CN113279500A - Prevent splitting open dismantlement formula fiber cement board interior wall - Google Patents
Prevent splitting open dismantlement formula fiber cement board interior wall Download PDFInfo
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- CN113279500A CN113279500A CN202110598084.3A CN202110598084A CN113279500A CN 113279500 A CN113279500 A CN 113279500A CN 202110598084 A CN202110598084 A CN 202110598084A CN 113279500 A CN113279500 A CN 113279500A
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- fiber
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- fiber cement
- polyformaldehyde
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- 239000000835 fiber Substances 0.000 title claims abstract description 156
- 239000004568 cement Substances 0.000 title claims abstract description 93
- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000011083 cement mortar Substances 0.000 claims abstract description 18
- 238000005336 cracking Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000007710 freezing Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 27
- 239000000377 silicon dioxide Substances 0.000 claims description 25
- 229910052681 coesite Inorganic materials 0.000 claims description 24
- 229910052906 cristobalite Inorganic materials 0.000 claims description 24
- 238000009832 plasma treatment Methods 0.000 claims description 24
- 229910052682 stishovite Inorganic materials 0.000 claims description 24
- 229910052905 tridymite Inorganic materials 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 238000007605 air drying Methods 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 239000010440 gypsum Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 7
- 229940080117 triethanolamine sulfate Drugs 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 2
- 239000000843 powder Substances 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
- B28B1/525—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement containing organic fibres, e.g. wood fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an anti-cracking detachable fiber cement board inner wall which comprises fiber cement board layers which are symmetrically arranged, wherein a limiting cement board layer is formed by splicing a plurality of fiber cement boards, an installation frame is fixed on the inner side of each fiber cement board layer, the installation frames are connected through keels, and each fiber cement board comprises the following raw materials in parts by weight: 20-40 parts of cement, 30-50 parts of aggregate, 10-20 parts of doping material, 4-8 parts of modified polyformaldehyde fiber, 3-5 parts of chopped basalt fiber, 1-3 parts of water reducing agent, 0.5-2 parts of anti-freezing agent and 15-30 parts of water. According to the invention, the modified polyformaldehyde fibers and the basalt fibers are added into the cement mortar, the plastic deformation of the concrete is restrained by the composite fibers, and the stress concentration of the concrete is dispersed, so that the cracking of the concrete is delayed or avoided, and the modified polyformaldehyde fibers and the basalt fibers have better mechanical properties than common fiber cement boards.
Description
Technical Field
The invention relates to the field of fiber cement boards, in particular to an anti-cracking detachable fiber cement board inner wall.
Background
The fiber cement board is a board prepared by taking cement as a basic material and an adhesive and taking mineral fiber cement and other fibers as reinforcing materials through the processes of pulping, forming, maintaining and the like, and is applied to the fireproof and flame-retardant performance of cable engineering in various domestic power plants, chemical enterprises and other electric-charge-intensive places. Also is the best fireproof flame-retardant material for indoor decoration fireproof flame-retardant engineering in public places such as superstores, hotels, guesthouses, file halls, closed clothing markets, light industry markets, movie theaters and the like.
The integrated building often adopts the fiber cement board as the inner wall partition, but in the practical application process, because the height is higher, the lower layer bears larger stress after the board and the board are superposed, and the stress mainly comprises settlement pressure and shaking pressure, so the phenomenon that the fiber cement board cracks often appears
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide the anti-cracking detachable fiber cement board inner wall, modified polyformaldehyde fibers and basalt fibers are added into cement mortar, the plastic deformation of concrete is restrained by composite fibers, the stress concentration of the concrete is dispersed, so that the cracking of the concrete is delayed or avoided, and the anti-cracking detachable fiber cement board inner wall has better mechanical property than a common fiber cement board.
The purpose of the invention can be realized by the following technical scheme:
the anti-cracking detachable fiber cement board inner wall comprises symmetrically arranged fiber cement board layers, wherein a limiting cement board layer is formed by splicing a plurality of fiber cement boards, mounting frames are fixed on the inner sides of the fiber cement board layers, and the mounting frames are connected through keels;
the fiber cement board comprises the following raw materials in parts by weight: 20-40 parts of cement, 30-50 parts of aggregate, 10-20 parts of doping material, 4-8 parts of modified polyformaldehyde fiber, 3-5 parts of chopped basalt fiber, 1-3 parts of water reducing agent, 0.5-2 parts of anti-freezing agent and 15-30 parts of water;
the preparation method of the fiber cement board comprises the following steps:
s1, mixing polyformaldehyde fibersActivating the surface of the polyformaldehyde fibers by plasma treatment, and grafting the activated polyformaldehyde fibers with nano SiO2To prepare modified polyformaldehyde fibers;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fiber and the basalt fiber, continuing stirring for 5-10min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, injecting cement mortar into the fiber cement board mold, maintaining for 24-48h with the mold in a normal temperature environment, and demolding after maintaining is finished;
s4, placing the demoulded fiber cement board in a steam environment of 140-160 ℃ for high-temperature steam curing for 3-5h, and then naturally cooling and air drying to obtain the fiber cement board.
