CN117361970A - Environment-friendly anti-cracking thermal insulation mortar and preparation method thereof - Google Patents
Environment-friendly anti-cracking thermal insulation mortar and preparation method thereof Download PDFInfo
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- CN117361970A CN117361970A CN202311170124.XA CN202311170124A CN117361970A CN 117361970 A CN117361970 A CN 117361970A CN 202311170124 A CN202311170124 A CN 202311170124A CN 117361970 A CN117361970 A CN 117361970A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 115
- 238000009413 insulation Methods 0.000 title claims abstract description 72
- 238000005336 cracking Methods 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000002156 mixing Methods 0.000 claims abstract description 81
- 239000000843 powder Substances 0.000 claims abstract description 64
- 229920006389 polyphenyl polymer Polymers 0.000 claims abstract description 58
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 35
- 239000010881 fly ash Substances 0.000 claims abstract description 35
- 239000011398 Portland cement Substances 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000032683 aging Effects 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003469 silicate cement Substances 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 239000010703 silicon Substances 0.000 claims abstract description 12
- 239000011325 microbead Substances 0.000 claims description 43
- 241000196324 Embryophyta Species 0.000 claims description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 32
- 240000003826 Eichhornia crassipes Species 0.000 claims description 30
- 238000001125 extrusion Methods 0.000 claims description 27
- 238000001035 drying Methods 0.000 claims description 24
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 21
- 238000005904 alkaline hydrolysis reaction Methods 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 19
- -1 polypropylene Polymers 0.000 claims description 19
- 229920001155 polypropylene Polymers 0.000 claims description 19
- 238000005469 granulation Methods 0.000 claims description 17
- 230000003179 granulation Effects 0.000 claims description 17
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 16
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 16
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 16
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 16
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 16
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 16
- 235000012424 soybean oil Nutrition 0.000 claims description 14
- 239000003549 soybean oil Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 10
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007873 sieving Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 238000013329 compounding Methods 0.000 claims description 8
- 238000009210 therapy by ultrasound Methods 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 2
- 238000000643 oven drying Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000155 melt Substances 0.000 description 16
- 239000004793 Polystyrene Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 7
- 238000002791 soaking Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000035882 stress Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 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
- 241000169203 Eichhornia Species 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920006327 polystyrene foam Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- 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 mortar building materials, and specifically discloses environment-friendly anti-cracking thermal insulation mortar and a preparation method thereof, wherein the environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials: silicate cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water; the preparation method comprises the following steps: uniformly mixing 1/2-2/3 weight of Portland cement and 1/2-2/3 weight of water, adding polyphenyl coated vitrified micro bubbles, uniformly mixing the polyphenyl coated vitrified micro bubbles and the silicon micro bubbles, and aging to obtain a premix A; uniformly mixing the rest Portland cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer, and aging to obtain a premix B; uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar; the environment-friendly anti-cracking thermal insulation mortar prepared by the method has high strength, good toughness and excellent anti-cracking property, thermal insulation property and durability.
Description
Technical Field
The application relates to the technical field of mortar building materials, in particular to environment-friendly anti-cracking thermal insulation mortar and a preparation method thereof.
Background
Along with the improvement of people's environmental awareness, the building engineering trade changes to the green gradually. The external wall heat-insulating mortar is used as a novel green energy-saving environment-friendly material, and is developed rapidly. In the related art, the heat-insulating material for the external wall heat-insulating mortar is mainly an organic heat-insulating material and an inorganic heat-insulating material. The organic heat-insulating material such as polystyrene foam plastic, polyvinyl chloride foam plastic, formaldehyde foam plastic, phenolic foam plastic, polyurethane foam plastic and the like has light weight and excellent heat insulation, sound absorption and other performances, but meanwhile, the organic heat-insulating material is not well combined with a building structure base layer, so that a cold-hot bridge is easily formed, the durability is poor, the combustion is easy, and serious fire hazards exist in the use process; inorganic heat-insulating materials such as rock wool, glass wool, expanded perlite, vitrified microbeads and the like belong to nonflammable materials, and have the advantages of stable performance, good durability and corrosion resistance, and good heat-insulating performance. Along with the improvement of energy-saving requirements and fireproof requirements of high-rise buildings on the building external heat insulation system, the inorganic heat insulation material has stable physical and chemical properties, good heat insulation effect and excellent fireproof performance, and becomes the main direction of the development of the heat insulation material in the building external wall heat insulation system.
