CN102976693B - Outer-wall external thermal-insulation anti-crack mortar prepared from superfine sand - Google Patents
Outer-wall external thermal-insulation anti-crack mortar prepared from superfine sand Download PDFInfo
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- CN102976693B CN102976693B CN201210528225.5A CN201210528225A CN102976693B CN 102976693 B CN102976693 B CN 102976693B CN 201210528225 A CN201210528225 A CN 201210528225A CN 102976693 B CN102976693 B CN 102976693B
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- mortar
- crack mortar
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- external thermal
- fine sand
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- 239000004576 sand Substances 0.000 title claims abstract description 41
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 37
- 238000009413 insulation Methods 0.000 title abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 239000003607 modifier Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 17
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 229920000800 acrylic rubber Polymers 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 7
- 229920000058 polyacrylate Polymers 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920002978 Vinylon Polymers 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 6
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 6
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 6
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 6
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 5
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 5
- 239000008187 granular material Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 239000004793 Polystyrene Substances 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 238000009877 rendering Methods 0.000 abstract 1
- 239000011440 grout Substances 0.000 description 9
- 238000005336 cracking Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920006389 polyphenyl polymer Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an outer-wall external thermal-insulation anti-crack mortar prepared from superfine sand. The outer-wall external thermal-insulation anti-crack mortar consists of the following ingredients in parts by weight: 25-35 parts of cement, 62-72 parts of superfine sand with fineness modulus of 0.5-0.6, 1.0-3.0 parts of shrinkage reducing agent, 0.2-0.4 part of polymer modifier, 0.1-0.3 part of water-retaining agent, and 0.05-0.15 part of fiber. When the outer-wall external thermal-insulation anti-crack mortar is in use, all the ingredients are mixed with water added in a certain ratio as required on site and are stirred uniformly. Proven by experiments, the outer-wall external thermal-insulation anti-crack mortar has the advantage of solving the technical problems such as serious shrinkage and poor construction performance obstructing the use of the superfine sand with fineness modulus of 0.5-0.6 in the anti-crack mortar; and the anti-crack mortar with the ratio of compressive strength reaching 1.90, the bonding strength reaching 1.0MPa and long operational time reaching 2h is prepared and the anti-crack mortar meets the technical requirements of JG158-2004 ETIRS (external thermal insulation rendering systems made of mortar with mineral binder and nsing wxpanded polystyrene granule as aggregate) on the anti-crack mortar.
Description
Technical field
The present invention relates to a kind of mortar for building, particularly the mortar for exterior of the ultra-fine sand preparation of a kind of use.
Background technology
Along with going deep into of work applied in energy saving building, external thermal insulation system is used widely.External thermal insulation system because residing envrionment temperature and humidity change greatly, autogenous shrinkage greatly or constructional method improper, the phenomenon such as easily cause external wall insulating layer generation hollowing, ftracture, come off, thus cause wall leakage, ventilative, the problem such as peel off.Addressing this problem one of effective means is on thermal insulation layer basis, to smear brush anticracking grout.At present, the major measure that overcomes thermal insulation layer cracking resistance has the fibre-reinforced anti-crack of employing, increases flexibility and viscosity, employing swelling agent reduce shrinkability etc. by organic polymer modification.Above-mentioned the whole bag of tricks cost improves greatly, technological process is very complicated.
Existing anticracking grout sand used is all medium sand or coarse sand, adopts the mortar of the outer thermal-insulating and anti-cracking of ultra-fine sand (ultra-fine sand of the present invention refers to that fineness modulus is the fine sand of 0.5-0.6) preparation external wall to have no report.Adopt ultra-fine sand preparation anticracking grout, can solve the ultra-fine sand of local material utilization, reduce costs, be also technical breakthrough.But, adopt the shrinkage of ultra-fine sand preparation anticracking grout greatly to increase, especially easily cracking.
