CN114394802A - Repair mortar for ALC (autoclaved lightweight concrete) board and preparation method thereof - Google Patents
Repair mortar for ALC (autoclaved lightweight concrete) board and preparation method thereof Download PDFInfo
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- CN114394802A CN114394802A CN202210067919.7A CN202210067919A CN114394802A CN 114394802 A CN114394802 A CN 114394802A CN 202210067919 A CN202210067919 A CN 202210067919A CN 114394802 A CN114394802 A CN 114394802A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 94
- 230000008439 repair process Effects 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000004567 concrete Substances 0.000 title abstract description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000843 powder Substances 0.000 claims abstract description 66
- 229920002472 Starch Polymers 0.000 claims abstract description 36
- 239000004576 sand Substances 0.000 claims abstract description 36
- 239000008107 starch Substances 0.000 claims abstract description 36
- 235000019698 starch Nutrition 0.000 claims abstract description 36
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 27
- 239000004816 latex Substances 0.000 claims abstract description 25
- 229920000126 latex Polymers 0.000 claims abstract description 25
- 229920002678 cellulose Polymers 0.000 claims abstract description 24
- 239000001913 cellulose Substances 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 8
- 239000011575 calcium Substances 0.000 claims abstract description 8
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 20
- 239000000839 emulsion Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 229920002522 Wood fibre Polymers 0.000 claims description 9
- 239000002025 wood fiber Substances 0.000 claims description 9
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001038 ethylene copolymer Polymers 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000001341 hydroxy propyl starch Substances 0.000 claims description 5
- 235000013828 hydroxypropyl starch Nutrition 0.000 claims description 5
- 241000276489 Merlangius merlangus Species 0.000 claims description 4
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 4
- 229920001612 Hydroxyethyl starch Polymers 0.000 claims description 2
- 229940050526 hydroxyethylstarch Drugs 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 3
- 230000008014 freezing Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 29
- 239000000463 material Substances 0.000 description 7
- 238000007665 sagging Methods 0.000 description 6
- 206010016807 Fluid retention Diseases 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a repair mortar for ALC (autoclaved lightweight concrete) boards, which comprises the following raw materials in parts by weight: 80-120 parts of white cement, 120-180 parts of drying sand, 20-35 parts of heavy calcium carbonate powder, 0.2-0.8 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder; specifically, the feed comprises the following raw materials in parts by weight: 90-120 parts of white cement, 160 parts of dried sand 140, 26-32 parts of heavy calcium powder, 0.4-0.6 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder; the white cement is white portland cement with a strength grade of 42.5 or 52.5; the water content of the drying sand is less than or equal to 5%, and the particle size of the drying sand is 50-120 meshes. The repair mortar has excellent compressive strength, cohesiveness, crack resistance and freezing resistance, and provides a powerful guarantee for repairing the ALC board.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to repair mortar for ALC (autoclaved lightweight concrete) boards.
Background
ALC is short for autoclaved lightweight concrete, and is one of high-performance autoclaved aerated concrete (ALC). The ALC board is a porous concrete forming board (reinforced with processed reinforcing steel bars) which is formed by curing fly ash (or silica sand), cement, lime and the like serving as main raw materials through high-pressure steam. The ALC board can be used as a wall material and a roof board, and is a novel building material with excellent performance. ALC boards were first produced in europe, and have been produced and used in japan, europe, and other areas for over forty years. At present, the production technology and production equipment of domestic manufacturers are mainly introduced from Japan and Germany. The material has good heat preservation performance and better heat insulation performance, can be used in cold areas with high heat preservation requirements and can also be used in summer hot and winter cold areas or summer hot and winter warm areas with high heat insulation requirements when the material is in reasonable thickness, and meets the requirements of energy-saving standards.
ALC board is when using, it is inevitable that factors such as weather, humidity, wall body vibrations lead to the ALC board to produce the crack, can adopt the special repair mortar of ALC board to repair and mend the seam and handle the ALC board, current ALC board repair mortar is mostly by cement, quartz sand, the compound of polymer cementing material forms, it is relatively poor in bonding effect when restoreing the ALC board, bonding strength is low, influence and the integrative nature of ALC board structure after the coating, the wholeness is relatively poor, and it drops to appear falling the skin during the use easily, the fracture scheduling problem, the result of use of ALC board has been influenced.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides the repair mortar for the ALC board, which has high strength, excellent adhesive force, crack resistance and frost resistance, and provides a powerful guarantee for repairing the ALC board. In addition, the invention also provides a preparation method of the repairing mortar for the ALC plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a repair mortar for an ALC plate, which comprises the following raw materials in parts by weight:
80-120 parts of white cement, 120-180 parts of drying sand, 20-35 parts of heavy calcium carbonate powder, 0.2-0.8 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder.