In the inorganic thermal insulation mortar series, because the aggregate is the rigid particles, the thermal insulation layer of the wall surface can generate certain stress in the process of frequent temperature rise and climate change, but for the rigid particles such as expanded perlite, vitrified microbeads and the like, the stress of thermal expansion, cold contraction and wet expansion, dry shrinkage cannot be absorbed through deformation, so that in the practical application process, after the inorganic thermal insulation mortar is used for coating the wall surface in batches, the stress cannot be relieved, strain is generated, the strain is accumulated to a certain extent, a cracking phenomenon is generated, the fireproof layer and the decorative layer are further torn, water seepage, freeze thawing damage are generated in the seasonal change process, large cracks and hollows are developed, and the service life of the whole thermal insulation system is damaged. Based on the above statement, the application provides an environment-friendly anti-cracking thermal insulation mortar and a preparation method thereof.
Disclosure of Invention
In order to solve the problems that after the existing inorganic thermal insulation mortar is coated on the wall surface in batches, stress cannot be eliminated, cracking phenomenon is generated when the stress is accumulated to a certain degree, the service life of the whole thermal insulation system is damaged, and the like, the application provides the environment-friendly anti-cracking thermal insulation mortar and a preparation method thereof.
In a first aspect, the application provides an environment-friendly anti-cracking thermal insulation mortar, which adopts the following technical scheme:
an environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560-640 parts of silicate cement, 140-160 parts of fly ash, 80-100 parts of polyphenyl coated vitrified micro bubbles, 6-16 parts of composite fibers, 12-18 parts of silica micropowder, 10-14 parts of polycarboxylic acid high-efficiency powder water reducer and 400-600 parts of water.
By adopting the technical scheme, silicate cement is selected as a main cementing material of the mortar, and the fly ash is blended, so that the strength and cohesiveness of the mortar can be ensured, and meanwhile, the durability, crack resistance and chemical stability of the mortar are ensured; the polystyrene coated vitrified microbeads are used as aggregate, so that the self weight of the mortar is reduced, the heat insulation performance and mechanical performance of the mortar are improved, the waterproof performance and crack resistance of the mortar are improved, and the expansion and contraction deformation of the mortar caused by the influence of external natural conditions are reduced; the addition of the composite fiber can obviously improve the toughness and crack resistance of the mortar, prevent the expansion of cracks and increase the tensile strength of the mortar when the mortar is subjected to stretching or impact force; by mixing the silica powder, the fluidity, the impermeability and the crack resistance of the mortar can be improved, microscopic pores in the mortar can be filled, and the compactness of the mortar can be improved; the environment-friendly anti-cracking thermal insulation mortar prepared by the method has high strength, good toughness and excellent anti-cracking property, thermal insulation property and durability.
Preferably, the polyphenyl coated vitrified microbead is prepared by the following method:
and uniformly mixing the PS reclaimed material, the vitrified microbeads, the hydroxypropyl methylcellulose and the sodium dodecyl benzene sulfonate, and performing melt extrusion granulation to obtain the polyphenyl coated vitrified microbeads.
Preferably, the mass ratio of the PS reclaimed material to the vitrified microbeads to the hydroxypropyl methylcellulose to the sodium dodecyl benzene sulfonate is 20-24:50-60:3-5:1.
Preferably, the melt extrusion temperature is 215-235 ℃, the melt extrusion rotating speed is 300-500r/min, and the granulation particle size is 1-1.5mm.
By adopting the technical scheme, the vitrified microbeads have lower heat conductivity, and can reduce the heat conductivity of mortar, so that the heat insulation performance is improved, the polyphenyl coating layer formed in the preparation process of the polyphenyl coated vitrified microbeads can form an isolation layer in the mortar, the heat conduction and cold-hot bridge effect are reduced, the heat loss of the mortar can be effectively reduced, and the heat insulation performance is improved; meanwhile, the isolation layer has certain elasticity, and can absorb and reduce the expansion and contraction deformation of mortar caused by the influence of external natural conditions; the addition of hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate can promote the combination of the polyphenyl coating layer and the vitrified microbeads on one hand, can further improve the toughness, ductility and working performance of mortar on the other hand, is favorable for better filling fine gaps, and inhibits the generation and expansion of cracks and hollows, thereby enhancing the crack resistance.
