CN113402240A - Super anti-cracking rapid repair material and preparation method thereof - Google Patents
Super anti-cracking rapid repair material 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
- C04B28/06—Aluminous 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2623—Polyvinylalcohols; Polyvinylacetates
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building 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
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
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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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a super anti-cracking rapid repair material and a preparation method thereof, and relates to the technical field of building repair materials. The preparation method of the repair material comprises the following steps: putting the weighed acid salt cement, ordinary portland cement, an early strength agent, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash and quartz sand into a stirrer, adding a composite efficient expanding agent, stirring at a low speed for 5min to obtain uniform powder, finally adding the diluted acrylic emulsion, and stirring to obtain a finished product. The invention solves the problems of slow solidification, early strength and easy cracking of the existing repairing material, reduces the generation of micro cracks in the matrix, improves the compactness of the matrix, improves the toughness in the material, disperses stress concentration, reduces the generation and expansion of internal micro cracks, has a more compact structure and higher strength, resists crack expansion, and ensures that the material has excellent cracking resistance and early strength, and the later strength is continuously developed.
Description
Technical Field
The invention relates to the technical field of building repair materials, in particular to a super anti-cracking rapid repair material and a preparation method thereof.
Background
Concrete pavement refers to a pavement that is surfaced with a slab of cement concrete. The concrete pavement structure is a pavement structure which is formed by taking a concrete slab as a surface course and arranging a base course and a cushion course under the concrete slab, and is also called as a rigid pavement. The main material of the surface layer is concrete, and generally requires wear resistance, smoothness, skid resistance, high strength and the like.
The cushion layer is arranged on a road with uncomfortable temperature and humidity, the aim is to change the structure of the road surface, and the base layer has the characteristics of strong deformation resistance, compression resistance, scouring resistance, firmness and the like. The concrete pavement is repeatedly rolled when vehicles come and go every day, and is easy to damage particularly when the truck with the overweight is carried, so that the concrete pavement needs to be repaired at the moment.
When the road is repaired, the concrete tank truck is generally used for conveying the concrete to the position where the road is required to be repaired, the concrete is unloaded into the cleaned pit slot, the concrete tank truck is used for pouring, and the operation of pouring the concrete is completed at one time.
At present, Chinese patent with publication number CN108328986B discloses a pavement repair material, which comprises the following raw materials in parts by weight: 2.3-3.7 parts of polymethyl methacrylate, 0.3-2.2 parts of tetraalkoxysilane, 0.3-0.7 part of carbamate, 0.4-1.5 parts of pigment, 0.5-1.2 parts of curing agent, 5-9 parts of toughening agent, 0.5-1.5 parts of Portland cement, 0.5-2.4 parts of water reducing agent, 4-9 parts of metal fiber, 0.4-1.5 parts of ceramic particles and 2-5 parts of microcrystalline stone.
The pavement repairing material improves the bonding strength of the joint, prevents the repairing block from being separated from the original pavement to a certain extent, and has the problems of low solidification speed, insufficient early strength, general later strength and easy cracking when the pavement repairing material is used.
Disclosure of Invention
Aiming at the technical problems, the invention overcomes the defects of the prior art and provides a super anti-crack rapid repair material and a preparation method thereof.
In order to solve the technical problems, the invention provides a super anti-cracking rapid repair material and a preparation method thereof.
The technical effects are as follows: the problems that the existing repair material is slow in solidification, high in early strength and easy to crack are solved, the generation of micro cracks in a matrix is reduced, the compactness of the matrix is improved, the toughness in the material is improved, stress concentration is dispersed, the generation and expansion of internal micro cracks are reduced, the structure is more compact, the strength is higher, crack expansion is blocked, the material is guaranteed to have excellent crack resistance and high early strength, and the later strength is continuously developed.