Specifically, the feed comprises the following raw materials in parts by weight:
90-120 parts of white cement, 160 parts of dried sand 140, 26-32 parts of heavy calcium powder, 0.4-0.6 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder.
By adopting the technical scheme, the better mortar raw material proportion is used, the compressive strength, the crack resistance and the bonding property of the mortar are improved, the product constructability is improved, and the material waste is reduced.
Specifically, the white cement is white portland cement having a strength grade of 42.5 or 52.5.
Specifically, the water content of the dried sand is less than or equal to 5%, and the particle size of the dried sand is 50-120 meshes.
The addition of the drying sand is beneficial to improving the air permeability of the mortar, reducing hollowing and improving the anti-cracking performance of the mortar.
Specifically, the particle size of the heavy calcium powder is 200-600 meshes.
The added coarse whiting powder effectively improves the toughness and the strength of the mortar and reduces the cost of the mortar.
Specifically, the cellulose is wood fiber, and the length of the wood fiber is 1-3 mm.
The addition of wood fiber is helpful for improving the viscosity, plasticity and water retention of the mortar, so that the mortar has small dry shrinkage deformation and good crack resistance.
Specifically, the starch ether is carboxymethyl starch ether, hydroxypropyl starch ether or hydroxyethyl starch ether.
Preferably, the starch ether is hydroxypropyl starch ether.
The specific function of the starch ether in the mortar is as follows: the mortar is thickened, the sagging resistance and the rheological property of the mortar are improved, in the mortar construction, particularly the high fluidity is required by the existing mechanical spraying, but the high fluidity can bring about the serious sagging phenomenon, and the starch ether can make up for the defect; the fluidity and the sag resistance are often contradictory, the sag resistance is reduced due to the improvement of the fluidity, and the mortar has rheological property after the starch ether is added, so that the contradiction can be well solved, namely, when external force is applied, the viscosity is reduced, the constructability and the pumpability are enhanced, and when the external force is removed, the viscosity is increased, and the sag resistance is improved.
Specifically, the latex powder is redispersible latex powder based on vinyl acetate and ethylene copolymer.
The addition of the latex powder improves the compressive strength and the flexural strength of the mortar, and also can improve the elongation of the mortar, thereby improving the impact toughness of the mortar, simultaneously endowing the mortar with good stress dispersion effect, reducing the elastic modulus of the mortar, improving the deformability and reducing the cracking phenomenon; in addition, the bonding performance of the mortar is improved, and the bonding principle is as follows: the latex powder macromolecule is adsorbed and diffused on the adhesion surface, and meanwhile, the latex powder has certain permeability and can infiltrate the base material, so that the surface performance of the base layer and the new coating layer is close, the adsorbability is improved, and the performance of the base layer is greatly improved.
The second aspect of the present invention provides a preparation method of the repair mortar for ALC plates, including the following steps:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding white cement and drying sand into a container, and stirring and mixing uniformly to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing to obtain the repair mortar.
Specifically, in the step S2 and the step S3, the rotation speed during stirring is 800-1800 r/min.
Compared with the prior art, the invention has the following beneficial effects:
the repair mortar is prepared by compounding white cement, dried sand, coarse whiting powder, cellulose, starch ether and latex powder, and the dried sand with a proper particle size is adopted, so that the air permeability of the mortar is improved, the hollowing is reduced, and the crack resistance of the mortar is improved; the heavy calcium carbonate powder is added into the mortar, so that the toughness and strength of the mortar are effectively improved, and the cost of the mortar is reduced; the addition of the cellulose in the mortar is beneficial to improving the viscosity, plasticity and water retention of the mortar, so that the mortar has small dry shrinkage deformation and good crack resistance; starch ether is added to thicken the mortar, so that the sagging resistance, the sagging resistance and the rheological property of the mortar are improved, and the construction is more convenient; the addition of the latex powder improves the compressive strength and the flexural strength of the mortar, and also can improve the elongation of the mortar, thereby improving the impact toughness of the mortar, simultaneously endowing the mortar with good stress dispersion, reducing the elastic modulus of the mortar, improving the deformability and reducing the cracking phenomenon;
the components are compounded in a specific matching manner, so that the obtained repair mortar has excellent compressive strength, cohesiveness, crack resistance and freezing resistance, and provides a powerful guarantee for repairing the ALC board.
Detailed Description
Example 1
The repair mortar for the ALC board comprises the following raw materials:
1000Kg of white Portland cement (strength grade of 42.5), 1400Kg of dried sand (water content is less than or equal to 5%, particle size of 50-120 meshes), 260Kg of heavy calcium powder (particle size of 200-600 meshes), 4Kg of wood fiber (length of 1-3mm), 3Kg of starch ether (hydroxypropyl starch ether) and 5Kg of latex powder (redispersible latex powder based on vinyl acetate and ethylene copolymer).
