CN116120025A - Quick-hardening and quick-setting autoclaved aerated concrete block repair mortar - Google Patents

Quick-hardening and quick-setting autoclaved aerated concrete block repair mortar Download PDF

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Publication number
CN116120025A
CN116120025A CN202211658061.8A CN202211658061A CN116120025A CN 116120025 A CN116120025 A CN 116120025A CN 202211658061 A CN202211658061 A CN 202211658061A CN 116120025 A CN116120025 A CN 116120025A
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quick
hardening
agent
mortar
aerated concrete
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Pending
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CN202211658061.8A
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Inventor
张洲会
徐金平
林逸伦
高城
龚富玉
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Deqing Yangtai Building Material Co ltd
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Deqing Yangtai Building Material Co ltd
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Publication of CN116120025A publication Critical patent/CN116120025A/en
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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
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • 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
    • 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

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  • 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 invention discloses a quick-hardening and quick-setting autoclaved aerated concrete block repair mortar, and in particular relates to the technical field of building materials, wherein the repair mortar consists of gypsum mortar, a quick-hardening agent, an air entraining agent, a polymer additive and a setting agent, wherein the sum of the gypsum mortar, the quick-hardening agent, the air entraining agent, the polymer additive and the setting agent is 100 percent by weight: 63% -75% of gypsum mortar, 15% -20% of quick hardening agent, 0.05% -0.1% of air entraining agent, 4.5% -5.2% of polymer additive and 3.5% -4.8% of coagulant. The mortar prepared by the quick-hardening quick-setting autoclaved aerated concrete block repair mortar has higher adhesive strength, has similar dry density with the autoclaved aerated concrete block, has texture similar to the autoclaved aerated concrete block after hardening, has the quick-hardening quick-setting effect, reduces the retraction rate of the mortar after hardening, avoids the condition of cracking of the hardened repair part, ensures the qualification rate of products, and reduces the resource waste.

