CN113135716A - Anti-crack concrete and preparation process thereof - Google Patents
Anti-crack concrete and preparation process thereof Download PDFInfo
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- CN113135716A CN113135716A CN202110565876.0A CN202110565876A CN113135716A CN 113135716 A CN113135716 A CN 113135716A CN 202110565876 A CN202110565876 A CN 202110565876A CN 113135716 A CN113135716 A CN 113135716A
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- 239000004567 concrete Substances 0.000 title claims abstract description 118
- 238000002360 preparation method Methods 0.000 title abstract description 72
- 239000012782 phase change material Substances 0.000 claims abstract description 117
- 239000002131 composite material Substances 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 9
- 239000011398 Portland cement Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 4
- 239000002985 plastic film Substances 0.000 claims abstract description 4
- 229920006255 plastic film Polymers 0.000 claims abstract description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 57
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 40
- 239000005022 packaging material Substances 0.000 claims description 39
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 claims description 30
- 239000000839 emulsion Substances 0.000 claims description 30
- 239000011241 protective layer Substances 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 28
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 24
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 23
- 239000005639 Lauric acid Substances 0.000 claims description 20
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 16
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 claims description 15
- 235000021355 Stearic acid Nutrition 0.000 claims description 15
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 15
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 15
- 239000008117 stearic acid Substances 0.000 claims description 15
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 14
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 12
- 238000005336 cracking Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- NKAMGQZDVMQEJL-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodec-1-ene Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C=C NKAMGQZDVMQEJL-UHFFFAOYSA-N 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000003377 acid catalyst Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000036571 hydration Effects 0.000 abstract description 15
- 238000006703 hydration reaction Methods 0.000 abstract description 15
- 239000004568 cement Substances 0.000 abstract description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 230000000844 anti-bacterial effect Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000003999 initiator Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000007334 copolymerization reaction Methods 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 229910002808 Si–O–Si Inorganic materials 0.000 description 3
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- 238000009395 breeding Methods 0.000 description 3
- 230000001488 breeding effect Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
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- 239000011248 coating agent Substances 0.000 description 2
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- 150000001875 compounds Chemical class 0.000 description 2
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- 230000017525 heat dissipation Effects 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- 229920000647 polyepoxide Polymers 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 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 1
- 241000231687 Heza Species 0.000 description 1
- 229910008051 Si-OH Inorganic materials 0.000 description 1
- 229910006358 Si—OH Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
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- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the technical field of concrete, and particularly discloses anti-crack concrete and a preparation process thereof. The anti-crack concrete consists of the following raw materials: 180-240 parts of Portland cement, 50-70 parts of fly ash, 20-30 parts of slag, 850 parts of fine aggregate, 920 parts of coarse aggregate 880, 8-10 parts of admixture, 200 parts of water 150, 10-15 parts of silicon powder and 40-60 parts of composite phase-change material; the preparation process comprises the following steps: 1) mixing and stirring the raw materials to obtain an anti-crack concrete primary mixture; 2) the anti-crack concrete primary mixture is densely formed to form an anti-crack concrete layer; 3) and paving a plastic film on the surface of the anti-crack concrete layer, and moisturizing, curing and drying to obtain the anti-crack concrete. The composite phase-change material can store cement hydration heat, reduces the probability of temperature cracks caused by large internal and external temperature difference of concrete, and improves the crack resistance of the concrete.
Description
Technical Field
The application relates to the technical field of concrete, in particular to anti-crack concrete and a preparation process thereof.
Background
Concrete is the most important building material in civil engineering at present, and is generally prepared from a cementing material, aggregate, water and an additive according to a certain proportion, and is prepared by uniformly stirring, closely molding, curing and hardening.
In the related art, after concrete is poured, a great amount of hydration heat is usually generated when cement in the concrete is hydrated, so that the temperature in the concrete is increased sharply and reaches 60-70 ℃. Concrete usually has certain structure size, simultaneously because the heat transfer performance of concrete material is general relatively poor to make the inside heat of concrete detain inside the concrete because of long, the heat transfer rate of heat transfer path, lead to inside intensification range of concrete and surface intensification range to differ great, and then make the concrete structure form great difference in temperature.
In view of the above-mentioned related technologies, after the concrete structure forms an internal and external temperature difference, the concrete structure cannot freely stretch and deform due to the constraint of the boundary such as the pouring structure, thereby generating a temperature stress, and when the temperature tensile stress on the surface of the concrete tensile area exceeds the corresponding ultimate tensile strength of the concrete, the concrete structure will crack, thereby affecting the strength and quality of the concrete.
Disclosure of Invention
The application provides an anti-crack concrete for solving the problem that the concrete generates temperature cracks due to the internal and external temperature difference.
In a first aspect, the present application provides an anti-crack concrete, which adopts the following technical scheme:
the anti-crack concrete is prepared from the following raw materials in parts by weight: 180-240 parts of Portland cement, 50-70 parts of fly ash, 20-30 parts of slag, 850 parts of fine aggregate, 920 parts of coarse aggregate 880, 8-10 parts of admixture, 200 parts of water 150, 10-15 parts of silicon powder and 40-60 parts of composite phase change material.