Preferably, the composite fiber comprises plant fiber and polypropylene fiber with mass of 4-7:1.
Preferably, the plant fiber is prepared by the following method:
a. cleaning the collected stem and leaf of Eichhornia crassipes with root, oven drying, cutting, mechanically grinding, and sieving with 50-80 mesh sieve to obtain fine powder;
b. controlling the feed-liquid ratio to be 1:5-8, adding 0.3-0.5mol/L sodium hydroxide solution into the ground fine powder to soak for 1-2 hours, and then filtering, washing and drying to obtain the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing the alkaline hydrolysis eichhornia crassipes fiber, the epoxidized soybean oil and the silane coupling agent solution, performing ultrasonic treatment, and drying after the treatment is finished to obtain the required plant fiber.
Preferably, the mass ratio of the alkaline hydrolysis eichhornia crassipes fiber to the epoxidized soybean oil to the silane coupling agent solution is 1:0.2-0.4:8-10.
Preferably, the ultrasonic temperature is 60-70 ℃, the ultrasonic power is 30-50W, and the ultrasonic time is 30-40min.
Preferably, the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20-24, and the volume fraction of the ethanol solution is 55-75%.
Through the adoption of the technical scheme, the eichhornia crassipes is listed as malignant weeds, and is harmful to agriculture, water conservancy and environmental protection, the applicant carries out alkaline hydrolysis modification on the root of the eichhornia crassipes by adding a sodium hydroxide solution after mechanical grinding, and adds epoxy soybean oil and a silane coupling agent solution for blending modification, and the obtained plant fibers are used for filling mortar and can be uniformly distributed in the mortar so as to obviously enhance the overall toughness and cracking resistance of the mortar; the plant fiber prepared by the method has excellent surface activity and adhesiveness, can be well combined with organic and inorganic components in mortar raw materials, and improves the performance of the mortar.
The applicant adopts the combination of plant fiber and polypropylene fiber for reinforcing mortar, so that the production cost can be effectively reduced while the crack resistance of the mortar is improved; the crack resistance of the mortar can be further improved by controlling the dosage ratio of the plant fiber and the polypropylene fiber.
In a second aspect, the application provides a preparation method of environment-friendly anti-cracking thermal insulation mortar, which adopts the following technical scheme:
the preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, uniformly mixing 1/2-2/3 weight of Portland cement and 1/2-2/3 weight of water, then adding polyphenyl coated vitrified micro bubbles and silicon micro powder, uniformly mixing, and aging to obtain a premix A;
s3, uniformly mixing the residual Portland cement, the residual water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer, and aging to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Preferably, the mixing rotation speed in the steps S2 and S3 is 100-500r/min.
Preferably, the aging in step S2 specifically means: aging for 20-40min at room temperature; the aging in the step S3 specifically means: aging at room temperature for 10-20min.
In summary, the present application has the following beneficial effects:
according to the method, the polyphenyl coated vitrified microbeads are used as aggregate, so that the self weight of the mortar is reduced, the heat insulation performance and the mechanical performance of the mortar are improved, the waterproof performance and the crack resistance of the mortar are improved, and the expansion and shrinkage deformation of the mortar caused by the influence of external natural conditions are reduced; the vitrified microbeads have lower heat conductivity, and can reduce the heat conductivity of mortar, so that the heat insulation performance is improved, the polyphenyl coating layer formed in the preparation process of the polyphenyl coated vitrified microbeads can form an isolation layer in the mortar, the heat conduction and cold-hot bridge effect are reduced, the heat loss of the mortar can be effectively reduced, and the heat insulation performance is improved; meanwhile, the isolation layer has certain elasticity, and can absorb and reduce the expansion and contraction deformation of mortar caused by the influence of external natural conditions; the addition of hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate can promote the combination of the polyphenyl coating layer and the vitrified microbeads on one hand, can further improve the toughness, ductility and working performance of mortar on the other hand, is favorable for better filling fine gaps, and inhibits the generation and expansion of cracks and hollows, thereby enhancing the crack resistance.
