2kg unslaked lime and is dissolved in 20.0kg water, preparation liming.Liming is placed in container, slowly adds alum liquor when 200r/min stirs, until pH value is 7.0, obtain translucent ettringite colloid.Premix siccative is formulated as follows and mixes: silicate cement 35.0kg, fine sand 38.0kg, glass bead 8.0kg, leca 15.0kg, zeolite powder 1.0kg.Polypropylene fibre 0.5kg and economization agent 0.1kg is added the ettringite colloid made, after stirring 3min, obtain premix wet feed.Add premix siccative again, continue to stir 5min.Pour gained concrete slurry into mould and make fragment of brick.After natural curing 28d, gained sample dry density 1070kg/m
3, intensity 18MPa, thermal conductivity 0.18w/mk.
Embodiment 2.
Get 6.5kg Tai-Ace S 150 and be dissolved in 20.0kg water, preparation alum liquor, gets 2.3kg unslaked lime and is dissolved in 20.0kg water, preparation liming.Liming is placed in container, slowly adds alum liquor when 500r/min stirs, until pH value is 7.2, obtain translucent ettringite colloid.Premix siccative is formulated as follows and mixes: silicate cement 40.0kg, fine sand 50.0kg, glass bead 8.0kg, cobble 40.0kg, haydites of book structure 20.0kg, silicon powder 1.2kg.Glass fibre 1.0kg and water-resisting agent 0.1kg is added the ettringite colloid made, after stirring 5min, obtain premix wet feed.Add premix siccative again, continue to stir 8min.Pour gained concrete slurry into mould and make sheet material.After curing in water 28d, gained sample dry density 1310kg/m
3, intensity 25MPa, thermal conductivity 0.20w/mk.
Embodiment 3.
Get 4.0kg Tai-Ace S 150 and be dissolved in 20.0kg water, preparation alum liquor, gets 1.4kg unslaked lime and is dissolved in 20.0kg water, preparation liming.Alum liquor is placed in container, slowly adds liming when 1150r/min stirs, until pH value is 7.5, obtain translucent ettringite colloid.Premix siccative is formulated as follows and mixes: aluminosulfate cement 12.0kg, fine sand 20.0kg, expanded pearlite 15.0kg, haydites of book structure 15.0kg, silicon ash 0.8kg.Brucite fiber 1.0kg and retardant 0.1kg is added the ettringite colloid made, after stirring 6min, obtain premix wet feed.Add premix siccative again, continue to stir 4min.Pour gained concrete slurry into mould and make abnormity component.After natural curing 14d, gained sample dry density 950kg/m
3, intensity 15MPa, thermal conductivity 0.14w/mk.
Embodiment 4.
Get 4.5kg Tai-Ace S 150 and be dissolved in 20.0kg water, preparation alum liquor, gets 1.6kg unslaked lime and is dissolved in 20.0kg water, preparation liming.Liming is placed in container, slowly adds alum liquor when 2000r/min stirs, until pH value is 7.8, obtain translucent ettringite colloid.Premix siccative is formulated as follows and mixes: silicate cement 10.0kg, lime 10.0kg, gypsum 2.0kg, fine sand 28.0kg, glass bead 7.0kg, lytag 15.0kg, volcanic ash 2.0kg.Sepiolite fibre 1.0kg and thickening material 0.1kg is added the ettringite colloid made, after stirring 6min, obtain premix wet feed.Add premix siccative again, continue to stir 4min.Pour gained concrete slurry into mould and make building block.At 160 DEG C after vapor cure 8h, gained sample dry density 890kg/m
3, intensity 12MPa, thermal conductivity 0.12w/mk.
Embodiment 5.
Get 7.0kg Tai-Ace S 150 and be dissolved in 20.0kg water, preparation alum liquor, gets 2.5kg unslaked lime and is dissolved in 20.0kg water, preparation liming.Liming is placed in container, slowly adds alum liquor when 80r/min stirs, until pH value is 7.1, obtain translucent ettringite colloid.Premix siccative is formulated as follows and mixes: silicate cement 45.0kg, fine sand 50.0kg, glass bead 5.0kg, rubble 60.0kg, haydites of book structure 30.0kg, silicon ash 5.0kg.Trevira 1.0kg and economization agent 0.1kg is added the ettringite colloid made, after stirring 6min, obtain premix wet feed.Add premix siccative again, continue to stir 10min.Pour gained concrete slurry into mould and make sheet material.Under room temperature after covered with plastic film maintenance 28d, gained sample dry density 1480kg/m
3, intensity 36MPa, thermal conductivity 0.24w/mk.
The above is only preferred embodiment of the present invention, not does any type of restriction to the present invention.Every above embodiment is done according to techniques and methods essence of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of techniques and methods scheme of the present invention.