By adopting the technical scheme, the Portland cement is added as a main cementing material to play a role in connecting other components in concrete; the coarse aggregate mainly plays a role of a framework, and the fine aggregate mainly plays a role of filling; the fly ash and the slag are added as admixture and can generate chemical reaction with hydration products of cement, so that the hydration heat of the cement can be effectively reduced to a certain extent, and the later strength and durability of the concrete are improved.
The silica powder is also added as an admixture and can perform a reverse chemical reaction with a product after cement hydration, so that the later strength and durability of the concrete are improved; the single addition of the silica powder can improve the hydration heat of cement, and the influence of the single addition of the silica powder on the hydration heat of the cement can be counteracted and the hydration heat of the cement can be reduced to a certain extent by a mode of mixing and adding the fly ash, the slag and the silica powder; meanwhile, the compactness of the composite phase-change material can be improved by adding the silicon powder, so that the composite phase-change material can be completely and compactly stored in the concrete, the combination degree of the composite phase-change material and the concrete is improved, and the heat absorption and storage performance of the composite phase-change material to the concrete is improved.
The temperature of the concrete is promoted to rise by the heat released by hydration of the concrete cement, and when the temperature is higher than the phase change temperature of the composite phase change material, the composite phase change material generates phase change and absorbs the heat, so that the heat released by hydration of the concrete is stored, and the probability of continuous temperature rise inside the concrete is reduced; the heat dissipation rate of the outer portion of the concrete is far greater than the heat dissipation rate of the inner portion of the concrete, when the temperature of the outer portion of the concrete is lower than the phase change temperature, the composite phase change material is subjected to phase change again to release heat, so that the temperature of the concrete is in a stable state, the probability of temperature cracks of the concrete due to the fact that the temperature difference between the inner portion and the outer portion of the concrete is large is reduced to a large extent, the probability of cracking of the concrete is effectively reduced, and the strength and the quality of the concrete are improved.
Preferably, the composite phase change material is made of a phase change material, a porous carrier and an encapsulation material, and the phase change material: porous carrier: the packaging material is prepared from the following components in percentage by mass: (3-4): 2.
by adopting the technical scheme, the porous carrier is selected to load the phase change material, the liquefied phase change material is mixed with the porous carrier, so that the pores of the porous carrier are filled with the phase change material, the fixation of the phase change material on the porous carrier is realized by utilizing the characteristic that the phase change material changes state along with the temperature, and finally, the surface of the porous carrier is encapsulated and shaped by utilizing the encapsulating material, thereby greatly reducing the loss of the phase change material after the phase change material is subjected to phase change again from the porous carrier, and realizing the stability of heat adsorption of the composite phase change material.
Preferably, the phase change material is composed of capric acid, lauric acid and stearic acid, and the capric acid: lauric acid: stearic acid is 3:5: 2.
by adopting the technical scheme, the ternary phase change system is formed by the capric acid, the lauric acid and the stearic acid, compared with a single phase change material system, the defect of single phase change temperature of the single phase change material system is overcome, and the phase change latent heat and the thermal cycle stability of the phase change material are improved to a certain extent.
Preferably, the porous carrier consists of ceramsite and diatomite, and the ceramsite: the diatomite comprises the following components in percentage by mass: (1-2).
By adopting the technical scheme, the ceramsite has firm shell, has honeycomb closed micropores inside, and has good heat insulation performance and shock resistance; the diatomite is applied to building materials as a common heat insulation material, has the characteristics of high porosity, strong absorption capacity and stable chemical property, can well adsorb the phase change material into gaps by utilizing the ceramsite and the diatomite as porous carriers, has good heat insulation performance, and can slow down the heat loss rate of the phase change material to a certain extent, so that the temperature change in concrete tends to be stable, the temperature difference between the outside and the inside of the concrete is reduced, and the probability of generating temperature cracks is further reduced.
Preferably, the packaging material is prepared from the following raw materials in percentage by weight: 10-15% of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 4-5% of a silane coupling agent, 2-3% of tris (2-chloropropyl) phosphate, 1-2% of ammonium persulfate, 3-5% of propylene glycol and the balance of a styrene-acrylic emulsion.
By adopting the technical scheme and adding the styrene-acrylic emulsion, the packaging material has good water resistance, heat resistance and aging resistance, and the service life of the composite phase-change material is prolonged; under the action of a silane coupling agent and ammonium persulfate, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane can perform graft copolymerization with the styrene-acrylic emulsion, so that a branched Si-O-Si side group is introduced on a macromolecular chain, and when the styrene-acrylic emulsion is formed into a film, the hydrophobic group is transferred to the surface of the film to form a comb-shaped structure in an enriched manner, so that the hydrophilicity of the packaging material is reduced, and the water resistance of the packaging material is improved.
The addition of the tris (2-chloropropyl) phosphate enables the packaging material to have good flame retardant performance, and meanwhile, the tris (2-chloropropyl) phosphate can perform graft copolymerization with part of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane to generate the organosilicon quaternary ammonium salt, so that the surface of the packaging material has certain antibacterial and antibacterial properties, the amount of bacteria growing on the surface of the packaging material is reduced to a certain extent, and the influence on the heat adsorption function of the phase-change material due to the bacteria growing is avoided to a certain extent.
