CN114292068A - Formula and preparation method of ALC (autoclaved lightweight concrete) board repair mortar - Google Patents
Formula and preparation method of ALC (autoclaved lightweight concrete) board repair mortar Download PDFInfo
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- CN114292068A CN114292068A CN202111660281.XA CN202111660281A CN114292068A CN 114292068 A CN114292068 A CN 114292068A CN 202111660281 A CN202111660281 A CN 202111660281A CN 114292068 A CN114292068 A CN 114292068A
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Abstract
The invention discloses a formula and a preparation method of ALC (autoclaved lightweight concrete) plate repair mortar, wherein the formula comprises water and powder in a weight ratio of 0.2:1, and the powder comprises the following components in percentage by weight: white cement 25%, heavy calcium carbonate powder 10%, yellow sand 64%, hydroxypropyl methyl cellulose ether 0.25%, wood fiber 0.15%, latex powder 0.55%, starch ether 0.05%, white cement marked PW42.5, wherein the heavy calcium carbonate powder is 325-mesh heavy calcium carbonate powder, the mesh size is 0.045mm, the yellow sand is screened by a 50-100-mesh screen, and the latex powder is DA-1200 type redispersible latex powder. The ALC board repair mortar has the advantages of good scraping property, good wettability, good construction performance, good sagging resistance, high bonding strength, good bonding performance with a base layer and an aerated concrete wallboard, good flexibility, less hollowing and dropping, good freeze thawing resistance and good ageing resistance.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a formula and a preparation method of ALC (autoclaved lightweight concrete) plate repair mortar.
Background
ALC is a short name of Autoclaved Lightweight Concrete (Autoclaved Lightweight Concrete), is one of high-performance Autoclaved aerated Concrete, can be used as a wall material and a roof panel, and is a novel building material with excellent performance. The board has good heat preservation performance and better heat insulation performance. Just because the aerated concrete wallboard has good heat insulation performance, the characteristics of the material, namely, the aerated concrete wallboard is porous and light in volume weight, so that the aerated concrete wallboard is damaged due to various reasons before the aerated concrete is delivered from a factory as a finished product, the use of the aerated concrete wallboard is influenced, particularly the aerated concrete wallboard, because the aerated concrete wallboard contains a steel keel, the manufacturing cost of each aerated concrete wallboard is relatively low, and the damage of the plate caused in the manufacturing, carrying and storing processes of the aerated concrete wallboard needs a material to make up the defect of the plate, so that the normal use of the plate is ensured.
The repair mortar for aerated concrete wallboards in the market has uneven quality, some repair mortars have poor constructability and poor water retention, and the repair mortar falls off due to high water absorption rate of the aerated concrete wallboards and low bonding strength between the repair mortar and the original wallboard by using the repair mortar with poor water retention. In addition, some repair mortars have poor sagging resistance, and can not be used for repairing larger defect parts at one time or needs a positioning tool to fix and shape the defect parts, otherwise, the defect parts can fall off in large blocks, so that the repair time of workers is prolonged, and the repair efficiency is reduced.
Therefore, the research and development of the bonding repair mortar which has good construction performance, good sagging resistance and good bonding strength and is well matched with the aerated concrete wallboard is difficult to overcome.
Disclosure of Invention
The invention aims to provide a formula and a preparation method of ALC plate repair mortar, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the formula of the ALC board repair mortar comprises water and powder in a weight ratio of 0.2:1, wherein the powder comprises the following components in percentage by weight:
20 to 30 percent of white cement, 5 to 15 percent of heavy calcium carbonate powder, 60 to 70 percent of yellow sand, 0.1 to 0.3 percent of hydroxypropyl methyl cellulose ether, 0.05 to 0.2 percent of wood fiber, 0.4 to 0.6 percent of latex powder and 0.03 to 0.07 percent of starch ether.
Further, the powder material comprises the following components in percentage by weight:
25% of white cement, 10% of heavy calcium powder, 64% of yellow sand, 0.25% of hydroxypropyl methyl cellulose ether, 0.15% of wood fiber, 0.55% of latex powder and 0.05% of starch ether.