According to the preparation method, the water hyacinth root is subjected to mechanical grinding and then added with sodium hydroxide solution for alkaline hydrolysis modification, and then added with epoxidized soybean oil and silane coupling agent solution for blending modification, so that the obtained plant fiber is used for filling mortar, and can be uniformly distributed in the mortar, so that the overall toughness and cracking resistance of the mortar are obviously enhanced; the plant fiber prepared by the method has excellent surface activity and adhesiveness, can be well combined with organic and inorganic components in mortar raw materials, and improves the performance of the mortar; the plant fiber and the polypropylene fiber are compounded to be used for reinforcing the mortar, so that the crack resistance of the mortar is improved, and meanwhile, the production cost can be effectively reduced; the crack resistance of the mortar can be further improved by controlling the dosage ratio of the plant fiber and the polypropylene fiber.
Detailed Description
The present application is described in further detail below with reference to examples.
Portland cement is ordinary Portland cement PO42.5, purchased from Lin Ya cement marketing Co., ltd;
the fly ash is secondary fly ash and is purchased from the coastal mineral product trade company of the Ministry of life;
the PS reclaimed material is flame-retardant PS reclaimed material, and is purchased from Shanghai Jiu trade company Limited;
the vitrified microbeads are vitrified microbeads with the granularity of 30-50 meshes and are purchased from the Ministry of mining of Yang Jinhua;
hydroxypropyl methylcellulose, available from eastern, along with chemical industry, inc;
sodium dodecyl benzene sulfonate, available from Shandong chemical Co., ltd;
epoxidized soybean oil available from Shandong chemical Co., ltd;
the aminosilane polymer is aminosilane polymer KH-1121, purchased from Nanjing Xuanhao new materials technology Co., ltd;
the polypropylene fiber is polypropylene net fiber, which is purchased from Shandong Hengyi New Material Co., ltd;
the particle size of the silicon micro powder is 325 meshes, and the silicon micro powder is purchased from Guangzhou Zhi Cheng New Material Co., ltd;
the polycarboxylic acid high-efficiency powder water reducer is polycarboxylic acid high-efficiency powder water reducer PC-1, and is purchased from Shanghai Kehong chemical industry Co., ltd;
the water accords with tap water specified in JGJ 63-2006 concrete water Standard.
Examples 1-3 provide an environment-friendly anti-cracking thermal insulation mortar and a preparation method thereof.
Example 1
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of polyphenyl coated vitrified micro bubbles, 6Kg of composite fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 20:50:3:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 215 ℃, the melt extrusion speed is controlled to be 500r/min, and the granulation particle size is 1mm, so that the polyphenyl coated vitrified microbeads are obtained;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 4:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 50-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.3mol/L sodium hydroxide solution into the ground fine powder, soaking for 2 hours, filtering, washing to be neutral, and drying at 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.2:8, performing ultrasonic treatment, controlling the ultrasonic temperature to be 60 ℃, the ultrasonic power to be 50W, and the ultrasonic time to be 30min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20, and the volume fraction of the ethanol solution is 75%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Example 2
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 600Kg of Portland cement, 150Kg of fly ash, 90Kg of polyphenyl coated vitrified micro bubbles, 11Kg of composite fiber, 15Kg of silica micropowder, 12Kg of polycarboxylic acid high-efficiency powder water reducer and 500Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to a mass ratio of 22:55:4:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 225 ℃, the melt extrusion rotating speed is controlled to be 400r/min, and the granulation particle size is 1.2mm, so that the polyphenyl coated vitrified microbeads are obtained;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 5.5:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 65-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:6.5, adding 0.4mol/L sodium hydroxide solution into the ground fine powder, soaking for 1.5 hours, filtering, washing to be neutral, and drying at the temperature of 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.3:9, performing ultrasonic treatment, controlling the ultrasonic temperature to be 65 ℃, the ultrasonic power to be 40W, the ultrasonic time to be 35min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:22, and the volume fraction of the ethanol solution is 65%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Example 3
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 640Kg of Portland cement, 160Kg of fly ash, 100Kg of polyphenyl coated vitrified micro bubbles, 16Kg of composite fiber, 18Kg of silica micropowder, 14Kg of polycarboxylic acid high-efficiency powder water reducer and 600Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 24:60:5:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 235 ℃, the melt extrusion rotating speed is controlled to be 300r/min, and the granulation particle size is 1.5mm, so that the polyphenyl coated vitrified microbeads are obtained;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 7:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 80-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.5mol/L sodium hydroxide solution into the ground fine powder, soaking for 1h, filtering, washing to be neutral, and drying at 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.4:10, performing ultrasonic treatment, controlling the ultrasonic temperature to be 70 ℃, the ultrasonic power to be 30W, the ultrasonic time to be 40min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:24, and the volume fraction of the ethanol solution is 75%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