The addition of the propylene glycol enables the packaging material to have certain antibacterial performance, reduces the breeding rate of bacteria on the surface of the packaging material, and enables the components in the styrene-acrylic emulsion to be dispersed more uniformly. Meanwhile, the propylene glycol can play a role in assisting the film formation of the styrene-acrylic emulsion, the surface tension of the emulsion can be reduced, and the emulsion breaking probability of the emulsion is reduced to a certain extent, so that the packaging material can completely cover the surface of the porous carrier.
Preferably, the admixture consists of the following raw materials in percentage by weight: 30-40% of a water reducing agent; 30-40% of anti-cracking agent; 30-40% of retarder.
By adopting the technical scheme, the addition of the water reducing agent can disperse cement particles and improve the fluidity of concrete during stirring, so that the water consumption of the concrete during mixing is reduced; the anti-cracking agent can be well dispersed in the fine aggregate and absorb the internal stress in the concrete, so that the probability of shrinkage and settlement of the concrete is reduced, and the anti-cracking performance of the concrete is improved; the addition of the retarder can further reduce the hydration rate and the hydration heat of the cement, and the probability of the occurrence of the condition of overlarge temperature difference inside and outside the concrete due to the overlarge hydration rate of the cement is reduced to a greater extent.
Preferably, the surface of the composite phase-change material is further sprayed with a protective layer, and the protective layer is prepared from the following raw materials in parts by weight: 8-12 parts of ethyl orthosilicate, 8-1 part of silane coupling agent KH 5700.6, 14-16 parts of isopropanol, 12-13 parts of perfluorooctyl ethylene and 8-10 parts of hydrogen-containing fluorosilicone oil.
By passingBy adopting the technical scheme, the surface of the tetraethoxysilane can be hydrolyzed in the reaction process, and hydroxyl generated by hydrolysis can be subjected to condensation reaction with silicon hydroxyl generated by hydrolysis of the silane coupling agent KH570, so that the number of the surface hydroxyl is reduced, the problem that the whole system can generate self-aggregation phenomenon is solved, and the system is promoted to be dispersed more uniformly. The hydrolysis of the tetraethoxysilane can generate Si-OH bonds which can be dehydrated and condensed with-OH bonds generated by the hydrolysis of the alkoxy of KH570 to form Si-O-Si chain segments, so that the crosslinking density is increased, the film forming property of the protective layer is improved, and the protective layer can be well coated on the surface of the composite phase change material. A plurality of nano-micro-convex bodies are formed on the surface of the protective layer, so that the roughness of the surface of the protective layer is increased, the hydrophobicity of the protective layer is enhanced to a certain extent, and the retention time of water outside the composite phase-change material is reduced; simultaneous nano SiO2The structure of (2) improves the wear resistance of the protective layer, so that the protective layer has better wear resistance, thereby playing a role in protecting the composite phase change material.
Preferably, the protective layer is prepared by the following process steps:
s1, mixing ethyl orthosilicate, a silane coupling agent KH570 and isopropanol according to a proportion, adjusting the pH value to 4, dropwise adding distilled water accounting for 5% of the total mass of the monomers, heating to 60 ℃, and reacting for 6 hours to obtain A;
s2, mixing perfluorooctyl ethylene and hydrogen-containing fluorosilicone oil with the A in proportion, adding a chloroplatinic acid catalyst, heating to 90 ℃, and reacting for 4 hours to obtain B;
and S3, immersing the composite phase change material in the B for 1min, heating and drying the composite phase change material immersed in the B, controlling the heating temperature to be 150 ℃, taking out, and cooling to room temperature to obtain the composite phase change material sprayed with the protective layer.
By adopting the technical scheme, the hydroxyl generated by hydrolyzing tetraethoxysilane and the silicon hydroxyl generated by hydrolyzing KH570 are subjected to condensation reaction, so that the quantity of the surface hydroxyl of A is reduced, and meanwhile, the probability of hydrolysis and condensation of KH570 and tetraethoxysilane is lower, so that the nanometer SiO is improved2Self-agglomeration occurs, and thus A with better dispersity and uniform particle size is obtained.
The B is modified through the A, so that more nano-micro-convex bodies are formed on the surface of the formed protective layer, the surface roughness of the coating is increased, the contact area of water and the coating is reduced, the hydrophobicity of the protective layer is improved, the friction resistance of the protective layer is improved, the protective layer with good hydrophobicity and good friction resistance is obtained, the composite phase-change material is well protected, and the loss of the phase-change material caused by abrasion of the packaging material of the composite phase-change material can be avoided to a certain extent.
In a second aspect, the present application provides a preparation process of an anti-crack concrete, which adopts the following technical scheme:
a preparation process of anti-crack concrete comprises the following process steps:
1) mixing portland cement, fly ash, slag, fine aggregate, coarse aggregate, an additive and water according to a ratio, then adding silicon powder and the composite phase-change material sprayed with the protective layer according to a ratio, stirring, and obtaining an anti-crack concrete primary mixture after stirring;
2) paving the initial mixture of the anti-crack concrete, and compacting and forming after curing to form an anti-crack concrete layer;
3) and paving a plastic film on the surface of the anti-crack concrete layer, moisturizing and curing, and drying to obtain the anti-crack concrete.