Further preferably, the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder.
Further preferably, the preparation method of the modified polyformaldehyde fiber comprises the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 30-90s, wherein the power of the plasma treatment is 300-;
(2) adding a small amount of NaOH into deionized water to prepare 0.1-0.5 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 20-30min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating the solution to 40-80 ℃, oscillating for reaction for 2-4h, taking out the fiber after the reaction is finished, fully washing the fiber with deionized water, and drying the fiber.
Further preferably, the chopped basalt fiber has a diameter of 10-20 μm and a length of 10-15 mm.
More preferably, the water reducing agent is a polycarboxylic acid high efficiency water reducing agent.
Further preferably, the antifreeze agent consists of ethylene glycol, urea, triethanolamine and sodium dodecyl sulfate.
The invention has the beneficial effects that:
according to the invention, the modified polyformaldehyde fibers and the basalt fibers are added into the cement mortar, the plastic deformation of the concrete is restrained by the composite fibers, and the stress concentration of the concrete is dispersed, so that the cracking of the concrete is delayed or avoided, and the modified polyformaldehyde fibers and the basalt fibers have better mechanical properties than common fiber cement boards; the basalt fiber has high tensile strength, is acid-resistant and alkali-resistant, has basically the same components as concrete, has close density, has good compatibility and dispersibility with the concrete, can improve the strength of buildings, and can greatly prolong the service life of the buildings; meanwhile, the invention grafts nano SiO on the surface of the polyformaldehyde fiber by treating the polyformaldehyde fiber with plasma2Ca in concrete during hydration of concrete2+、Mg2+SiO with the surface of polyformaldehyde fiber2Hydration reaction occurs to form C-S-H gel, so that the adhesion between the fiber and the concrete is enhanced, and the drawing strength of the fiber is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
The utility model provides a prevent splitting open dismantlement formula fiber cement inboard wall, fiber cement sheet layer including the symmetry setting, spacing cement sheet layer is formed by the concatenation of a plurality of fiber cement boards, and the inboard fixed mounting bracket in fiber cement sheet layer is connected through fossil fragments between the mounting bracket.
Example 1
The fiber cement board comprises the following raw materials in parts by weight: 20 parts of cement, 30 parts of aggregate, 10 parts of doping material, 4 parts of modified polyformaldehyde fiber, 3 parts of chopped basalt fiber, 1 part of water reducing agent, 0.5 part of antifreezing agent and 15 parts of water; the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder; the diameter of the chopped basalt fiber is 10-20 mu m, and the length of the chopped basalt fiber is 10-15 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the antifreezing agent consists of glycol, urea, triethanolamine and sodium dodecyl sulfate;
the preparation method of the fiber cement board comprises the following steps:
s1, activating the surface of the polyformaldehyde fiber through plasma treatment, and grafting the activated polyformaldehyde fiber with nano SiO2The modified polyformaldehyde fiber is prepared by the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 30s, wherein the power of the plasma treatment is 300W;
(2) adding a small amount of NaOH into deionized water to prepare 0.1 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 20min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating the solution to 40 ℃, carrying out oscillation reaction for 2 hours, taking out the fiber after the reaction is finished, fully washing the fiber with deionized water, and drying the fiber;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fiber and the basalt fiber, continuing stirring for 5min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, pouring cement mortar into the fiber cement board mold, carrying out mold maintenance for 24 hours in a normal temperature environment, and demolding after the maintenance is finished;
and S4, placing the demoulded fiber cement board in a steam environment at 140 ℃ for high-temperature steam curing for 3h, and then naturally cooling and air-drying to obtain the fiber cement board.
