CN114671659B - Waterproof anti-cracking environment-friendly mortar and preparation method thereof - Google Patents
Waterproof anti-cracking environment-friendly mortar and preparation method thereof Download PDFInfo
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
- 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
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- 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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The application relates to the technical field of mortar building materials, and particularly discloses a preparation method of waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 300-320 parts of cement, 5-8 parts of waterproof modifier, 2-5 parts of polypropylene fiber, 1-3 parts of wood fiber, 50-60 parts of modified kaolin, 0.5-1 part of polycarboxylic acid high-efficiency water reducer, 0.05-0.15 part of cellulose ether, 2-5 parts of glass bead and 220-250 parts of water. The application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, the preparation method is simple, the preparation conditions are mild, the synergistic effect among the raw materials is effectively improved by adopting reasonable raw material collocation and reasonable preparation procedures, the raw materials and the proportion of the cement mortar are optimized to the maximum extent, the waterproof anti-cracking capability of the cement mortar is enhanced, and the requirements of the social market are met.
Description
Technical Field
The application relates to the technical field of mortar building materials, in particular to waterproof anti-cracking environment-friendly mortar and a preparation method thereof.
Background
With the rapid development of Chinese economy, infrastructure engineering is rapidly going on, and then the development of concrete is driven, so that the demand of concrete is gradually increased year by year. The annual output of the concrete in China is far more than 7 billion cubic meters in all years in 2011, so that the large industrial demand provides a powerful guarantee for the development of the modified concrete, and simultaneously, new problems of researches on the workability, the strength, the physical properties, the durability and the like of the modified concrete are brought.
The cement mortar belongs to a porous structure heterogeneous brittle material, and has the defects of large brittleness, low tensile-compression strength ratio, large shrinkage deformation, low elongation, poor crack resistance, poor waterproof and anti-permeability performance and the like in the hardening process, so that the application of the cement mortar is limited to a great extent.
Therefore, the modification of cement mortar is an effective method, and the modified cement mortar has attracted much attention due to better anti-permeability performance and smaller elastic modulus. Based on the above, the application provides a waterproof anti-cracking environment-friendly mortar and a preparation method thereof.
Disclosure of Invention
In order to improve the waterproof and anti-cracking capacity of the mortar, the waterproof and anti-cracking environment-friendly mortar and the preparation method thereof are provided, by adopting reasonable raw material collocation and reasonable preparation procedures, the synergistic effect among the raw materials is effectively improved, the raw materials and the proportion of the cement mortar are optimized to the greatest extent, the waterproof and anti-cracking capacity of the cement mortar is enhanced, and the requirements of the social market are met.
In a first aspect, the application provides a waterproof anti-crack environment-friendly mortar, which adopts the following technical scheme:
the waterproof anti-cracking environment-friendly mortar comprises the following raw materials in parts by weight: 300-320 parts of cement, 5-8 parts of waterproof modifier, 2-5 parts of polypropylene fiber, 1-3 parts of wood fiber, 50-60 parts of modified kaolin, 0.5-1 part of polycarboxylic acid high-efficiency water reducer, 0.05-0.15 part of cellulose ether, 2-5 parts of glass microsphere and 220-250 parts of water.
Preferably, the cement is ordinary portland cement p.o 42.5.
Preferably, the waterproof modifier comprises the following components in parts by weight of 1:1-2 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560).
The invention adopts epoxy silane WD-60 and gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane (KH 560) composite organosilicon waterproofing agent with active function to modify cement mortar, the organosilicon waterproofing agent is a material which consists of Si-O bonds and has the performance of inorganic material and organic material, and the modified cement mortar prepared by the technical scheme has excellent waterproof and anti-cracking performance.
Furthermore, the application adopts a mode of modifying the cement-based material by doping, and the organosilicon material can be uniformly distributed in the internal pores of the cement mortar, so that a better waterproof effect can be achieved.
Preferably, the chopped length of the wood fiber is 10-20mm, and the chopped length of the polypropylene fiber is 10-15mm.
The preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 600-750 deg.C at a temperature of 15-30 deg.C/min, and maintaining at 600-750 deg.C for 4-5h;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 3-5 h, washing, drying at 60-100 ℃, and crushing through a 150-mesh screen.
By adopting the technical scheme, the kaolin is subjected to acidification modification after calcination, and hydrogen bonds between layers of the kaolin are broken in the calcination process, so that part of groups on the inner layer of the original crystal are exposed, the types and the number of surface active points are increased, and the reaction activity is increased.