By adopting the technical scheme, the silicon powder and the composite phase-change material sprayed with the protective layer are synchronously added into the concrete, so that the silicon powder can be in good contact with the composite phase-change material, and the combination degree of the composite phase-change material in the concrete can be improved to a certain extent.
In summary, the present application has the following beneficial effects:
1. because this application has adopted compound phase change material to preferably adopt phase change material, porous carrier and packaging material's cooperation mode, because compound phase change material can be to the heat that produces when cement hydration stores for the concrete temperature is in comparatively stable state, has reduced the concrete to a great extent and has produced the cracked probability of temperature because of the inside and outside difference in temperature is great, thereby improves the anti-cracking performance of concrete.
2. Preferentially adopt the protective layer to wrap up composite phase change material in this application, played the effect of protection to composite phase change material, avoided composite phase change material to a certain extent to take place wearing and tearing in stirring and work progress to make composite phase change material can be for a long time, work effectively, improved the crack resistance of concrete.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation example of composite phase-change Material
Preparation example 1
A composite phase change material is prepared from the following raw materials in parts by weight: 2kg of phase change material; 6kg of a porous carrier; 4kg of encapsulating material, and phase change material: porous carrier: the packaging material is prepared from the following components in percentage by mass: 3: 2;
the phase-change material is lauric acid, the porous carrier is diatomite, the packaging material is epoxy resin, the porous carrier adsorbs the lauric acid in a soaking, stirring and adsorbing manner, the lauric acid is heated to be completely phase-changed and stable, the porous carrier is added into the lauric acid in a molten state in proportion to be adsorbed and stirred, the adsorbed porous carrier is cooled and added into the epoxy resin to be packaged, and the composite phase-change material is obtained.
Preparation example 2
The difference between the preparation example 2 and the preparation example 1 is that the composite phase change material is prepared from the following raw materials in parts by weight: 2kg of phase change material; 8kg of a porous carrier; 4kg of encapsulating material, and phase change material: porous carrier: the packaging material is prepared from the following components in percentage by mass: 4: 2.
preparation example 3
Preparation 3 differs from preparation 1 in that 0.6kg of capric acid, 1kg of lauric acid and 0.4kg of stearic acid are selected as the phase change material, and capric acid: lauric acid: the stearic acid is in a mass ratio of 3:5: 2.
Preparation example 4
Preparation 4 differs from preparation 2 in that 0.6kg of capric acid, 1kg of lauric acid and 0.4kg of stearic acid are selected as the phase change material, and capric acid: lauric acid: the stearic acid is in a mass ratio of 3:5: 2.
Preparation example 5
The difference between the preparation example 5 and the preparation example 1 is that 3kg of ceramsite and 3kg of diatomite are selected as the porous carrier, and the ceramsite: the diatomite comprises the following components in percentage by mass: 1.
preparation example 6
The difference between the preparation example 6 and the preparation example 1 is that 2kg of ceramsite and 4kg of diatomite are selected as porous carriers, and the ceramsite: the diatomite comprises the following components in percentage by mass: 2.
preparation example 7
The difference between the preparation example 7 and the preparation example 1 is that the packaging material is prepared from the following raw materials in percentage by weight: 10% N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane; 4% of a silane coupling agent KH 570; 2% tris (2-chloropropyl) phosphate; 1% ammonium persulfate; 3% propylene glycol; 80% styrene-acrylic emulsion;
the preparation process of the packaging material comprises the following process steps: adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, a silane coupling agent KH570, 3% tris (2-chloropropyl) phosphate and propylene glycol into the styrene-acrylic emulsion in proportion, stirring uniformly, adding an initiator ammonium persulfate, heating to 90 ℃, and reacting for 3 hours to obtain the packaging material.
Preparation example 8
The difference between the preparation example 8 and the preparation example 1 is that the packaging material is prepared from the following raw materials in percentage by weight: 15% N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane; 5% of a silane coupling agent KH 570; 3% tris (2-chloropropyl) phosphate; 2% ammonium persulfate; 5% propylene glycol; 70% styrene-acrylic emulsion;
the preparation process of the packaging material comprises the following process steps: adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, a silane coupling agent KH570, 3% tris (2-chloropropyl) phosphate and propylene glycol into the styrene-acrylic emulsion in proportion, stirring uniformly, adding an initiator ammonium persulfate, heating to 90 ℃, and reacting for 3 hours to obtain the packaging material.