For above-mentioned deficiency, be badly in need of the mortar that development one can adopt the outer thermal-insulating and anti-cracking of ultra-fine sand (fineness modulus 0.5-0.6) preparation external wall, in gathering materials on the spot, reduce costs in solution, also can solve ultra-fine sand preparation Mortar shrinkage amount greatly, the technical problem such as especially easily ftracture, come off, and water-retentivity and slow setting good, easy construction.
Summary of the invention
In view of this, the object of this invention is to provide the mortar for exterior of the ultra-fine sand of a kind of use preparation, not only can solve ultra-fine sand preparation Mortar shrinkage amount greatly, the problem that especially easily ftractures, come off, and water-retentivity and slow setting good, easy construction.
The object of the invention is to realize by following technique means: the mortar for exterior of the ultra-fine sand preparation of a kind of use, comprise by weight following component: cement 25-35, fineness modulus is the ultra-fine sand 62-72 of 0.5-0.6, economization agent 1.0-3.0, polymer modifiers 0.2-0.4, water-holding agent 0.1-0.3, fiber 0.05-0.15.
Further, described economization agent is that diethylene glycol monobutyl ether and calcium oxide are the mixture of 1: 1 in mass ratio.
Further, described polymer modifiers is that acrylic rubber powder, polyvinyl alcohol rubber powder or acrylic rubber powder and polyvinyl alcohol rubber powder are the mixture of 1: 1 in mass ratio.
Further, described water-holding agent is that TYLOSE 30000, hydroxypropyl methyl cellulose ether or TYLOSE 30000 and hydroxypropyl methyl cellulose ether are the mixture of 2: 1 in mass ratio
Further, described fiber is that polypropylene fibre, vinylon fiber or polypropylene fibre and vinylon fiber are the mixture of 1: 3 in mass ratio.
Further, described cement is 32.5 or 42.5 ordinary Portland cements.
Beneficial effect of the present invention: the mortar for exterior of the ultra-fine sand preparation of use of the present invention, comprise by weight following component: cement 25-35, fineness modulus is the ultra-fine sand 62-72 of 0.5-0.6, economization agent 1.0-3.0, polymer modifiers 0.2-0.4, water-holding agent 0.1-0.3, fiber 0.05-0.15.When use, scene adds as required a certain proportion of water and stirs.
Traditional theory and practice all prove: with ultra-fine sand preparation anticracking grout, can solve the ultra-fine sand of local material utilization, reduce costs, but shrinkage will increase greatly, especially easily ftractures.But, pass through verification experimental verification, the mortar for exterior of the ultra-fine sand preparation of use of the present invention, solve the ultra-fine sand of obstruction (fineness modulus 0.5-0.6) and shunk the poor technical barrier of large workability for anticracking grout, prepare backfin than the anticracking grout that can reach 1.90, cohesive strength can reach 1.0MPa, operable time can reach 2h, met the technical requirements of JG158-2004 " glue powder polyphenyl granule exterior wall outer heat preservation system " to anticracking grout.
Compared with existing mortar, described advantage is specially:
1, adopt amphiphilic economization agent control shrinkage, mortar dry shrinkage amount reduces by 48% left and right, and mortar self-constriction reduces approximately 70%.
2, adopt polymer modification, tensile bond strength is improved more than 46%, backfin is than reducing approximately 28%.
3, adopt fiber reinforcement, energy-to-break has been improved more than 86%.
4, adopt water-holding agent, make coursing degree of mortar reduction by 75%, bleeding rate reduce by 93%.