Example 2
The fiber cement board comprises the following raw materials in parts by weight: 30 parts of cement, 40 parts of aggregate, 15 parts of doping material, 6 parts of modified polyformaldehyde fiber, 4 parts of chopped basalt fiber, 2 parts of water reducing agent, 1.2 parts of antifreezing agent and 22 parts of water; the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder; the diameter of the chopped basalt fiber is 10-20 mu m, and the length of the chopped basalt fiber is 10-15 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the antifreezing agent consists of glycol, urea, triethanolamine and sodium dodecyl sulfate;
the preparation method of the fiber cement board comprises the following steps:
s1, activating the surface of the polyformaldehyde fiber through plasma treatment, and grafting the activated polyformaldehyde fiber with nano SiO2The modified polyformaldehyde fiber is prepared by the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 60s, wherein the power of the plasma treatment is 400W;
(2) adding a small amount of NaOH into deionized water to prepare 0.2 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 25min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating the solution to 60 ℃, carrying out oscillation reaction for 3 hours, taking out the fiber after the reaction is finished, fully washing the fiber with deionized water, and drying the fiber;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fiber and the basalt fiber, continuing stirring for 8min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, injecting cement mortar into the fiber cement board mold, maintaining for 36h with the mold in a normal temperature environment, and demolding after the maintenance is finished;
and S4, placing the demoulded fiber cement board in a steam environment at 150 ℃ for high-temperature steam curing for 4 hours, and then naturally cooling and air-drying to obtain the fiber cement board.
Example 3
The fiber cement board comprises the following raw materials in parts by weight: 40 parts of cement, 50 parts of aggregate, 20 parts of doping material, 8 parts of modified polyformaldehyde fiber, 5 parts of chopped basalt fiber, 3 parts of water reducing agent, 2 parts of antifreezing agent and 30 parts of water; the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder; the diameter of the chopped basalt fiber is 10-20 mu m, and the length of the chopped basalt fiber is 10-15 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the antifreezing agent consists of glycol, urea, triethanolamine and sodium dodecyl sulfate;
the preparation method of the fiber cement board comprises the following steps:
s1, activating the surface of the polyformaldehyde fiber through plasma treatment, and grafting the activated polyformaldehyde fiber with nano SiO2The modified polyformaldehyde fiber is prepared by the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 90s, wherein the power of the plasma treatment is 500W;
(2) adding a small amount of NaOH into deionized water to prepare 0.5 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 30min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating the solution to 80 ℃, carrying out oscillation reaction for 4 hours, taking out the fiber after the reaction is finished, fully washing the fiber with deionized water, and drying the fiber;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fiber and the basalt fiber, continuing stirring for 10min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, injecting cement mortar into the fiber cement board mold, maintaining for 48 hours with the mold in a normal temperature environment, and demolding after the maintenance is finished;
and S4, placing the demoulded fiber cement board in a steam environment at 160 ℃ for high-temperature steam curing for 5 hours, and then naturally cooling and air-drying to obtain the fiber cement board.
Comparative example 1
The fiber cement board comprises the following raw materials in parts by weight: 30 parts of cement, 40 parts of aggregate, 15 parts of doping material, 6 parts of modified polyformaldehyde fiber, 2 parts of water reducing agent, 1.2 parts of antifreezing agent and 22 parts of water; the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder; the diameter of the chopped basalt fiber is 10-20 mu m, and the length of the chopped basalt fiber is 10-15 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the antifreezing agent consists of glycol, urea, triethanolamine and sodium dodecyl sulfate;
the preparation method of the fiber cement board comprises the following steps:
s1, activating the surface of the polyformaldehyde fiber through plasma treatment, and grafting the activated polyformaldehyde fiber with nano SiO2The modified polyformaldehyde fiber is prepared by the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 60s, wherein the power of the plasma treatment is 400W;
(2) adding a small amount of NaOH into deionized water to prepare 0.2 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 25min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating the solution to 60 ℃, carrying out oscillation reaction for 3 hours, taking out the fiber after the reaction is finished, fully washing the fiber with deionized water, and drying the fiber;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fibers, continuing stirring for 8min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, injecting cement mortar into the fiber cement board mold, maintaining for 36h with the mold in a normal temperature environment, and demolding after the maintenance is finished;
and S4, placing the demoulded fiber cement board in a steam environment at 150 ℃ for high-temperature steam curing for 4 hours, and then naturally cooling and air-drying to obtain the fiber cement board.
Comparative example 2
The fiber cement board comprises the following raw materials in parts by weight: 30 parts of cement, 40 parts of aggregate, 15 parts of doping material, 4 parts of chopped basalt fiber, 2 parts of water reducing agent, 1.2 parts of anti-freezing agent and 22 parts of water; the aggregate is composed of river sand with the particle size of 0.5-2mm and stones with the particle size of 5-15mm according to the mass ratio of 2:1, and the doping material is a mixture of fly ash, slag micro powder, gypsum and silicon micro powder; the diameter of the chopped basalt fiber is 10-20 mu m, and the length of the chopped basalt fiber is 10-15 mm; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent; the antifreezing agent consists of glycol, urea, triethanolamine and sodium dodecyl sulfate;
the preparation method of the fiber cement board comprises the following steps:
s1, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding basalt fibers, continuing stirring for 8min, and finally adding a water reducing agent and an antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s2, injecting cement mortar into the fiber cement board mold, maintaining for 36h with the mold in a normal temperature environment, and demolding after the maintenance is finished;
and S3, placing the demoulded fiber cement board in a steam environment at 150 ℃ for high-temperature steam curing for 4 hours, and then naturally cooling and air-drying to obtain the fiber cement board.