Description

Quick-hardening and quick-setting autoclaved aerated concrete block repair mortar
Technical Field
The invention relates to the technical field of building materials, in particular to a quick-hardening and quick-setting autoclaved aerated concrete block repair mortar.
Background
The autoclaved aerated concrete block brick is a porous concrete product which is prepared by taking lime, cement, gypsum and the like as main raw materials and adding a proper amount of gas generating agent, regulator and bubble stabilizer through the technological processes of proportioning stirring, pouring, standing, cutting, high-pressure steam curing and the like, has the characteristics of light weight, good heat preservation performance, good workability, high construction speed, strong bearing capacity, low comprehensive manufacturing cost and the like, has the incomparable performances of good fireproof, heat insulation, sound insulation, heat preservation and the like, and has been widely applied to walls, floors and roof boards in industrial and civil buildings, but because the inside of the autoclaved aerated concrete block is in a porous structure, the structure is loose, the hardness of the autoclaved aerated concrete block brick is easy to be reduced, the compressive strength of the autoclaved aerated concrete block brick is easy to break, the links of cutting, breaking, lifting, transporting, mounting and the like in the production process are easy to collide and squeeze the autoclaved aerated concrete block, the appearance quality, the product performance and the utilization rate are seriously affected, and the existing autoclaved aerated concrete block bricks have the defects in the construction process, the existing autoclaved aerated concrete block brick has the advantages of poor compatibility, the high-pressure-repairing strength and the like, and the existing autoclaved aerated concrete block has the defect that the existing autoclaved aerated concrete block brick has poor construction strength has poor compatibility and the high-pressure-repairing strength and the like.
The Chinese patent document CN103951340A discloses a repair mortar special for low-density autoclaved aerated concrete slabs, which takes white silicate cement and sand as base materials, and is matched with filler and functional admixture, wherein the weight percentages of the components are as follows: the repairing mortar prepared by the invention is easy to construct, polish and harden, has texture similar to autoclaved aerated concrete, strength and other indexes meet the existing standard requirements, but in the practical use process, the repairing mortar consists of white silicate cement, the cement mortar is easy to retract after hardening, is easy to crack after repairing, and has longer setting time and low repairing efficiency.
Disclosure of Invention
The invention mainly aims to provide a quick-hardening quick-setting autoclaved aerated concrete block repair mortar, which can effectively solve the problems that in the prior art, silicate cement is used for repairing, retraction easily occurs after hardening, cracking easily occurs after repairing, and the setting time is too long.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the repair mortar consists of gypsum mortar, a quick hardening agent, an air entraining agent, a polymer additive and a setting agent, wherein the sum of the gypsum mortar, the quick hardening agent, the air entraining agent, the polymer additive and the setting agent is 100 percent by weight: 63-70% of gypsum mortar, 15-20% of quick hardening agent, 0.05-0.1% of air entraining agent, 4.5-5.2% of polymer additive and 3.5-4.8% of coagulant.
Preferably, the gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand is 100 percent by weight: 65-73% of gypsum powder, 25-30% of fly ash and 5-10% of quartz sand.
Preferably, the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of quartz sand is 50-100 meshes.
Preferably, the air entraining agent adopts one or more of rosin resin, alkylbenzene sulfonate and fatty alcohol sulfonate.
Preferably, the polymer additive consists of redispersible latex powder and a water-retaining agent, wherein the sum of the weight percentages of the redispersible latex powder and the water-retaining agent is 100 percent: 93-97% of redispersible emulsion powder and 8-10% of water-retaining agent.
Preferably, the redispersible emulsion powder adopts one or two of vinyl acetate and acrylic acid type emulsion powder.
Preferably, the water retaining agent is hydroxypropyl methylcellulose ether having a viscosity of 40000 mpa.s.
Preferably, the setting modifier is quick hardening sulphoaluminate cement.
Preferably, the fine aggregate is fine sand with the particle size smaller than 4.75 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the quick hardening agent in the repairing mortar prepared by the invention has certain toughness, the strength of the mortar is effectively improved, the air entraining agent can improve the bonding strength of the mortar, the fluidity of the mortar is improved, the setting time of the mortar can be effectively regulated by the setting agent, the mortar has similar dry density with autoclaved aerated concrete blocks, the hardened mortar has similar texture with autoclaved aerated concrete blocks, the damaged part is repaired by using the repairing mortar prepared by the invention, the integrity of the autoclaved aerated concrete blocks can be ensured, the qualification rate of products is improved, and the resource waste is reduced.
2. The mortar prepared by the invention has the effects of rapid hardening and rapid solidification, has higher bonding strength and water retention, and fills the damaged position with the stirred mortar, so that the mortar can be well combined with the autoclaved aerated concrete block and is rapidly solidified due to the high-strength bonding degree.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Example 1
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
65% of gypsum mortar, 4.85% of polymer additive, 17% of quick hardening agent, 0.05% of air entraining agent, 4.1% of coagulant and 9% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 65% of gypsum powder, 27% of fly ash and 8% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: the redispersible emulsion powder is 91%, the water-retaining agent is 9%, the redispersible emulsion powder is acrylic acid type emulsion powder, and the water-retaining agent is hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected from early strength agents, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, and the setting modifier is quick hardening sulphoaluminate cement.
Example two
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
67% of gypsum mortar, 4.9% of polymer additive, 18% of quick hardening agent, 0.06% of air entraining agent, 4.14% of coagulant and 5.9% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 67% of gypsum powder, 28% of fly ash and 5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 92% of redispersible emulsion powder and 8% of water-retaining agent, wherein the redispersible emulsion powder adopts acrylic acid type emulsion powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulphoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example III
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
gypsum mortar, polymer additive, quick hardening agent, air entraining agent, coagulant and fine aggregate, the sum of which is 100 percent by weight: 69% of gypsum mortar, 5.03% of polymer additive, 18.5% of quick hardening agent, 0.07% of air entraining agent, 4.2% of coagulant and 3.2% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 68% of gypsum powder, 25.5% of fly ash and 6.5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 92.4% of redispersible emulsion powder and 7.6% of water-retaining agent, wherein the redispersible emulsion powder adopts acrylic acid type emulsion powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulphoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example IV
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