The technical scheme of the invention is further defined as follows:
a preparation method of a super anti-crack rapid repair material comprises the following steps:
s1: respectively weighing a certain amount of lead acid salt cement, ordinary portland cement, an early strength agent, a retarder, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash, acrylic emulsion, quartz sand and water, wherein the materials are used for later use;
s2: putting the weighed acid salt cement, ordinary portland cement, an early strength agent, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash and quartz sand into a stirrer, adding a composite efficient expanding agent, and stirring at a low speed for 5min to obtain uniform powder;
s3: mixing acrylic emulsion and water according to the proportion of 1:4 and stirring to obtain diluted emulsion;
s4: adding the diluted emulsion prepared in the step S3 into the uniform powder prepared in the step S2, and stirring slowly for 1min and then quickly for 1min to obtain a finished product of the quick repairing material;
wherein the composite high-efficiency expanding agent is prepared by stirring, mixing and grinding a certain amount of anhydrous calcium sulphoaluminate, calcium oxide, anhydrite and pentanediol.
Further, the composite efficient expanding agent comprises the following components in percentage by mass:
anhydrous calcium sulphoaluminate, calcium oxide, anhydrite, pentanediol, 1:0.1:0.15: 0.05;
mixing and stirring the anhydrous calcium sulphoaluminate, the calcium oxide, the anhydrite and the pentanediol according to the mass ratio, and grinding the mixture into particles with the mesh number of more than or equal to 800 meshes to obtain the composite efficient expanding agent.
The super anti-crack rapid repair material and the preparation method thereof have the advantages that S1 comprises the following material components:
30-35 parts of aluminate cement
8-12 parts of ordinary portland cement
0.02-0.2 part of early strength agent
0.3-0.5 part of retarder
3-6 parts of composite efficient expansion
0.2-0.5 part of water reducing agent
0.3-0.6 part of rubber powder
0.03 to 0.06 portion of defoaming agent
3-5 parts of silica fume
2-3 parts of fly ash
2-3 parts of acrylic emulsion
42-55 parts of quartz sand.
When the materials are stirred at low speed in S2 and S4, the revolution speed of the stirring blades is 62r/min, the maximum allowable error is +/-5 r/min, the rotation speed of the stirring blades is 140r/min, and the maximum allowable error is +/-5 r/min; during rapid stirring, the revolution speed of the stirring blades is 125r/min, the maximum allowable error is +/-10 r/min, the rotation speed of the stirring blades is 285r/min, and the maximum allowable error is +/-10 r/min.
The aluminate cement is 625 type aluminate cement, the ordinary portland cement is ordinary portland cement 525 or 425 ordinary portland cement, the early strength agent is lithium sulfate or lithium carbonate, and the retarder is superfine tartaric acid.
The super anti-cracking rapid repair material and the preparation method thereof have the advantages that the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the powder rubber powder is an ethylene-vinyl acetate copolymer.
The defoaming agent is one or more of polyether high-efficiency defoaming agent, organic silicon defoaming agent or mineral oil defoaming agent.
The superfine silicon micro-powder is the superfine silicon micro-powder with the mesh number of more than or equal to 1200 meshes.
The super anti-cracking rapid repair material and the preparation method thereof are characterized in that the fly ash is first-grade original fly ash, the emulsion is acrylic emulsion, and the mesh number of the quartz sand is 70-140 meshes.
The invention has the beneficial effects that:
(1) in the invention, the performance of the material is enhanced by adding the composite high-efficiency expanding agent, and the composite high-efficiency expanding agent is prepared by taking anhydrous calcium sulphoaluminate and calcium oxide as main minerals, adding a proper amount of anhydrite and a proper amount of pentanediol and grinding; after adding the composite efficient expanding agent, firstly, the anhydrous calcium sulphoaluminate, the anhydrite and the cement mineral phase react to generate expansive ettringite crystals, in particular to C with higher activity in the ordinary portland cement3A with C of sulphoaluminate cement4A3 
In rich SO42-Rapidly reacting to generate expansive ettringite crystals in the state; then, calcium oxide forms a gel state between cement particles at the initial stage of cement hydrationCalcium hydroxide, which is recrystallized to produce swelling; finally, the surface tension of water is reduced by the pentanediol, the pressure of the water in the capillary pores is reduced, and meanwhile, the hydration heat is reduced by the pentanediol, so that the hydration reaction rate is slightly slowed, and the generation of internal stress is reduced;