In order to verify the overall properties of the anti-crack thermal insulation mortars prepared in examples 1 to 3 of the present application, the applicant set comparative examples 1 to 4, in particular as follows:
comparative example 1
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of mixed aggregate, 6Kg of composite fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein the mixed aggregate is prepared by uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 20:50:3:1;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 4:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 50-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.3mol/L sodium hydroxide solution into the ground fine powder, soaking for 2 hours, filtering, washing to be neutral, and drying at 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.2:8, performing ultrasonic treatment, controlling the ultrasonic temperature to be 60 ℃, the ultrasonic power to be 50W, and the ultrasonic time to be 30min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20, and the volume fraction of the ethanol solution is 75%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, mixed aggregate, composite fiber, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding mixed aggregate and silica micropowder to be continuously mixed for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Comparative example 2
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of polyphenyl coated vitrified micro bubbles, 6Kg of composite fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials and vitrified microbeads according to the mass ratio of 2:5, and then carrying out melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 215 ℃, the melt extrusion rotating speed is controlled to be 500r/min, and the granulation particle size is 1mm, so as to obtain polyphenyl coated vitrified microbeads;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 4:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 50-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.3mol/L sodium hydroxide solution into the ground fine powder, soaking for 2 hours, filtering, washing to be neutral, and drying at 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.2:8, performing ultrasonic treatment, controlling the ultrasonic temperature to be 60 ℃, the ultrasonic power to be 50W, and the ultrasonic time to be 30min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20, and the volume fraction of the ethanol solution is 75%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Comparative example 3
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of polyphenyl coated vitrified micro bubbles, 6Kg of plant fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 20:50:3:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 215 ℃, the melt extrusion speed is controlled to be 500r/min, and the granulation particle size is 1mm, so that the polyphenyl coated vitrified microbeads are obtained;
the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 50-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.3mol/L sodium hydroxide solution into the ground fine powder, soaking for 2 hours, filtering, washing to be neutral, and drying at 70 ℃ until the water content is 10%, thus obtaining the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing alkaline hydrolysis eichhornia crassipes fiber, epoxidized soybean oil and silane coupling agent solution according to a mass ratio of 1:0.2:8, performing ultrasonic treatment, controlling the ultrasonic temperature to be 60 ℃, the ultrasonic power to be 50W, and the ultrasonic time to be 30min, and drying after the treatment is completed to obtain the required plant fiber;
the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20, and the volume fraction of the ethanol solution is 75%.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, plant fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the plant fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Comparative example 4
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of polyphenyl coated vitrified micro bubbles, 6Kg of polypropylene fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 20:50:3:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 215 ℃, the melt extrusion speed is controlled to be 500r/min, and the granulation particle size is 1mm, so that the polyphenyl coated vitrified microbeads are obtained;
the preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, polypropylene fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the polypropylene fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Comparative example 5
An environment-friendly anti-cracking thermal insulation mortar comprises the following raw materials in parts by weight: 560Kg of Portland cement, 140Kg of fly ash, 80Kg of polyphenyl coated vitrified micro bubbles, 6Kg of composite fiber, 12Kg of silica micropowder, 10Kg of polycarboxylic acid high-efficiency powder water reducer and 400Kg of water;
wherein, the polyphenyl coated vitrified microbead is prepared by the following method:
uniformly mixing PS reclaimed materials, vitrified microbeads, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate according to the mass ratio of 20:50:3:1, and performing melt extrusion granulation, wherein the melt extrusion temperature is controlled to be 215 ℃, the melt extrusion speed is controlled to be 500r/min, and the granulation particle size is 1mm, so that the polyphenyl coated vitrified microbeads are obtained;
the composite fiber comprises plant fiber and polypropylene fiber with mass of 4:1; the plant fiber is prepared by the following method:
a. cleaning the collected stem leaves and the roots of the eichhornia crassipes, drying at 70 ℃ until the water content is 10%, cutting, mechanically grinding, and sieving with a 50-mesh sieve to obtain ground fine powder;
b. controlling the feed-liquid ratio to be 1:8, adding 0.3mol/L sodium hydroxide solution into the ground fine powder, soaking for 2 hours, filtering, washing to be neutral, and drying at the temperature of 70 ℃ until the water content is 10%, thus obtaining the required plant fiber.