Its mechanism telling on is:
The first, economization agent control shrinkage mechanism
External wall is incubated that surface layer ftractures, comes off, hollowing outward, is mainly because Behavior of Hardened Cement Paste causes in the shrinkage strain under constraint condition, as plastic shrinkage, dry shrinkage, temperature shrinkage, self-constriction and chemical shrinkage etc.; When the stress causing when this restrained deformation or strain are greater than the ultimate tensile strength of Behavior of Hardened Cement Paste or ultimate tensile strength, crack will produce.The present invention adopts amphipathic economization agent, it reduces mechanism: along with the carrying out of hydrated cementitious, economization agent is filled in cement slurry hole solution, increase the contact angle of Behavior of Hardened Cement Paste hole solution and capillary hole wall, reduce pore water surface tension, reduce the string stress producing while causing pore dehydration due to hydrated cementitious or moisture evaporation.
The second, polymkeric substance increases flexible mechanism
Polymkeric substance acrylic rubber powder (or polyvinyl alcohol rubber powder) is the polymer substance with long-chain shape, after adding in mortar, polymer beads is dispersed in around cement granules and sand, after aquation, cohesion, form sticking, the continuous shape of tool or netted film structure, hole in filling concrete stone and tiny crack, obviously improve the bonding state of pore structure, water mudrock structure and the sand of sand-cement slurry, make internal structure be tending towards perfect, form whippy space reticulated structure, the toughness that has increased mortar, resistance to cleavage is improved.
The 3rd, fiber-reinforced mechanism
In mortar, mix fiber, it is random in being uniformly distributed that fiber is in sand-cement slurry, forms three-dimensional " skeleton " structure, be overlapped on crack place, stop or hinder the development of crackle, alleviate the stress concentration phenomenon of crack tip, reduce source, crack, improve resistance to cleavage and the toughness of sand-cement slurry.
Embodiment
Example 1
A mortar for exterior for the ultra-fine sand preparation of use, its composition and weight content are: 32.5 grades of ordinary Portland cement 350kg, the ultra-fine sand 620kg that fineness modulus is 0.5, economization agent 20kg, acrylic rubber powder 3kg, TYLOSE 30000 2kg, polypropylene fibre 1kg.Wherein, economization agent is that diethylene glycol monobutyl ether and calcium oxide are the mixture of 1: 1 in mass ratio.
Example 2
A mortar for exterior for the ultra-fine sand preparation of use, its composition and weight content are: 42.5 grades of ordinary Portland cement 250kg, the ultra-fine sand 720kg that fineness modulus is 0.6, economization agent 30kg, polyvinyl alcohol rubber powder 4kg, hydroxypropyl methyl cellulose ether 3kg, vinylon fiber 1.5kg.Wherein economization agent is that diethylene glycol monobutyl ether and calcium oxide are the mixture of 1: 1 in mass ratio.
Example 3
A mortar for exterior for the ultra-fine sand preparation of use, its composition and weight content are: 42.5 grades of ordinary Portland cement 300kg, the ultra-fine sand 650kg that fineness modulus is 0.55, economization agent 2kg, polymer modifiers 3kg, water-holding agent 2kg, fiber 1kg.Wherein economization agent is that diethylene glycol monobutyl ether and calcium oxide are the mixture of 1: 1 in mass ratio, polymer modifiers is that acrylic rubber powder and polyvinyl alcohol rubber powder are the mixture of 1: 1 in mass ratio, water-holding agent is that TYLOSE 30000 is 2: 1 mixing with hydroxypropyl methyl cellulose ether in mass ratio, and fiber is that polypropylene fibre and vinylon fiber are the mixture of 1: 3 in mass ratio.