In addition, the specific surface area of the product, namely the interparticle pores, can be determined by adjusting the temperature rise speed of kaolin calcination. The selection of calcination condition and acidizing condition can effectively increase the space between the kaolin in this application, and this just makes and can effectively be connected each batching of mortar when mixing with cement mortar, improves its anti-cracking performance greatly.
Preferably, the viscosity of the cellulose ether is from 10000 to 20000mpa.s.
Preferably, the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
By adopting the technical scheme, a bridge structure can be formed among the mortar raw materials by selecting the specific cellulose ether material and the viscosity value, so that the raw materials are further closely connected and combined.
Preferably, the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2-3.
Preferably, the glass microspheres have an average particle size of 70 to 100 mesh.
In a second aspect, the application also provides a preparation method of the waterproof anti-crack environment-friendly mortar, which adopts the following technical scheme:
a preparation method of waterproof anti-cracking environment-friendly mortar specifically comprises the following preparation steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar
By adopting the technical scheme, the polypropylene fiber, the wood fiber, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads are dispersed, so that the uniform mixing of auxiliary materials is ensured; and then adding cement and water for premixing, and finally adding a waterproof modifier for final mixing with the modified kaolin, so that the rapid mixing and aggregation of the components of the raw materials are effectively ensured, the waterproof and anti-cracking performance of the cement mortar is effectively enhanced, and the quality of the material is fully improved.
In summary, the present application has the following beneficial effects:
according to the application, cement is used as a main component, materials such as fibers and cellulose ether are used for compatibility, and a waterproof modifier and modified kaolin are added to optimize the performance of the materials, so that the cost is reduced, and the manufacturing cost and the manufacturing time can be effectively reduced; on the basis, the waterproof and anti-cracking performance of the cement mortar is also obviously improved; the raw materials are scientific and reasonable in selection, the preparation method is simple, the preparation cost is low, and the obtained cement mortar is excellent in performance and can be widely applied.
Detailed Description
The present application is further illustrated with reference to specific examples.
Example 1
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 310 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 55 parts of modified kaolin, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight: 1.5 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber short-cut length is 15mm, and the polypropylene fiber short-cut length is 13mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 700 ℃, wherein the heating rate is 20 ℃/min in the calcining process, and keeping for 4.5h after heating to 700 ℃;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 4h, washing, drying at 80 ℃, crushing and screening by using a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain diameter of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Example 2
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 300 parts of cement, 5 parts of waterproof modifier, 2 parts of polypropylene fiber, 1 part of wood fiber, 50 parts of modified kaolin, 0.5 part of polycarboxylic acid high-efficiency water reducer, 0.05 part of cellulose ether, 2 parts of glass microsphere and 220 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight of 1:1 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber is chopped into 10mm in length, and the polypropylene fiber is chopped into 10mm in length;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at the temperature of 600 ℃, wherein the heating speed is 15 ℃/min in the calcining process, and keeping for 4h after heating to 600 ℃;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 3h, washing, drying at 60 ℃, crushing and screening by a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 10000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.
the average grain size of the glass beads is 70 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass microspheres in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Example 3
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 320 parts of cement, 8 parts of waterproof modifier, 5 parts of polypropylene fiber, 3 parts of wood fiber, 60 parts of modified kaolin, 1 part of polycarboxylic acid high-efficiency water reducing agent, 0.15 part of cellulose ether, 5 parts of glass microsphere and 250 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight: 2 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber short-cut length is 20mm, and the polypropylene fiber short-cut length is 15mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 750 ℃, wherein the heating rate is 30 ℃/min in the calcining process, and keeping for 5h after heating to 750 ℃;
(2) Putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 5h, washing, drying at 100 ℃, crushing and screening by a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 20000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:3.
the average grain diameter of the glass beads is 100 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Example 4
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 300 parts of cement, 8 parts of waterproof modifier, 5 parts of polypropylene fiber, 3 parts of wood fiber, 50 parts of modified kaolin, 1 part of polycarboxylic acid high-efficiency water reducing agent, 0.15 part of cellulose ether, 5 parts of glass microsphere and 250 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight of 1:1.5 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber chopped length is 20mm, and the polypropylene fiber chopped length is 10mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 600 deg.C at a temperature of 30 deg.C/min to 600-deg.C for 4h;
(2) Putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 5h, washing, drying at 100 ℃, crushing and screening by a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 20000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.
the average grain diameter of the glass beads is 100 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Example 5
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 310 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 60 parts of modified kaolin, 1 part of polycarboxylic acid high-efficiency water reducing agent, 0.15 part of cellulose ether, 5 parts of glass microsphere and 250 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight: 1.5 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber chopped length is 20mm, and the polypropylene fiber chopped length is 10mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 750 deg.C at a temperature of 30 deg.C/min for 4-5h after heating to 750 deg.C;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 3h, washing, drying at 60 ℃, crushing and screening by a 150-mesh screen.