Preparation example 9
Preparation 9 differs from preparation 1 in that 0.6kg of capric acid, 1kg of lauric acid and 0.4kg of stearic acid are selected as the phase change material, and capric acid: lauric acid: stearic acid is in a mass ratio of 3:5:2, the porous carrier is selected from 3kg of ceramsite and 3kg of diatomite, and the weight ratio of the ceramsite is as follows: the diatomite comprises the following components in percentage by mass: 1.
preparation example 10
Preparation 10 differs from preparation 1 in that 0.6kg of capric acid, 1kg of lauric acid and 0.4kg of stearic acid are selected as the phase change material, and capric acid: lauric acid: the stearic acid is in a mass ratio of 3:5:2, and the packaging material is prepared from the following raw materials in percentage by weight: 10% N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane; 4% of a silane coupling agent KH 570; 2% tris (2-chloropropyl) phosphate; 1% ammonium persulfate; 3% propylene glycol; 80% styrene-acrylic emulsion;
the preparation process of the packaging material comprises the following process steps: adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, a silane coupling agent KH570, 3% tris (2-chloropropyl) phosphate and propylene glycol into the styrene-acrylic emulsion in proportion, stirring uniformly, adding an initiator ammonium persulfate, heating to 90 ℃, and reacting for 3 hours to obtain the packaging material.
Preparation example 11
The difference between the preparation example 11 and the preparation example 1 is that 3kg of ceramsite and 3kg of diatomite are selected as the porous carrier, and the ceramsite: the diatomite comprises the following components in percentage by mass: the packaging material is prepared from the following raw materials in percentage by weight: 10% N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane; 4% of a silane coupling agent KH 570; 2% tris (2-chloropropyl) phosphate; 1% ammonium persulfate; 3% propylene glycol; 80% styrene-acrylic emulsion;
the preparation process of the packaging material comprises the following process steps: adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, a silane coupling agent KH570, 3% tris (2-chloropropyl) phosphate and propylene glycol into the styrene-acrylic emulsion in proportion, stirring uniformly, adding an initiator ammonium persulfate, heating to 90 ℃, and reacting for 3 hours to obtain the packaging material.
Preparation example 12
Preparation 12 differs from preparation 1 in that 0.6kg of capric acid, 1kg of lauric acid and 0.4kg of stearic acid are selected as the phase change material, and capric acid: lauric acid: stearic acid is in a mass ratio of 3:5:2, the porous carrier is selected from 3kg of ceramsite and 3kg of diatomite, and the weight ratio of the ceramsite is as follows: the diatomite comprises the following components in percentage by mass: the packaging material is prepared from the following raw materials in percentage by weight: 10% N- β - (aminoethyl) - γ -aminopropyltrimethoxysilane; 4% of a silane coupling agent KH 570; 2% tris (2-chloropropyl) phosphate; 1% ammonium persulfate; 3% propylene glycol; 80% styrene-acrylic emulsion;
the preparation process of the packaging material comprises the following process steps: adding N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, a silane coupling agent KH570, 3% tris (2-chloropropyl) phosphate and propylene glycol into the styrene-acrylic emulsion in proportion, stirring uniformly, adding an initiator ammonium persulfate, heating to 90 ℃, and reacting for 3 hours to obtain the packaging material.
Preparation example 13
Preparation example 13 differs from preparation example 12 in that tris (2-chloropropyl) phosphate is not added and the amount of tris (2-chloropropyl) phosphate added is replaced by an equal amount of a styrene-acrylic emulsion.
Preparation example 14
Preparation 14 differs from preparation 12 in that N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane was not added and the amount of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane added was replaced by an equivalent amount of a styrene-acrylic emulsion.
Preparation example 15
Preparation 15 differs from preparation 12 in that propylene glycol was not added and the amount of propylene glycol added was replaced with an equal amount of styrene-acrylic emulsion.
Examples
Example 1
The anti-crack concrete is prepared from the following raw materials in parts by weight: 1.8kg of portland cement; 0.5kg of fly ash; 0.2kg of slag; 8kg of fine aggregate; 8.8kg of coarse aggregate; 0.08kg of admixture; 1.5kg of water; 0.1kg of silicon powder; 0.4kg of composite phase change material;
wherein the additive is a high-efficiency water reducing agent produced by double-ring assistant Limited liability company in Anyang city, and the composite phase-change material is obtained by taking lauric acid as a phase-change material and taking ceramsite as a porous matrix and by a vacuum impregnation mode;
the preparation process of the anti-crack concrete comprises the following process steps:
1) mixing portland cement, fly ash, slag, fine aggregate, coarse aggregate, an additive and water according to a ratio, then adding silicon powder and a composite phase-change material according to a ratio, stirring, and uniformly stirring to obtain an anti-crack concrete primary mixture;
2) paving the initial mixture of the anti-crack concrete, and compacting and forming after curing to form an anti-crack concrete layer;
3) and paving a plastic film on the surface of the anti-crack concrete layer, moisturizing and curing, and drying to obtain the anti-crack concrete.
Example 2
The difference between the example 2 and the example 1 is that the admixture consists of the following raw materials in percentage by weight: 30% of water reducing agent; 30% of an anti-cracking agent; 40% of retarder;
the water reducing agent is a high-efficiency water reducing agent produced by double-ring assistant Limited liability company in Anyang city, the anti-cracking agent is an anti-cracking agent produced by Gallery Chuang a kind of jade building material Limited company, and the retarder is a concrete retarder produced by Jinxin Longgong chemical company Limited company.
Example 3
The difference between the embodiment 3 and the embodiment 2 is that the composite phase-change material prepared in the preparation example 1 is selected as the composite phase-change material.
Example 4
The difference between the embodiment 4 and the embodiment 2 is that the composite phase-change material prepared in the preparation example 2 is selected as the composite phase-change material.