Further, the white cement is indicated by PW 42.5.
Furthermore, the coarse whiting powder is 325 meshes, namely the coarse whiting powder screened by a 325-mesh screen mesh, and the mesh size of the screen is 0.045 mm.
Furthermore, the yellow sand is screened by a screen with 50-100 meshes.
Further, DA-1200 type redispersible latex powder is adopted as the latex powder.
A preparation method of ALC plate repair mortar comprises the following steps:
s1, weighing the weight of the required water and the weight of each component in the required powder according to the formula of the ALC board repair mortar disclosed in any one of claims 1 to 6;
s2, slowly adding the powder weighed in the S1 into a stirring barrel, and slowly stirring for 4-6 minutes to uniformly mix the powder to obtain a primary mixed material;
s3, taking out the primary mixed material obtained in S2, and then adding the water weighed in S1 into a stirring barrel;
and S4, slowly adding the primary mixed material taken out of the S3 into a stirring barrel, and stirring for 1-2 minutes to obtain the ALC panel repair mortar.
The invention has the technical effects and advantages that:
1. the ALC board repair mortar has good scraping performance, smooth scraping, no knife sticking, no rolling and good construction performance;
2. the ALC board repair mortar has good wettability, high water absorption rate of the aerated concrete wall panel, good construction on a thinner damaged part, no dry adhesion, no rolling and good construction performance;
3. the ALC board repair mortar has good sagging resistance, does not need a positioner, and can feed materials on a large damaged part at one time without slipping;
4. the ALC board repair mortar has high bonding strength and good bonding performance with a base layer and an aerated concrete wallboard;
5. the ALC board repair mortar has good flexibility and less hollowing and dropping;
6. the ALC board repair mortar has good freeze-thaw resistance and ageing resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The formula of the ALC board repair mortar comprises water and powder in a weight ratio of 0.2:1, wherein the powder comprises the following components in percentage by weight:
the white cement comprises 20% of white cement, 9% of heavy calcium carbonate powder, 70% of yellow sand, 0.25% of hydroxypropyl methyl cellulose ether, 0.13% of wood fiber, 0.55% of latex powder, 0.07% of starch ether, wherein the white cement is PW42.5 in label, the heavy calcium carbonate powder adopts 325-mesh heavy calcium carbonate powder, the mesh size is 0.045mm, the yellow sand is screened by a 50-100-mesh screen, and the latex powder adopts DA-1200 type redispersible latex powder.
The preparation method comprises the following steps:
s1, weighing the weight of the required water and the weight of each component in the required powder according to the formula of the ALC board repair mortar disclosed in any one of claims 1 to 6;
s2, slowly adding the powder weighed in the S1 into a stirring barrel, and slowly stirring for 4-6 minutes to uniformly mix the powder to obtain a primary mixed material;
s3, taking out the primary mixed material obtained in S2, and then adding the water weighed in S1 into a stirring barrel;
and S4, slowly adding the primary mixed material taken out of the S3 into a stirring barrel, and stirring for 1-2 minutes to obtain the ALC panel repair mortar.
The performance test of the ALC board repair mortar obtained in this example is shown in the following table.
Example 2
The formula of the ALC board repair mortar comprises water and powder in a weight ratio of 0.2:1, wherein the powder comprises the following components in percentage by weight:
white cement 25%, heavy calcium carbonate powder 10%, yellow sand 64%, hydroxypropyl methyl cellulose ether 0.20%, wood fiber 0.15%, latex powder 0.60%, starch ether 0.05%, white cement marked PW42.5, wherein the heavy calcium carbonate powder is 325-mesh heavy calcium carbonate powder, the mesh size is 0.045mm, the yellow sand is screened by a 50-100-mesh screen, and the latex powder is DA-1200 type redispersible latex powder.