Wherein the cellulose ether has a viscosity of 10000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.
the average grain diameter of the glass beads is 70 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Comparative example 1
The application provides a waterproof anti-cracking environment-friendly mortar which comprises the following raw materials in parts by weight: 310 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 55 parts of modified kaolin, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier is epoxy silane WD-60;
the wood fiber short-cut length is 15mm, and the polypropylene fiber short-cut length is 13mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 700 ℃, wherein the heating rate is 20 ℃/min in the calcining process, and keeping for 4.5h after heating to 700 ℃;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 4h, washing, drying at 80 ℃, crushing and screening by using a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain diameter of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Comparative example 2
The application provides a waterproof anti-cracking environment-friendly mortar which comprises the following raw materials in parts by weight: 310 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 55 parts of modified kaolin, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier is a mixture of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane (KH 560);
the wood fiber short-cut length is 15mm, and the polypropylene fiber short-cut length is 13mm;
the preparation method of the modified kaolin comprises the following steps:
(1) Calcining kaolin at 700 ℃, wherein the temperature rise speed is 20 ℃/min in the calcining process, and keeping for 4.5h after the temperature rises to 700 ℃;
(2) And (2) putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 4h, washing, drying at 80 ℃, crushing and screening by using a 150-mesh screen.
Wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain size of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar. Comparative example 3
The application provides a waterproof anti-cracking environment-friendly mortar which comprises the following raw materials in parts by weight: 310 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 55 parts of modified kaolin, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight: 1.5 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber is chopped into 15mm, and the polypropylene fiber is chopped into 13mm;
the preparation method of the modified kaolin comprises the following steps:
calcining kaolin at 700 ℃, wherein the heating rate is 20 ℃/min in the calcining process, and keeping for 4.5h after heating to 700 ℃; pulverizing and sieving with 150 mesh sieve.
Wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain size of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass microspheres in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar.
Comparative example 4
The application provides a waterproof anti-cracking environment-friendly mortar, which comprises the following raw materials in parts by weight: 365 parts of cement, 6 parts of waterproof modifier, 3 parts of polypropylene fiber, 2 parts of wood fiber, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the waterproof modifier comprises the following components in parts by weight of 1:1.5 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the wood fiber is chopped into 15mm, and the polypropylene fiber is chopped into 13mm;
wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain size of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar.
Comparative example 5
The application provides a waterproof anti-cracking environment-friendly mortar which comprises the following raw materials in parts by weight: 316 parts of cement, 3 parts of polypropylene fiber, 2 parts of wood fiber, 55 parts of modified kaolin, 0.7 part of polycarboxylic acid high-efficiency water reducing agent, 0.1 part of cellulose ether, 4 parts of glass microsphere and 240 parts of water;
wherein the cement is ordinary portland cement P.O 42.5;
the wood fiber is chopped into 15mm, and the polypropylene fiber is chopped into 13mm;
the preparation method of the modified kaolin comprises the following steps:
calcining kaolin at 700 ℃, wherein the heating rate is 20 ℃/min in the calcining process, and keeping for 4.5h after heating to 700 ℃; pulverizing and sieving with 150 mesh sieve.
Wherein the viscosity of the cellulose ether is 15000mPa.s; the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether; the weight part ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether is 1:2.5.
the average grain diameter of the glass beads is 80 meshes;
the application also provides a preparation method of the waterproof anti-cracking environment-friendly mortar, which comprises the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass microspheres in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar.
Performance testing
In order to verify the performance of the waterproof anti-cracking environment-friendly mortar prepared in the embodiments 1 to 5 of the present application, the applicant conducted the following tests:
the relevant test tests were carried out on the above examples and comparative examples according to the corresponding method in the Roche JC/T984-2011, wherein examples 1-5 gave the test results shown in Table 1 below:
table 1:
comparative examples 1-5 gave test results as shown in table 2 below:
table 2:
as can be seen from tables 1 and 2: the performance of the cement mortars prepared in examples 1-5 of the present application is significantly improved compared to the overall performance of the cement mortars prepared in comparative examples 1-5.