The preparation method of the environment-friendly anti-cracking thermal insulation mortar comprises the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, controlling the mixing rotating speed to be 300r/min, mixing 1/2 weight of Portland cement and 1/2 weight of water for 10min to be uniformly mixed, adding polyphenyl coated vitrified micro bubbles and silicon micro powder, continuously mixing for 10min to be uniformly mixed, and aging for 20min at room temperature to obtain a premix A;
s3, controlling the mixing rotating speed to be 300r/min, mixing the rest silicate cement, the rest water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer for 10min until the mixture is uniformly mixed, and aging for 10min at room temperature to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
Performance detection
According to the test standard, the anti-cracking thermal insulation mortar prepared in the examples 1-3 and the comparative examples 1-5 are respectively poured into a test mold to prepare test samples, the test samples are covered by a plastic film, and are cured for three days in a mold under the conditions of 25 ℃ and 55% relative humidity, and then the test samples are continuously cured for 28 days after the mold is removed, and the properties of the test samples are respectively tested after the curing is completed.
According to the national standard GB/T20473-2021 building heat-insulating mortar, the compressive strength and softening coefficient of a test sample are tested, and the specification of the test sample is 70.7mmx70.7mmx70.7mm.
According to the national standard JC/T951-2005 method for testing crack resistance of cement mortar, the crack resistance of the test sample is tested, and the specification of the test sample is 910mmx600mmx20mm.
The test results are shown in Table 1 below:
as can be seen from the data shown in table 1: the anti-cracking thermal insulation mortar prepared in the embodiments 1-3 has high compressive strength, good cracking resistance and excellent comprehensive performance.
From the display data of example 1 and comparative example 1, it can be seen that: according to the embodiment 1, the polyphenyl coated vitrified micro bubbles are prepared in advance to be used as the aggregate, and compared with the aggregate directly added with the mixed aggregate consisting of PS reclaimed materials, vitrified micro bubbles, hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate, the crack resistance of the mortar can be remarkably improved, and the compressive strength is improved.
From the display data of example 1 and comparative example 2, it can be seen that: in the process of preparing the polyphenyl coated vitrified microbeads, the hydroxypropyl methylcellulose and sodium dodecyl benzene sulfonate are added, so that the combination of the polyphenyl coating layer and the vitrified microbeads can be promoted, the toughness, the ductility and the working performance of the mortar are further improved, and the anti-cracking performance and the compressive strength are enhanced.
From the data shown in example 1 and comparative examples 3-4, it can be seen that: in the embodiment 1 of the application, the plant fiber and the polypropylene fiber are compounded to be jointly used for reinforcing the mortar, and compared with the plant fiber or the polypropylene fiber which is independently used, the compressive strength of the mortar can be effectively ensured, the crack resistance of the mortar is improved, and meanwhile, the production cost is reduced.