70% of gypsum mortar, 4.92% of polymer additive, 17.4% of quick hardening agent, 0.08% of air entraining agent, 4% of coagulant and 3.6% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 69% of gypsum powder, 24.6% of fly ash and 6.4% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 91.7% of redispersible emulsion powder and 8.3% of water-retaining agent, wherein the redispersible emulsion powder adopts acrylic acid type emulsion powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulfoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example five
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
68.8% of gypsum mortar, 4.98% of polymer additive, 18% of quick hardening agent, 0.05% of air entraining agent, 3.92% of coagulant and 4.25% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 70.5% of gypsum powder, 25% of fly ash and 4.5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 92.1% of redispersible emulsion powder and 7.9% of water-retaining agent, wherein the redispersible emulsion powder adopts acrylic acid type emulsion powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulfoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example six
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
70% of gypsum mortar, 4.6% of polymer additive, 16.8% of quick hardening agent, 0.08% of air entraining agent, 4% of coagulant and 4.52% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 72% of gypsum powder, 23% of fly ash and 5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 93.4% of redispersible latex powder and 6.6% of water-retaining agent, wherein the redispersible latex powder adopts acrylic acid type latex powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulfoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example seven
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
71.5% of gypsum mortar, 4.55% of polymer additive, 15.8% of quick hardening agent, 0.05% of air entraining agent, 3.8% of coagulant and 4.3% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 71.3% of gypsum powder, 24.2% of fly ash and 4.5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 93.4% of redispersible latex powder and 6.6% of water-retaining agent, wherein the redispersible latex powder adopts acrylic acid type latex powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulfoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
Example eight
The quick-hardening and quick-setting autoclaved aerated concrete block repair mortar disclosed in the embodiment is prepared from gypsum mortar, polymer additives, quick-hardening agents, air entraining agents, coagulant regulators and fine aggregates, and comprises the following components in percentage by weight:
71.6% of gypsum mortar, 4.64% of polymer additive, 16.5% of quick hardening agent, 0.07% of air entraining agent, 3.9% of coagulant and 3.29% of fine aggregate.
The gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand in percentage by weight is 100 percent: 70.4% of gypsum powder, 24.1% of fly ash and 5.5% of quartz sand, wherein the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of the quartz sand is 50-100 meshes.
Wherein the polymer additive consists of redispersible emulsion powder and a water-retaining agent, and the sum of the redispersible emulsion powder and the water-retaining agent is 100 percent by weight: 91.8% of redispersible emulsion powder and 8.2% of water-retaining agent, wherein the redispersible emulsion powder adopts acrylic acid type emulsion powder, and the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
Wherein, the quick hardening agent can also be selected as an early strength agent, a mineral high-activity aluminate mixed gel supplementary material is adopted, the air entraining agent adopts alkylbenzene sulfonate, the setting agent is quick hardening sulphoaluminate cement, and the fine aggregate is fine sand with the particle size of less than 4.75 mm.
The concrete preparation method of the rapid hardening and rapid setting autoclaved aerated concrete block repair mortar comprises the following steps: the weight of the raw materials is taken according to the proportion, the raw materials are added into a stirrer to be mixed and stirred uniformly, and in the using process, the mixed mortar dry material is added with water to be stirred for use and is smeared at the damaged part of the autoclaved aerated concrete block to be repaired.
Specific indexes of the rapid hardening rapid setting autoclaved aerated concrete block repair mortar comprise dry density, setting time, compressive strength, bonding strength and shrinkage, an experimental method refers to a JGJ/T70-2009 building mortar basic performance test method standard, and specific performances are shown in table one.
The first table shows the performance parameters of dry density, setting time, compressive strength, bonding strength and shrinkage of the rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar in each example.
Figure BDA0004012360280000091
According to the detection results of various properties of the repair mortar in the embodiment, the repair mortar for the rapid hardening and rapid hardening autoclaved aerated concrete block has high bonding strength and shrinkage, wherein the rapid hardening agent has certain toughness, the strength of the mortar is effectively improved, the air entraining agent can improve the bonding strength of the mortar, the fluidity of the mortar is improved, the setting time of the mortar can be effectively regulated by the setting agent, the hardened repair mortar has similar density and texture as those of the autoclaved aerated concrete block, and in the actual use process, the surface of the autoclaved aerated concrete block can be more complete when the damaged part is repaired, the qualification rate of the product is improved, and the resource waste is reduced.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A quick-hardening quick-setting autoclaved aerated concrete block repair mortar is characterized in that: the repair mortar consists of gypsum mortar, a polymer additive, a quick hardening agent, an air entraining agent, a coagulant and fine aggregates, wherein the sum of the gypsum mortar, the polymer additive, the quick hardening agent, the air entraining agent, the coagulant and the fine aggregates is 100 percent by weight: 63-75% of gypsum mortar, 4.5-5.2% of polymer additive, 15-20% of quick hardening agent, 0.05-0.1% of air entraining agent, 3.5-4.8% of coagulant and the balance of fine aggregate.
2. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 1, wherein: the gypsum mortar consists of gypsum powder, fly ash and quartz sand, wherein the sum of the gypsum powder, the fly ash and the quartz sand is 100 percent by weight: 60-73% of gypsum powder, 23-30% of fly ash and 5-13% of quartz sand.
3. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 2, wherein: the gypsum powder is building gypsum powder, the fly ash is light gray first-grade fly ash, and the fineness of quartz sand is 50-100 meshes.
4. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 1, wherein: the polymer additive consists of redispersible emulsion powder and a water-retaining agent, wherein the sum of the weight percentages of the redispersible emulsion powder and the water-retaining agent is 100 percent: 90-97% of redispersible emulsion powder and 6-10% of water-retaining agent.
5. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 4, wherein: the redispersible emulsion powder adopts one or two of vinyl acetate and acrylic acid type emulsion powder.
6. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 4, wherein: the water-retaining agent adopts hydroxypropyl methyl cellulose ether with the viscosity of 40000 mpa.s.
7. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 5, wherein: the air entraining agent adopts one or more of rosin resin, alkyl benzene sulfonate and fatty alcohol sulfonate.
8. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 1, wherein: the setting agent is quick hardening sulphoaluminate cement.
9. The rapid hardening and rapid hardening autoclaved aerated concrete block repair mortar as recited in claim 1, wherein: the fine aggregate is fine sand with the particle size smaller than 4.75 mm.
CN202211658061.8A 2022-12-22 2022-12-22 Quick-hardening and quick-setting autoclaved aerated concrete block repair mortar Pending CN116120025A (en)

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