Compared with example 1, the waterproof modifier in comparative example 1 is epoxy silane WD-60; the waterproof modifier in the comparative example 2 is a mixture of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane (KH 560); in comparative example 3, the kaolin was not acidified; the cement mortar raw material in comparative example 4 did not contain modified kaolin; the cement mortar raw material in comparative example 5 does not contain a waterproof modifier, and the modified kaolin is not subjected to acidification modification; the test result shows that: the mortar of the comparative examples had an extended initial setting time and an extended final setting time, and the mortar bond strengths were reduced for 7 days and 28 days. The water absorption values and shrinkage values in comparative examples 1 to 3 did not change significantly, while those in comparative examples 4 to 5 were both increased to some extent, and alkali resistance and heat resistance were also decreased to some extent.
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 (8)
1. The waterproof anti-cracking environment-friendly mortar is characterized by comprising the following raw materials in parts by weight: 300-320 parts of cement, 5-8 parts of waterproof modifier, 2-5 parts of polypropylene fiber, 1-3 parts of wood fiber, 50-60 parts of modified kaolin, 0.5-1 part of polycarboxylic acid high-efficiency water reducer, 0.05-0.15 part of cellulose ether, 2-5 parts of glass microsphere and 220-250 parts of water;
the waterproof modifier comprises the following components in parts by weight: 1-2 of a mixture of epoxysilane WD-60 and gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560);
the preparation method of the modified kaolin comprises the following steps: (1) Calcining kaolin at 600-750 deg.C at a temperature of 15-30 deg.C/min, and maintaining at 600-750 deg.C for 4-5h; (2) Putting the kaolin prepared in the step (1) into 98% sulfuric acid, stirring and emulsifying for 3-5 h, washing, drying at 60-100 ℃, crushing and screening by a 150-mesh screen.
2. The waterproof anti-cracking environment-friendly mortar according to claim 1, wherein the cement is ordinary portland cement P.O 42.5.
3. The waterproof anti-cracking environment-friendly mortar according to claim 1, wherein the chopped length of the wood fiber is 10-20mm, and the chopped length of the polypropylene fiber is 10-15mm.
4. The waterproof anti-cracking environment-friendly mortar according to claim 1, wherein the viscosity of the cellulose ether is 10000-20000mPa.s.
5. The waterproof, anti-cracking and environment-friendly mortar of claim 1, wherein the cellulose ether is a mixture of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
6. The waterproof anti-cracking environment-friendly mortar of claim 5, wherein the ratio of the hydroxyethyl methyl cellulose ether to the hydroxypropyl methyl cellulose ether in parts by weight is 1:2-3.
7. The waterproof anti-cracking environment-friendly mortar according to any one of claims 1, wherein the average particle size of the glass beads is 70-100 mesh.
8. The preparation method of the waterproof anti-crack environment-friendly mortar according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, weighing a waterproof modifier, polypropylene fibers, wood fibers, modified kaolin, a polycarboxylic acid high-efficiency water reducing agent, cellulose ether and glass beads in parts by weight for later use;
s2, putting the polypropylene fibers, the wood fibers, the polycarboxylic acid high-efficiency water reducing agent, the cellulose ether and the glass beads in the step S1 into a mixer for mixing;
s3: weighing cement according to a ratio, putting the cement into a mixer, and uniformly mixing to obtain a dry mixture; and adding a waterproof modifier and modified kaolin into the dry mixture, and finally adding water to obtain the anti-cracking waterproof mortar.
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| JP4787187B2 (en) * | 2007-02-22 | 2011-10-05 | 電気化学工業株式会社 | Rapid hardened mortar and repair method using the same |
| CN101195529A (en) * | 2007-12-17 | 2008-06-11 | 重庆大学 | Heat preserving crack resistant mortar for exterior wall |
| CN105084841A (en) * | 2015-09-17 | 2015-11-25 | 东莞市东润建筑材料有限公司 | Light anti-cracking plastering mortar |
| CN107162532A (en) * | 2017-07-05 | 2017-09-15 | 合肥市片叶装饰工程有限公司 | A kind of water proof anti-seepage anticracking grout and preparation method thereof |
| CN111233394A (en) * | 2020-01-17 | 2020-06-05 | 重庆华西易通建设股份有限公司 | Prefabricated building reserved joint sealing dry-mixed plastering mortar and preparation method thereof |
| CN113683364A (en) * | 2021-09-06 | 2021-11-23 | 宁波森泰新材料有限公司 | Flexible anti-cracking waterproof mortar and production method thereof |
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