From the display data of example 1 and comparative example 5, it can be seen that: in the preparation of plant fiber, the embodiment 1 of the application utilizes the epoxidized soybean oil and the silane coupling agent solution to jointly modify the alkaline hydrolysis eichhornia crassipes fiber, can further enhance the filling effect of the plant fiber, is used for filling mortar, can ensure uniform distribution in the mortar to obviously enhance the overall toughness and cracking resistance of the mortar, and can be well combined with organic and inorganic components in the raw materials of the mortar to improve the comprehensive performance of the mortar.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. The environment-friendly anti-cracking thermal insulation mortar is characterized by comprising the following raw materials in parts by weight: 560-640 parts of silicate cement, 140-160 parts of fly ash, 80-100 parts of polyphenyl coated vitrified micro bubbles, 6-16 parts of composite fibers, 12-18 parts of silica micropowder, 10-14 parts of polycarboxylic acid high-efficiency powder water reducer and 400-600 parts of water.
2. The environment-friendly anti-cracking thermal insulation mortar of claim 1, wherein the polyphenyl coated vitrified microbeads are prepared by the following method:
and uniformly mixing the PS reclaimed material, the vitrified microbeads, the hydroxypropyl methylcellulose and the sodium dodecyl benzene sulfonate, and performing melt extrusion granulation to obtain the polyphenyl coated vitrified microbeads.
3. The environment-friendly anti-cracking thermal insulation mortar as claimed in claim 2, wherein the mass ratio of the PS reclaimed material to the vitrified micro bubbles to the hydroxypropyl methylcellulose to the sodium dodecyl benzene sulfonate is 20-24:50-60:3-5:1.
4. The environment-friendly anti-cracking thermal insulation mortar as claimed in claim 2, wherein the melting extrusion temperature is 215-235 ℃, the melting extrusion rotating speed is 300-500r/min, and the granulating particle size is 1-1.5mm.
5. The environment-friendly anti-cracking thermal insulation mortar of claim 1, wherein the composite fiber comprises plant fiber and polypropylene fiber with mass of 4-7:1.
6. The environment-friendly anti-cracking thermal insulation mortar of claim 5, wherein the plant fiber is prepared by the following method:
a. cleaning the collected stem and leaf of Eichhornia crassipes with root, oven drying, cutting, mechanically grinding, and sieving with 50-80 mesh sieve to obtain fine powder;
b. controlling the feed-liquid ratio to be 1:5-8, adding 0.3-0.5mol/L sodium hydroxide solution into the ground fine powder to soak for 1-2 hours, and then filtering, washing and drying to obtain the alkaline hydrolysis eichhornia crassipes fiber;
c. mixing the alkaline hydrolysis eichhornia crassipes fiber, the epoxidized soybean oil and the silane coupling agent solution, performing ultrasonic treatment, and drying after the treatment is finished to obtain the required plant fiber.
7. The environment-friendly anti-cracking thermal insulation mortar of claim 6, wherein the mass ratio of the alkaline hydrolysis eichhornia crassipes fiber to the epoxy soybean oil to the silane coupling agent solution is 1:0.2-0.4:8-10.
8. The environment-friendly anti-cracking thermal insulation mortar according to claim 6, wherein the ultrasonic temperature is 60-70 ℃, the ultrasonic power is 30-50W, and the ultrasonic time is 30-40min.
9. The environment-friendly anti-cracking thermal insulation mortar as claimed in claim 6, wherein the silane coupling agent solution is prepared by compounding an aminosilane polymer and an ethanol solution in a mass ratio of 1:20-24, and the volume fraction of the ethanol solution is 55-75%.
10. A method for preparing the environment-friendly anti-cracking thermal insulation mortar according to any one of claims 1-9, comprising the following preparation steps:
s1, weighing raw materials including Portland cement, fly ash, polyphenyl coated vitrified micro bubbles, composite fibers, silica micropowder, polycarboxylic acid high-efficiency powder water reducer and water for later use according to parts by weight;
s2, uniformly mixing 1/2-2/3 weight of Portland cement and 1/2-2/3 weight of water, then adding polyphenyl coated vitrified micro bubbles and silicon micro powder, uniformly mixing, and aging to obtain a premix A;
s3, uniformly mixing the residual Portland cement, the residual water, the fly ash, the composite fiber and the polycarboxylic acid high-efficiency powder water reducer, and aging to obtain a premix B;
s4, uniformly mixing the premix A and the premix B to obtain the required anti-cracking thermal insulation mortar.
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