(2) the invention has excellent early strength performance, and the aluminate cement and the ordinary portland cement have excellent early strength performance after being mixed, which is mainly because the portland cement generates a hydration product Ca (OH) after being hydrated2Hydration product CAH of aluminate cement10And C2AH8And AH3Gel meets Ca (OH)2Is immediately converted into C3AH6Rapidly develop strength due to Ca (OH)2Consumption of, C in Portland Cement3S and C2The hydration reaction of S is accelerated, the hydration of ordinary silicon is greatly accelerated, and the early strength of the material is higher;
(3) the invention has excellent later strength, the fly ash and the micro silicon powder can fill gaps of cement particles to generate gel with hydration products, the later strength of the material is improved, simultaneously, the compactness of the material is further improved, and the impermeability of the material is improved;
(4) the invention also has excellent anti-cracking performance and the function of high-efficiency composite expanding agent, reduces the generation of micro-cracks in the matrix and simultaneously improves the compactness of the matrix; the ethylene-vinyl acetate copolymer rubber powder and the acrylic emulsion form a waterproof film-shaped structure which is uniformly distributed and mutually adhered in the system, so that the toughness in the material is improved, stress concentration is dispersed, and the generation and expansion of internal fine cracks are reduced; the fly ash and the ultrafine silicon powder are filled among cement particles, and the gel generated by later hydration fills the internal pores, so that the structure is more compact, the strength is higher, and the crack expansion is hindered;
(5) the invention solves the problems of slow solidification, early strength and easy cracking of the existing repairing material, reduces the generation of micro cracks in the matrix, improves the compactness of the matrix, improves the toughness in the material, disperses stress concentration, reduces the generation and expansion of internal micro cracks, has a more compact structure and higher strength, resists crack expansion, and ensures that the material has excellent cracking resistance and early strength, and the later strength is continuously developed.
Detailed Description
The super anti-crack rapid repair material and the preparation method thereof provided by the embodiment comprise the following steps:
s1: respectively weighing a certain amount of lead acid salt cement, ordinary portland cement, an early strength agent, a retarder, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash, acrylic emulsion, quartz sand and water, wherein the materials are used for later use;
s2: putting the weighed acid salt cement, ordinary portland cement, an early strength agent, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash and quartz sand into a stirrer, adding a composite efficient expanding agent, and stirring at a low speed for 5min to obtain uniform powder;
s3: mixing acrylic emulsion and water according to the proportion of 1:4 and stirring to obtain diluted emulsion;
s4: adding the diluted emulsion prepared in the step S3 into the uniform powder prepared in the step S2, and stirring slowly for 1min and then quickly for 1min to obtain a finished product of the quick repairing material;
wherein the composite high-efficiency expanding agent is prepared by stirring, mixing and grinding a certain amount of anhydrous calcium sulphoaluminate, calcium oxide, anhydrite and pentanediol. The composite efficient expanding agent comprises the following components in percentage by mass:
anhydrous calcium sulphoaluminate, calcium oxide, anhydrite, pentanediol, 1:0.1:0.15: 0.05.
The preparation method comprises the following steps: mixing and stirring the anhydrous calcium sulphoaluminate, the calcium oxide, the anhydrite and the pentanediol according to the mass ratio, and grinding the mixture into particles with the mesh number of more than or equal to 800 meshes to obtain the composite efficient expanding agent.
The S1 comprises the following material components:
30-35 parts of aluminate cement
8-12 parts of ordinary portland cement
0.02-0.2 part of early strength agent
0.3-0.5 part of retarder
3-6 parts of composite efficient expansion
0.2-0.5 part of water reducing agent
0.3-0.6 part of rubber powder
0.03 to 0.06 portion of defoaming agent
3-5 parts of silica fume
2-3 parts of fly ash
2-3 parts of acrylic emulsion
42-55 parts of quartz sand.
Wherein the aluminate cement is 625 type aluminate cement, the ordinary portland cement is ordinary portland cement 525 cement or ordinary portland cement 425 cement, the early strength agent is lithium sulfate or lithium carbonate, and the retarder is superfine tartaric acid. The water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the powder rubber powder is an ethylene-vinyl acetate copolymer. The defoaming agent is one or more of polyether high-efficiency defoaming agent, organic silicon defoaming agent or mineral oil defoaming agent. The micro silicon powder is superfine micro silicon powder with the mesh number of more than or equal to 1200 meshes. The fly ash is first-grade undisturbed fly ash, the emulsion is acrylic emulsion, and the mesh number of the quartz sand is 70-140 meshes.