The concrete preparation process of the repair mortar for the ALC board is as follows:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding the white cement and the drying sand into a container, and uniformly stirring and mixing the white cement and the drying sand, wherein the stirring speed is 1200r/min, and the stirring time is 3 hours, so as to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing for 2 hours to obtain the repair mortar.
Example 2
The repair mortar for the ALC board comprises the following raw materials:
800Kg of white Portland cement (strength grade is 42.5), 1800Kg of dried sand (the water content is less than or equal to 5 percent and the particle size is 50-120 meshes), 200Kg of heavy calcium powder (the particle size is 200-600 meshes), 2Kg of wood fiber (the length is 1-3mm), 1Kg of starch ether (carboxymethyl starch ether) and 2Kg of latex powder (redispersible latex powder based on vinyl acetate and ethylene copolymer).
The concrete preparation process of the repair mortar for the ALC board is as follows:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding white cement and drying sand into a container, and uniformly stirring and mixing at a stirring speed of 1800r/min for 2h to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing for 1h to obtain the repair mortar.
Example 3
The repair mortar for the ALC board comprises the following raw materials:
900Kg of white Portland cement (strength grade is 42.5), 1600Kg of baked sand (moisture content is less than or equal to 5 percent and particle size is 50-120 meshes), 320Kg of heavy calcium powder (particle size is 200-600 meshes), 6Kg of wood fiber (length is 1-3mm), 5Kg of starch ether (hydroxypropyl starch ether) and 1Kg of latex powder (redispersible latex powder based on vinyl acetate and ethylene copolymer).
The concrete preparation process of the repair mortar for the ALC board is as follows:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding white cement and drying sand into a container, and stirring and mixing uniformly at a stirring speed of 800r/min for 6 hours to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing for 3 hours to obtain the repair mortar.
Example 4
The repair mortar for the ALC board comprises the following raw materials:
1200Kg of white Portland cement (strength grade is 42.5), 1200Kg of dried sand (the water content is less than or equal to 5 percent and the particle size is 50-120 meshes), 350Kg of heavy calcium powder (the particle size is 200-600 meshes), 8Kg of wood fiber (the length is 1-3mm), 5Kg of starch ether (carboxymethyl starch ether) and 3Kg of latex powder (redispersible latex powder based on vinyl acetate and ethylene copolymer).
The concrete preparation process of the repair mortar for the ALC board is as follows:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding the white cement and the drying sand into a container, and uniformly stirring and mixing the white cement and the drying sand, wherein the stirring speed is 1200r/min, and the stirring time is 3 hours, so as to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing for 2 hours to obtain the repair mortar.
Examples of the experiments
The repair mortar prepared in examples 1 to 4 was subjected to performance tests of appearance, compressive strength, water retention, tensile bond strength, shrinkage and frost resistance according to the mortar for autoclaved aerated concrete walls JC/T890-2017 and the method for testing basic performance of building mortar JGJ/T70-2009.
The whole detection environment condition is 22 ℃ and 55% RH.
Main equipment for detection: SP175 vertical mortar contraction instrument (ZTC-027), UJZ-15 mortar stirrer (ZTC-1109), DN300 electro-hydraulic servo pressure tester (ZTC-191), BWS130-SNR electronic scale (ZTC-221), STZK-82 vacuum drying box (ZTC-308), YP2001 electronic balance (ZTC-366), 150mm steel ruler (ZTC-385), TDS-300 concrete freeze-thaw tester (ZTC-578), ZQS6-2000A high-precision bond strength drawing instrument (ZTC-746).
The results of the specific tests are shown in Table 1.
TABLE 1
The test results in Table 1 show that the repair mortar materials in examples 1-4 are uniform and have no caking phenomenon, the 28d compressive strength is between 6.0MPa and 6.3MPa, the water retention rate is between 99.3 percent and 99.6 percent, the tensile bond strength is between 0.32MPa and 0.36MPa, the shrinkage rate is between 0.15 percent and 0.17 percent, and the strength loss rate in the frost resistance test is between 10 percent and 12 percent; the mass loss rate is between 0 percent and 1 percent, and all performance indexes meet the requirements.