Performance detection
Referring to standard of mechanical property test method of common concrete (GB/T50081-2002), the fiber cement boards in examples 1-3 and comparative example 1 were subjected to a compression test, a bending test and a splitting tensile test, wherein the compression test and the splitting tensile test adopt a cubic test piece with a side length of 100mm, the bending test adopts a test piece with a side length of 100mmx100mmx400mm, a standard test mould and standard curing for 28d, and the obtained data are shown in the following table 1:
TABLE 1 mechanical Property testing of fiber cement boards
As can be seen from Table 1, the modified polyformaldehyde fibers and basalt fibers added into cement mortar can obtain better mechanical properties than a fiber cement board added with single fibers, and the modified polyformaldehyde fibers and basalt fibers have synergistic effect on concrete modification.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The anti-cracking detachable fiber cement board inner wall is characterized by comprising symmetrically arranged fiber cement board layers, wherein the limiting cement board layers are formed by splicing a plurality of fiber cement boards, mounting frames are fixed on the inner sides of the fiber cement board layers, and the mounting frames are connected through keels;
the fiber cement board comprises the following raw materials in parts by weight: 20-40 parts of cement, 30-50 parts of aggregate, 10-20 parts of doping material, 4-8 parts of modified polyformaldehyde fiber, 3-5 parts of chopped basalt fiber, 1-3 parts of water reducing agent, 0.5-2 parts of anti-freezing agent and 15-30 parts of water;
the preparation method of the fiber cement board comprises the following steps:
s1, activating the surface of the polyformaldehyde fiber through plasma treatment, and grafting the activated polyformaldehyde fiber with nano SiO2To prepare modified polyformaldehyde fibers;
s2, adding cement, aggregate, doping materials and water into a concrete mixer, stirring and mixing, adding the modified polyformaldehyde fiber and the basalt fiber, continuing stirring for 5-10min, and finally adding the water reducing agent and the antifreezing agent, and fully stirring and mixing to obtain cement mortar;
s3, injecting cement mortar into the fiber cement board mold, maintaining for 24-48h with the mold in a normal temperature environment, and demolding after maintaining is finished;
s4, placing the demoulded fiber cement board in a steam environment of 140-160 ℃ for high-temperature steam curing for 3-5h, and then naturally cooling and air-drying to obtain the fiber cement board.
2. The anti-cracking detachable fiber cement board inner wall as claimed in claim 1, wherein the aggregate is composed of river sand with a particle size of 0.5-2mm and stones with a particle size of 5-15mm in a mass ratio of 2:1, and the admixture is a mixture of fly ash, slag micropowder, gypsum and silica micropowder.
3. The anti-cracking detachable fiber cement board inner wall as claimed in claim 1, wherein the preparation method of the modified polyformaldehyde fiber comprises the following steps:
(1) cleaning polyformaldehyde fibers with absolute ethyl alcohol, drying, and then placing the cleaned polyformaldehyde fibers in a plasma treatment device for treatment for 30-90s, wherein the power of the plasma treatment is 300-;
(2) adding a small amount of NaOH into deionized water to prepare 0.1-0.5 wt% alkali liquor, and adding nano SiO2Adding into alkali liquor, and ultrasonically dispersing for 20-30min to obtain nanometer SiO2A solution;
(3) immersing the polyformaldehyde fiber after plasma treatment into SiO2Heating to 40-80 deg.C in the solution, shaking for 2-4 hr, taking out the fiber after reaction, and fully adding deionized waterAnd (5) drying after washing.
4. The split-proof demountable fiber cement panel interior wall according to claim 1, wherein said chopped basalt fiber has a diameter of 10-20 μm and a length of 10-15 mm.
5. The split-proof demountable fiber cement panel interior wall of claim 1, wherein said water reducer is a polycarboxylic acid high efficiency water reducer.
6. The disassembly-preventing fiber cement panel interior wall of claim 1, wherein the anti-freezing agent is composed of ethylene glycol, urea, triethanolamine and sodium dodecyl sulfate.
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