When the stirring is carried out at low speed in S2 and S4, the revolution speed of the stirring blades is 62r/min, the maximum allowable error is +/-5 r/min, the rotation speed of the stirring blades is 140r/min, and the maximum allowable error is +/-5 r/min; during rapid stirring, the revolution speed of the stirring blades is 125r/min, the maximum allowable error is +/-10 r/min, the rotation speed of the stirring blades is 285r/min, and the maximum allowable error is +/-10 r/min.
In order to compare the difference between the rapid repair material prepared by the method and the common repair material and other rapid repair materials on the market, the performance detection of two groups of examples and two groups of comparative examples is carried out, and a comparison table is obtained.
The following parts of the material components in examples 1, S1 and S2 are taken in parts by weight:
aluminate cement 35 portions
Ordinary Portland cement 8 parts
0.05 part of early strength agent
0.3 part of retarder
Composite high-efficiency expansion 4 portions
0.5 part of water reducing agent
0.6 part of rubber powder
0.05 part of defoaming agent
Micro silicon powder 3 parts
2 portions of fly ash
Acrylic emulsion 3 parts
43.5 parts of quartz sand
12 parts of water.
In example 2, the following material components in S1 and S2 in parts by weight:
30 portions of aluminate cement
Ordinary Portland cement 12 parts
0.05 part of early strength agent
0.5 part of retarder
Composite high-efficiency expansion 4 portions
0.5 part of water reducing agent
0.6 part of rubber powder
0.05 part of defoaming agent
Silica fume 5 parts
2 portions of fly ash
Acrylic emulsion 3 parts
42.3 parts of quartz sand
12 parts of water.
Comparative example 1, in order to verify the effect of the composite high-efficiency expanding agent on the cracking resistance of the material, the components in comparative example 1 were the same as those in example 1 except that the composite high-efficiency expanding agent was not added and replaced with the same amount of quartz sand. The concrete components are as follows:
aluminate cement 35 portions
Ordinary Portland cement 8 parts
0.05 part of early strength agent
0.3 part of retarder
0.5 part of water reducing agent
0.6 part of rubber powder
0.05 part of defoaming agent
Micro silicon powder 3 parts
2 portions of fly ash
Acrylic emulsion 3 parts
47.5 parts of quartz sand
12 parts of water.
Example 1, example 2 and comparative example 1 the preparation conditions and preparation method were the same except for the component ratios.
And 2, taking a certain brand of high-strength non-shrink repair material commonly used in the market as a comparative example 2, wherein the material is widely applied to rush repair engineering of municipal pavements.
And (3) performance detection:
the setting time, the compressive and flexural strength of 2h and 28d, and the crack resistance of the above examples 1-2 and comparative examples were tested, and the test results are shown in table one.
TABLE test results of examples and comparative examples
The results in the table one show that the initial setting time of the example 2 is less than that of the comparative example 2, and the compressive and flexural strength and the crack resistance of the examples 2h and 28d are both far greater than those of the comparative example 2 and stronger than those of the other examples and comparative examples, and the results in the examples 1 and the comparative example 1 show that the performance of the rapid repair material can be obviously improved by adding the composite efficient expanding agent.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. The preparation method of the super anti-crack rapid repair material is characterized by comprising the following steps:
s1: respectively weighing a certain amount of lead acid salt cement, ordinary portland cement, an early strength agent, a retarder, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash, acrylic emulsion, quartz sand and water, wherein the materials are used for later use;
s2: putting the weighed acid salt cement, ordinary portland cement, an early strength agent, a water reducing agent, rubber powder, a defoaming agent, micro silicon powder, fly ash and quartz sand into a stirrer, adding a composite efficient expanding agent, and stirring at a low speed for 5min to obtain uniform powder;
s3: mixing acrylic emulsion and water according to the proportion of 1:4 and stirring to obtain diluted emulsion;
s4: adding the diluted emulsion prepared in the step S3 into the uniform powder prepared in the step S2, and stirring slowly for 1min and then quickly for 1min to obtain a finished product of the quick repairing material;
wherein the composite high-efficiency expanding agent is prepared by stirring, mixing and grinding a certain amount of anhydrous calcium sulphoaluminate, calcium oxide, anhydrite and pentanediol.