Claims (5)
1. one kind take ettringite as load bearing heat preserving concrete of template and preparation method thereof, and it comprises the following steps:
(1) ettringite colloid is prepared;
Described ettringite colloid, is generated by Tai-Ace S 150 and lime reaction or is reacted by calcium aluminate and gypsum and generate or mixed by ettringite powder and water;
Described ettringite colloid is viscous fluid, and pH value is 5 ~ 12;
(2) take gelling material, fine aggregate, coarse aggregate, adulterant in proportion, stir, obtained premix siccative;
The massfraction of described premix siccative composition is than being gelling material: fine aggregate: coarse aggregate: adulterant=1 ~ 30:1 ~ 40:2 ~ 90:0.1 ~ 5;
Described gelling material comprises one or more of cement, lime and gypsum;
Described cement comprises silicate cement, aluminate cement, aluminosulfate cement, ferro-aluminate cement, and the complex cement that above cement fusion slag, flyash, volcanic ash and gypsum are formed;
Described fine aggregate comprises one or more in fine sand, glass bead, pearlstone;
Described coarse aggregate comprises one or more in rubble, cobble, leca, haydites of book structure, lytag, float stone, volcanic cinder;
Described adulterant comprises one or more in flyash, blast-furnace slag, volcanic ash, zeolite powder, vermiculite power, silicon ash, silicon powder, diatomite, wilkinite, attapulgite clay, rice hull ash;
(3) ettringite colloid and fiber, admixture are mixed, obtained premix wet feed;
Described premix wet feed, its quality of material mark ratio is: ettringite colloid: fiber: admixture=10 ~ 1000:0.1 ~ 1:0.01 ~ 10;
Described fiber reinforced material comprises one or more in glass fibre, trevira, polypropylene fibre, xylon, cellulosic fibre, sepiolite fibre, brucite fiber;
Described admixture comprises one or more in water reducer, economization agent, water-resisting agent, thickening material, pumping agent, hardening accelerator, retardant;
(4) by premix siccative and the mixing of premix wet feed, inject mould after stirring and obtain formation of concrete, maintenance;
Described premix siccative and the mixing of premix wet feed, its quality of material mark ratio is, premix siccative: premix wet feed=1 ~ 100:1 ~ 100;
Described injection mould molding, obtains product and comprises fragment of brick, building block, sheet material and assembled stair, wallboard, floor, balcony slab, roof boarding parts, simultaneously can also be cast-in-place shaping at the construction field (site);
Described formation of concrete maintenance comprises natural curing, vapor cure, curing in water, overlay film maintenance.
2. according to claim 1 a kind of take ettringite as load bearing heat preserving concrete of template and preparation method thereof, it is characterized in that the ettringite colloid described in step (1), generated by Tai-Ace S 150 and lime reaction or reacted by calcium aluminate and gypsum and generate or mixed by ettringite powder and water, preferably generated by Tai-Ace S 150 and lime reaction.
3. according to claim 1 a kind of take ettringite as load bearing heat preserving concrete of template and preparation method thereof, it is characterized in that the ettringite colloid described in step (1), when being generated by Tai-Ace S 150 and lime reaction, first that Tai-Ace S 150 is water-soluble, Tai-Ace S 150 and quality mark are 1 ~ 50:100; Liming is mixed with water by unslaked lime or white lime, and preferred unslaked lime mixes with water, and the massfraction of unslaked lime and water is 1 ~ 100:100.
4. according to claim 1 a kind of take ettringite as load bearing heat preserving concrete of template and preparation method thereof, it is characterized in that the described ettringite colloid of step (1) is viscous fluid, pH value is 6 ~ 10, preferably 7 ~ 9.
5. according to claim 1 a kind of take ettringite as load bearing heat preserving concrete of template and preparation method thereof, it is characterized in that the described premix siccative of step (4) and the mixing of premix wet feed, its quality of material mark ratio is, premix siccative: premix wet feed=1 ~ 10:1 ~ 10.
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| CN106639019A (en) * | 2016-12-15 | 2017-05-10 | 南京市消防工程有限公司宜兴安装分公司 | Fireproof cement board |
| CN106699060A (en) * | 2016-12-26 | 2017-05-24 | 安徽新瑞重工股份有限公司 | Assembly concrete prefabricated wallboard material using ettringite as template agent |
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| CN106365482B (en) * | 2016-08-30 | 2018-06-08 | 河南理工大学 | A kind of ultra-fine entringite, preparation method and its application in cement based grouting material |
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| CN106699060A (en) * | 2016-12-26 | 2017-05-24 | 安徽新瑞重工股份有限公司 | Assembly concrete prefabricated wallboard material using ettringite as template agent |
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