Example 5
The difference between the embodiment 5 and the embodiment 2 is that the composite phase-change material prepared in the preparation example 3 is selected as the composite phase-change material.
Example 6
Example 6 is different from example 2 in that the composite phase change material prepared in preparation example 4 is selected.
Example 7
Example 7 is different from example 2 in that the composite phase change material prepared in preparation example 5 is selected.
Example 8
Embodiment 8 differs from embodiment 2 in that the composite phase change material prepared in preparation example 6 is selected.
Example 9
Example 9 is different from example 2 in that the composite phase change material prepared in preparation example 7 is selected.
Example 10
Example 10 differs from example 2 in that the composite phase change material prepared in preparation example 8 is selected.
Example 11
Example 11 is different from example 2 in that the composite phase change material prepared in preparation example 9 is selected.
Example 12
Example 12 is different from example 2 in that the composite phase change material prepared in preparation example 10 is selected.
Example 13
Example 13 is different from example 2 in that the composite phase change material prepared in preparation example 11 is selected.
Example 14
Example 14 is different from example 2 in that the composite phase change material prepared in preparation example 12 is selected.
Example 15
Example 15 differs from example 2 in that the composite phase change material prepared in preparation example 13 was used.
Example 16
Example 16 differs from example 2 in that the composite phase change material prepared in preparation example 14 was used.
Example 17
Example 17 is different from example 2 in that the composite phase change material prepared in preparation example 15 is selected.
Example 18
The difference between the embodiment 17 and the embodiment 14 is that the surface of the composite phase change material is further sprayed with a protective layer, and the protective layer is made of the following raw materials in parts by weight: 0.8kg of ethyl orthosilicate; 0.06kg of a silane coupling agent KH 570; 1.4kg of isopropanol; 1.2kg of perfluorooctylethylene; 0.8kg of hydrogen-containing fluorosilicone oil (produced by Zhejiang Heza chemical Co., Ltd.);
the protective layer is prepared by the following process steps:
s1, mixing tetraethoxysilane, a silane coupling agent KH570 and isopropanol according to a proportion, dropwise adding distilled water accounting for 5% of the total mass of the tetraethoxysilane, the silane coupling agent KH570 and the isopropanol, heating to 60 ℃, stirring, adjusting the pH value to 4 by using HCl after stirring uniformly, and reacting at constant temperature for 6 hours after the pH value is adjusted to obtain A;
s2, mixing the perfluorooctyl ethylene and the hydrogen-containing fluorosilicone oil with the A in proportion, heating to 90 ℃, stirring, adding a chloroplatinic acid catalyst after uniformly stirring, and reacting for 4 hours at constant temperature to obtain B;
and S3, immersing the composite phase change material in the B for 1min, heating and drying the composite phase change material immersed in the B, controlling the heating temperature to be 150 ℃ and the drying time to be 60min, taking out and cooling to room temperature to obtain the composite phase change material sprayed with the protective layer.
Example 19
Example 19 differs from example 18 in that the protective layer is made from raw materials comprising, in parts by weight: 1.2kg of ethyl orthosilicate; 0.1kg of a silane coupling agent KH 570; 1.6kg of isopropanol; 1.3kg of perfluorooctylethylene; 1kg of hydrogen-containing fluorosilicone oil (produced by Zhejiang Heda chemical Co., Ltd.).
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that no composite phase change material is added.
Comparative example 2
Comparative example 2 differs from example 1 in that no silicon powder is added.
Comparative example 3
The difference between the comparative example 3 and the example 1 is that the surface of the composite phase change material is sprayed with a protective layer.
Performance test
For examples 1-19 and comparative examples 1-3 of the present application, performance tests were conducted on crack-resistant concrete.
And (3) crack resistance testing: the crack-resistant concretes prepared in examples 1 to 19 and comparative examples 1 to 3 were used as test samples, and after 28 days of curing, the compressive strength and the cleavage tensile strength were tested, and the surface of each group of samples was observed for the occurrence of cracks, and the lengths of the cracks were recorded. The test specimens are cube standard specimens of 150mm by 150 mm. The compressive strength and the cleavage compressive strength were tested according to GB/T50081-2002 ordinary concrete mechanical Property test method, and the test results are shown in Table 1.
TABLE 1 anti-crack Property test results Table
It can be seen by combining examples 1-2 and comparative examples 1-3 and table 1 that the addition of the composite phase change material to the anti-crack concrete can store the heat generated by cement hydration, so that the temperature of the concrete is in a relatively stable state, the probability of temperature cracks of the concrete due to large internal and external temperature difference is reduced to a greater extent, the probability of cracking of the concrete is effectively reduced, and the strength and quality of the concrete are improved.
The addition of the silica powder can improve the compactness of the composite phase-change material to a certain extent, so that the composite phase-change material can completely and compactly exist in concrete, the combination degree of the composite phase-change material and the concrete is improved, the heat absorption and heat storage performance of the composite phase-change material on the concrete is improved, and the strength of the concrete is improved.