In conclusion, the repair mortar is prepared by compounding white cement, drying sand, coarse whiting powder, cellulose, starch ether and latex powder, and the drying sand with the proper particle size is adopted, so that the air permeability of the mortar is improved, the hollowing is reduced, and the crack resistance of the mortar is improved; the heavy calcium carbonate powder is added into the mortar, so that the toughness and strength of the mortar are effectively improved, and the cost of the mortar is reduced; the addition of the cellulose in the mortar is beneficial to improving the viscosity, plasticity and water retention of the mortar, so that the mortar has small dry shrinkage deformation and good crack resistance; starch ether is added to thicken the mortar, so that the sagging resistance, the sagging resistance and the rheological property of the mortar are improved, and the construction is more convenient; the addition of the latex powder improves the compressive strength and the flexural strength of the mortar, and also can improve the elongation of the mortar, thereby improving the impact toughness of the mortar, simultaneously endowing the mortar with good stress dispersion, reducing the elastic modulus of the mortar, improving the deformability and reducing the cracking phenomenon; the components are compounded in a specific matching manner, so that the obtained repair mortar has excellent compressive strength, cohesiveness, crack resistance and freezing resistance, and provides a powerful guarantee for repairing the ALC board.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. The repairing mortar for the ALC board is characterized by comprising the following raw materials in parts by weight:
80-120 parts of white cement, 120-180 parts of drying sand, 20-35 parts of heavy calcium carbonate powder, 0.2-0.8 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder.
2. The repair mortar for the ALC board as claimed in claim 1, characterized by comprising the following raw materials by weight:
90-120 parts of white cement, 160 parts of dried sand 140, 26-32 parts of heavy calcium powder, 0.4-0.6 part of cellulose, 0.1-0.5 part of starch ether and 0.1-0.5 part of latex powder.
3. The repair mortar for an ALC panel as claimed in claim 1, wherein the white cement is white portland cement having a strength grade of 42.5 or 52.5.
4. The repair mortar for the ALC board as claimed in claim 1, characterized in that the moisture content of said dried sand is less than or equal to 5%, and the particle size of said dried sand is 50-120 mesh.
5. The repair mortar for the ALC board as recited in claim 1, characterized in that the coarse whiting powder has a particle size of 200-600 mesh.
6. The repair mortar for an ALC board according to claim 1, characterized in that said cellulose is wood fiber, the length of said wood fiber is 1-3 mm.
7. The repair mortar for the ALC board of claim 1, wherein the starch ether is carboxymethyl starch ether, hydroxypropyl starch ether or hydroxyethyl starch ether.
8. The repair mortar for the ALC boards according to claim 1, characterized in that said latex powder is redispersible latex powder based on vinyl acetate and ethylene copolymer.
9. The preparation method of the repair mortar for the ALC board as claimed in claim 1, characterized by comprising the following steps:
s1, weighing white cement, drying sand, heavy calcium carbonate powder, cellulose, starch ether and emulsion powder according to the formula ratio;
s2, adding white cement and drying sand into a container, and stirring and mixing uniformly to obtain mixed powder;
s3, adding the heavy calcium carbonate powder, the cellulose, the starch ether and the emulsion powder into the container, and continuously stirring and mixing to obtain the repair mortar.
10. The method for preparing the repair mortar for the ALC boards as recited in claim 9, wherein the rotation speed during stirring is 800-1800r/min in the steps S2 and S3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210067919.7A CN114394802A (en) | 2022-01-20 | 2022-01-20 | Repair mortar for ALC (autoclaved lightweight concrete) board and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073965A (en) * | 2022-06-29 | 2022-09-20 | 厦门百正防腐工程有限公司 | Anti-cracking repair material applied to surface of bridge tunnel and preparation method thereof |
| CN116283130A (en) * | 2023-02-13 | 2023-06-23 | 华润水泥技术研发有限公司 | Low-cost white ALC special adhesive mortar and preparation method thereof |
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|---|---|---|---|---|
| CN103951340A (en) * | 2014-04-11 | 2014-07-30 | 天津天筑建材有限公司 | Repair mortar specially used for low-density autoclaved aerated concrete slabs |
| CN108046707A (en) * | 2017-12-26 | 2018-05-18 | 陕西凝远新材料科技股份有限公司 | A kind of sand aerated concrete plate adhesive special and preparation method thereof |
| CN111848042A (en) * | 2020-07-23 | 2020-10-30 | 深圳市亿东阳建材有限公司 | Wallboard bonding mortar and preparation method thereof |
| CN112777985A (en) * | 2021-01-11 | 2021-05-11 | 深圳市星耀福实业有限公司 | Special bonding mortar for ALC (autoclaved lightweight concrete) board and preparation method thereof |
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| CN115073965A (en) * | 2022-06-29 | 2022-09-20 | 厦门百正防腐工程有限公司 | Anti-cracking repair material applied to surface of bridge tunnel and preparation method thereof |
| CN116283130A (en) * | 2023-02-13 | 2023-06-23 | 华润水泥技术研发有限公司 | Low-cost white ALC special adhesive mortar and preparation method thereof |
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