After the mortar of ultra-fine use of above-mentioned three embodiment gained sand preparation is added to the suitable water yield, form outer thermal-insulating and anti-cracking layer for exterior wall, three prepared mortars of embodiment all can meet the technical requirements of JG158-2004 " glue powder polyphenyl granule exterior wall outer heat preservation system " to anticracking grout.The wherein best performance of embodiment 3, its backfin ratio can be up to 1.90, cohesive strength can be 2h up to 1.0MPa, operable time.The property indices of embodiment 1 and embodiment 2 is all on the index of " JG158-2004 " glue powder polyphenyl granule exterior wall outer heat preservation system " " defined.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. with a mortar for exterior for ultra-fine sand preparation, it is characterized in that, comprise by weight following component: cement 25-35, fineness modulus is the ultra-fine sand 62-72 of 0.5-0.6, economization agent 1.0-3.0, polymer modifiers 0.2-0.4, water-holding agent 0.1-0.3, fiber 0.05-0.15; Wherein, described economization agent is that diethylene glycol monobutyl ether and calcium oxide are the mixture of 1:1 in mass ratio; Described water-holding agent is that TYLOSE 30000, hydroxypropyl methyl cellulose ether or TYLOSE 30000 and hydroxypropyl methyl cellulose ether are the mixture of 2:1 in mass ratio.
2. the mortar for exterior of the ultra-fine sand preparation of use according to claim 1, is characterized in that: described polymer modifiers is that acrylic rubber powder, polyvinyl alcohol rubber powder or acrylic rubber powder and polyvinyl alcohol rubber powder are the mixture of 1:1 in mass ratio.
3. the mortar for exterior of the ultra-fine sand preparation of use according to claim 1, is characterized in that: described fiber is that polypropylene fibre, vinylon fiber or polypropylene fibre and vinylon fiber are the mixture of 1:3 in mass ratio.
4. the mortar for exterior of the ultra-fine sand preparation of use according to claim 1, is characterized in that: described cement is 32.5 or 42.5 ordinary Portland cements.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210528225.5A CN102976693B (en) | 2012-12-10 | 2012-12-10 | Outer-wall external thermal-insulation anti-crack mortar prepared from superfine sand |
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| CN201210528225.5A CN102976693B (en) | 2012-12-10 | 2012-12-10 | Outer-wall external thermal-insulation anti-crack mortar prepared from superfine sand |
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| CN102976693B true CN102976693B (en) | 2014-05-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104987023A (en) * | 2015-07-09 | 2015-10-21 | 石狮国高电子科技有限公司 | Insulating and anti-cracking combination sand board prepared through power plant waste residues and production technology thereof |
| CN105130273A (en) * | 2015-07-10 | 2015-12-09 | 常州市诺金精密机械有限公司 | Modified oil-resistant emery board produced from power plant waste residues, and production technology thereof |
| CN106396548A (en) * | 2016-08-31 | 2017-02-15 | 武汉理工大学 | Impact-resistant and corrosion-proof cement-based composite material and preparation method thereof |
| CN108373301A (en) * | 2018-03-08 | 2018-08-07 | 代彦霞 | A kind of environmental protection anti-crack concrete |
| CN116425503A (en) * | 2023-03-14 | 2023-07-14 | 浙江亚厦装饰股份有限公司 | A kind of repair paste for glass magnesium board and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195529A (en) * | 2007-12-17 | 2008-06-11 | 重庆大学 | Anti-cracking mortar for external wall insulation |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195529A (en) * | 2007-12-17 | 2008-06-11 | 重庆大学 | Anti-cracking mortar for external wall insulation |
Non-Patent Citations (2)
| Title |
|---|
| 减缩剂和膨胀剂对水泥基自流平砂浆收缩开裂性能的影响比较研究;彭家惠等;《重庆建筑》;20091231;第8卷(第70期);第32页"1.1 原材料"、第35页"3 结论" * |
| 彭家惠等.减缩剂和膨胀剂对水泥基自流平砂浆收缩开裂性能的影响比较研究.《重庆建筑》.2009,第8卷(第70期),第32页"1.1 原材料"、第35页"3 结论". |
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Effective date of registration: 20210723 Address after: 401443 community 4, Anwen village, Anwen Town, Qijiang District, Chongqing Patentee after: Chongqing Yuju Environmental Protection Technology Co.,Ltd. Address before: 400030 11-4, No. 8-1, shazheng street, Shapingba District, Chongqing Patentee before: CHONGQING JIANDA BUILDING MATERIAL Co.,Ltd. |