The composite phase change material can be protected by adding the protective layer, and the degree of abrasion of the composite phase change material during stirring and construction is reduced, so that the possibility of loss of the composite phase change material is reduced, and the durability of the composite phase change material is improved.
As can be seen by combining examples 1-19 and comparative examples 1-3 with Table 1, the crack resistance of concrete can be remarkably improved by selecting the phase change material, the porous carrier and the encapsulating material in the application; meanwhile, the encapsulating material can reduce the loss of the phase-change material in the concrete, thereby prolonging the service life of the composite phase-change material and improving the crack resistance of the concrete to a certain extent.
As can be seen by combining examples 1-2, 13-19 and comparative examples 1-3 with Table 1, the addition of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane can improve the crack resistance of the concrete to some extent, probably because the N-beta- (aminoethyl) -gamma-aminopropyl trimethoxy silane can generate graft copolymerization reaction with the styrene-acrylic emulsion under the action of silane coupling agent and ammonium persulfate, thereby leading branched Si-O-Si side group to the macromolecular chain, further leading the styrene-acrylic emulsion to be formed into a film, the hydrophobic groups migrate to the surface of the film to be enriched to form a comb-shaped structure, so that the hydrophilicity of the packaging material is reduced, the water resistance of the packaging material is improved, and the influence of pouring water on the composite phase-change material in the concrete compaction forming process is reduced.
The addition of the tris (2-chloropropyl) phosphate can improve the crack resistance of the concrete to a certain extent, probably because the tris (2-chloropropyl) phosphate can perform graft copolymerization with part of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane to generate the organosilicon quaternary ammonium salt, so that the surface of the packaging material has certain antibacterial and antibacterial properties, the probability of bacteria breeding on the surface of the packaging material is reduced to a certain extent, the composite phase-change material can effectively absorb heat, the probability of the concrete generating the condition of large internal and external temperature difference is reduced, and the crack resistance of the concrete is improved.
The addition of the propylene glycol can improve the anti-cracking performance of the concrete to a certain extent, probably because the addition of the propylene glycol enables the packaging material to have certain antibacterial performance, the breeding rate of bacteria on the surface of the packaging material is reduced, and the components in the styrene-acrylic emulsion are dispersed more uniformly. Meanwhile, the propylene glycol can play a role in assisting the film formation of the styrene-acrylic emulsion, the surface tension of the emulsion can be reduced, and the probability of emulsion breaking of the emulsion is reduced to a certain extent, so that the packaging material can completely cover the surface of the porous carrier, the composite phase-change material can be stored and absorbs heat better, the probability of the concrete generating the condition of large internal and external temperature difference is reduced, and the anti-cracking performance of the concrete is improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The anti-crack concrete is characterized by comprising the following raw materials in parts by weight: 180-240 parts of Portland cement, 50-70 parts of fly ash, 20-30 parts of slag, 850 parts of fine aggregate, 920 parts of coarse aggregate 880, 8-10 parts of admixture, 200 parts of water 150, 10-15 parts of silicon powder and 40-60 parts of composite phase change material.
2. The crack-resistant concrete according to claim 1, wherein: the composite phase-change material is prepared from a phase-change material, a porous carrier and an encapsulation material, wherein the phase-change material comprises: porous carrier: the packaging material is prepared from the following components in percentage by mass: (3-4): 2.
3. the crack-resistant concrete according to claim 2, wherein: the phase change material is composed of capric acid, lauric acid and stearic acid, and the capric acid: lauric acid: stearic acid is 3:5: 2.
4. the crack-resistant concrete according to claim 2, wherein: the porous carrier consists of ceramsite and diatomite, and the ceramsite: the diatomite comprises the following components in percentage by mass: (1-2).
5. The crack-resistant concrete according to claim 2, wherein the encapsulating material is made from raw materials comprising, by weight: 10-15% of N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, 4-5% of a silane coupling agent, 2-3% of tris (2-chloropropyl) phosphate, 1-2% of ammonium persulfate, 3-5% of propylene glycol and the balance of a styrene-acrylic emulsion.
6. The crack-resistant concrete according to claim 1, wherein the admixture is composed of the following raw materials in percentage by weight: 30-40% of a water reducing agent; 30-40% of anti-cracking agent; 30-40% of retarder.
7. The crack-resistant concrete according to claim 5, wherein a protective layer is further sprayed on the surface of the composite phase-change material, and the protective layer is made of the following raw materials in parts by weight: 8-12 parts of ethyl orthosilicate, 8-1 part of silane coupling agent KH 5700.6, 14-16 parts of isopropanol, 12-13 parts of perfluorooctyl ethylene and 8-10 parts of hydrogen-containing fluorosilicone oil.
8. The crack-resistant concrete according to claim 7, wherein the protective layer is prepared by the following steps:
s1, mixing ethyl orthosilicate, a silane coupling agent KH570 and isopropanol according to a proportion, adjusting the pH value to 4, dropwise adding distilled water accounting for 5% of the total mass of the monomers, heating to 60 ℃, and reacting for 6 hours to obtain A;
s2, mixing perfluorooctyl ethylene and hydrogen-containing fluorosilicone oil with the A in proportion, adding a chloroplatinic acid catalyst, heating to 90 ℃, and reacting for 4 hours to obtain B;
and S3, immersing the composite phase change material in the B for 1min, heating and drying the composite phase change material immersed in the B, controlling the heating temperature to be 150 ℃, taking out, and cooling to room temperature to obtain the composite phase change material sprayed with the protective layer.