2. The preparation method of the super anti-crack rapid repair material according to claim 1, wherein the composite high-efficiency expanding agent comprises the following components in percentage by mass:
anhydrous calcium sulphoaluminate, calcium oxide, anhydrite, pentanediol, 1:0.1:0.15: 0.05;
mixing and stirring the anhydrous calcium sulphoaluminate, the calcium oxide, the anhydrite and the pentanediol according to the mass ratio, and grinding the mixture into particles with the mesh number of more than or equal to 800 meshes to obtain the composite efficient expanding agent.
3. The preparation method of the super anti-crack rapid repair material according to claim 2, characterized in that: the S1 comprises the following material components:
30-35 parts of aluminate cement
8-12 parts of ordinary portland cement
0.02-0.2 part of early strength agent
0.3-0.5 part of retarder
3-6 parts of composite efficient expansion
0.2-0.5 part of water reducing agent
0.3-0.6 part of rubber powder
0.03 to 0.06 portion of defoaming agent
3-5 parts of silica fume
2-3 parts of fly ash
2-3 parts of acrylic emulsion
42-55 parts of quartz sand.
4. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: when the stirring is carried out at the low speed in S2 and S4, the revolution speed of the stirring blades is 62r/min, the maximum allowable error is +/-5 r/min, the rotation speed of the stirring blades is 140r/min, and the maximum allowable error is +/-5 r/min; during rapid stirring, the revolution speed of the stirring blades is 125r/min, the maximum allowable error is +/-10 r/min, the rotation speed of the stirring blades is 285r/min, and the maximum allowable error is +/-10 r/min.
5. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: the aluminate cement is 625 type aluminate cement, the ordinary portland cement is ordinary portland cement 525 cement or ordinary portland cement 425 cement, the early strength agent is lithium sulfate or lithium carbonate, and the retarder is superfine tartaric acid.
6. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the powder rubber powder is an ethylene-vinyl acetate copolymer.
7. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: the defoaming agent is one or more of polyether high-efficiency defoaming agent, organic silicon defoaming agent or mineral oil defoaming agent.
8. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: the micro silicon powder is superfine micro silicon powder with the mesh number of more than or equal to 1200 meshes.
9. The preparation method of the super anti-crack rapid repair material according to claim 1, characterized in that: the fly ash is first-grade original fly ash, the emulsion is acrylic emulsion, and the mesh number of the quartz sand is 70-140 meshes.
10. A super anti-crack rapid repair material is characterized in that: comprising the steps of any one of claims 1 to 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114349430A (en) * | 2022-01-19 | 2022-04-15 | 内蒙古工业大学 | Environment-friendly micro-expansion high-ductility cement-based composite material and preparation method thereof |
| CN114538854A (en) * | 2022-03-16 | 2022-05-27 | 交通运输部公路科学研究所 | Bottom quantization jacking material for assembled concrete pavement slab |
| CN115650658A (en) * | 2022-09-19 | 2023-01-31 | 福建省地恒建材有限责任公司 | Quick repairing material for concrete pavement |
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| CN102503210A (en) * | 2011-11-21 | 2012-06-20 | 天津豹鸣建筑工程材料有限责任公司 | High performance concrete expanding agent |
| CN110357544A (en) * | 2019-07-15 | 2019-10-22 | 天津炬实科技发展股份有限公司 | A kind of upper flow regime cracking resistance early-strength repairing mortar and preparation method thereof |
| CN112174562A (en) * | 2020-10-21 | 2021-01-05 | 安徽瑞和新材料有限公司 | Multifunctional admixture composition special for high-strength concrete and preparation method thereof |
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| CN102503210A (en) * | 2011-11-21 | 2012-06-20 | 天津豹鸣建筑工程材料有限责任公司 | High performance concrete expanding agent |
| CN110357544A (en) * | 2019-07-15 | 2019-10-22 | 天津炬实科技发展股份有限公司 | A kind of upper flow regime cracking resistance early-strength repairing mortar and preparation method thereof |
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| CN114349430A (en) * | 2022-01-19 | 2022-04-15 | 内蒙古工业大学 | Environment-friendly micro-expansion high-ductility cement-based composite material and preparation method thereof |
| CN114538854A (en) * | 2022-03-16 | 2022-05-27 | 交通运输部公路科学研究所 | Bottom quantization jacking material for assembled concrete pavement slab |
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