9. The process for preparing an anti-crack concrete according to claim 8, which comprises the following process steps:
1) mixing portland cement, fly ash, slag, fine aggregate, coarse aggregate, an additive and water according to a ratio, then adding silicon powder and the composite phase-change material sprayed with the protective layer according to a ratio, stirring, and obtaining an anti-crack concrete primary mixture after stirring;
2) paving the initial mixture of the anti-crack concrete, and compacting and forming after curing to form an anti-crack concrete layer;
3) and paving a plastic film on the surface of the anti-crack concrete layer, moisturizing and curing, and drying to obtain the anti-crack concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113563027A (en) * | 2021-08-09 | 2021-10-29 | 杭州钱神商品混凝土有限公司 | Anti-crack concrete and preparation method thereof |
| CN114989529A (en) * | 2022-04-23 | 2022-09-02 | 星空男孩(杭州)科技有限公司 | Environment-friendly composite mask layer and preparation method and application method thereof |
| CN115231871A (en) * | 2022-06-21 | 2022-10-25 | 宝鸡市东大洋混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010046A (en) * | 2016-06-29 | 2016-10-12 | 浙江佑谦特种材料有限公司 | Aqueous aluminum powder paint and preparation method thereof |
| CN108517161A (en) * | 2018-04-08 | 2018-09-11 | 西北大学 | Super-hydrophobic oleophobic coating and preparation method thereof, super-hydrophobic oleophobic film |
| CN108658532A (en) * | 2017-03-28 | 2018-10-16 | 北京中实上庄混凝土有限责任公司 | Self-compacting concrete and preparation method thereof |
| CN109928663A (en) * | 2017-12-18 | 2019-06-25 | 中国铁道科学研究院铁道建筑研究所 | A kind of phase transformation sand and preparation method thereof inhibiting the temperature rise of mass concrete aquation |
| CN109943265A (en) * | 2019-03-18 | 2019-06-28 | 浙江吴越人家新材料股份有限公司 | A kind of the ceramic tile gum and its preparation process of high bond strength |
| CN110451895A (en) * | 2019-09-12 | 2019-11-15 | 深圳市奇信集团股份有限公司 | A kind of phase-changing wall slurry and preparation method thereof |
| CN111484264A (en) * | 2019-01-27 | 2020-08-04 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Composite concrete hydration temperature rise inhibitor |
| CN112210294A (en) * | 2020-09-22 | 2021-01-12 | 广东极客亮技术有限公司 | Silicon carbide mildew-proof termite-proof coating, termite-proof wood and preparation method thereof |
-
2021
- 2021-05-24 CN CN202110565876.0A patent/CN113135716A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106010046A (en) * | 2016-06-29 | 2016-10-12 | 浙江佑谦特种材料有限公司 | Aqueous aluminum powder paint and preparation method thereof |
| CN108658532A (en) * | 2017-03-28 | 2018-10-16 | 北京中实上庄混凝土有限责任公司 | Self-compacting concrete and preparation method thereof |
| CN109928663A (en) * | 2017-12-18 | 2019-06-25 | 中国铁道科学研究院铁道建筑研究所 | A kind of phase transformation sand and preparation method thereof inhibiting the temperature rise of mass concrete aquation |
| CN108517161A (en) * | 2018-04-08 | 2018-09-11 | 西北大学 | Super-hydrophobic oleophobic coating and preparation method thereof, super-hydrophobic oleophobic film |
| CN111484264A (en) * | 2019-01-27 | 2020-08-04 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Composite concrete hydration temperature rise inhibitor |
| CN109943265A (en) * | 2019-03-18 | 2019-06-28 | 浙江吴越人家新材料股份有限公司 | A kind of the ceramic tile gum and its preparation process of high bond strength |
| CN110451895A (en) * | 2019-09-12 | 2019-11-15 | 深圳市奇信集团股份有限公司 | A kind of phase-changing wall slurry and preparation method thereof |
| CN112210294A (en) * | 2020-09-22 | 2021-01-12 | 广东极客亮技术有限公司 | Silicon carbide mildew-proof termite-proof coating, termite-proof wood and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113563027A (en) * | 2021-08-09 | 2021-10-29 | 杭州钱神商品混凝土有限公司 | Anti-crack concrete and preparation method thereof |
| CN113563027B (en) * | 2021-08-09 | 2022-09-30 | 杭州钱神商品混凝土有限公司 | Anti-crack concrete and preparation method thereof |
| CN114989529A (en) * | 2022-04-23 | 2022-09-02 | 星空男孩(杭州)科技有限公司 | Environment-friendly composite mask layer and preparation method and application method thereof |
| CN114989529B (en) * | 2022-04-23 | 2023-08-11 | 星空男孩(杭州)科技有限公司 | Environment-friendly composite surface sheet layer and preparation method and application method thereof |
| CN115231871A (en) * | 2022-06-21 | 2022-10-25 | 宝鸡市东大洋混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
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