The preparation method comprises the following steps:
s1, weighing the weight of the required water and the weight of each component in the required powder according to the formula of the ALC board repair mortar disclosed in any one of claims 1 to 6;
s2, slowly adding the powder weighed in the S1 into a stirring barrel, and slowly stirring for 4-6 minutes to uniformly mix the powder to obtain a primary mixed material;
s3, taking out the primary mixed material obtained in S2, and then adding the water weighed in S1 into a stirring barrel;
and S4, slowly adding the primary mixed material taken out of the S3 into a stirring barrel, and stirring for 1-2 minutes to obtain the ALC panel repair mortar.
The performance test of the ALC board repair mortar obtained in this example is shown in the following table.
Example 3
The formula of the ALC board repair mortar comprises water and powder in a weight ratio of 0.2:1, wherein the powder comprises the following components in percentage by weight:
the white cement comprises 30% of white cement, 12% of heavy calcium carbonate powder, 57% of yellow sand, 0.18% of hydroxypropyl methyl cellulose ether, 0.12% of wood fiber, 0.64% of latex powder, 0.06% of starch ether, the white cement is PW42.5 in label, the heavy calcium carbonate powder is 325-mesh heavy calcium carbonate powder, the mesh size is 0.045mm, the yellow sand is screened by a 50-100-mesh screen, and the latex powder is DA-1200 type redispersible latex powder.
The preparation method comprises the following steps:
s1, weighing the weight of the required water and the weight of each component in the required powder according to the formula of the ALC board repair mortar disclosed in any one of claims 1 to 6;
s2, slowly adding the powder weighed in the S1 into a stirring barrel, and slowly stirring for 4-6 minutes to uniformly mix the powder to obtain a primary mixed material;
s3, taking out the primary mixed material obtained in S2, and then adding the water weighed in S1 into a stirring barrel;
and S4, slowly adding the primary mixed material taken out of the S3 into a stirring barrel, and stirring for 1-2 minutes to obtain the ALC panel repair mortar.
The performance test of the ALC board repair mortar obtained in this example is shown in the following table.
As can be seen from the above 3 embodiments: the ALC board repairing mortar prepared according to the formula of the invention can reach standard requirements in the aspects of state, construction property, slippage, 14d tensile bonding strength, 28d compressive strength, shrinkage rate, freezing resistance and the like in a container, wherein the white cement content is in positive correlation with the 14d tensile bonding strength, and is in negative correlation with the strength loss rate in the 28d compressive strength, the shrinkage rate and the freezing resistance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The formula of the ALC board repair mortar is characterized by comprising water and powder in a weight ratio of 0.2:1, wherein the powder comprises the following components in percentage by weight:
20 to 30 percent of white cement, 5 to 15 percent of heavy calcium carbonate powder, 60 to 70 percent of yellow sand, 0.1 to 0.3 percent of hydroxypropyl methyl cellulose ether, 0.05 to 0.2 percent of wood fiber, 0.4 to 0.6 percent of latex powder and 0.03 to 0.07 percent of starch ether.
2. The formulation of the ALC board repair mortar of claim 1, characterized in that: the powder material comprises the following components in percentage by weight:
25% of white cement, 10% of heavy calcium powder, 64% of yellow sand, 0.25% of hydroxypropyl methyl cellulose ether, 0.15% of wood fiber, 0.55% of latex powder and 0.05% of starch ether.
3. The formulation of the ALC board repair mortar of claim 1, characterized in that: the white cement is marked with PW 42.5.
4. The formulation of the ALC board repair mortar of claim 1, characterized in that: the heavy calcium powder is 325 meshes of heavy calcium powder, namely the heavy calcium powder screened by a 325-mesh screen, and the size of a screen hole is 0.045 mm.
5. The formulation of the ALC board repair mortar of claim 1, characterized in that: and screening the yellow sand through a screen of 50-100 meshes.
6. The formulation of the ALC board repair mortar of claim 1, characterized in that: the latex powder adopts DA-1200 type redispersible latex powder.
7. The preparation method of the ALC board repair mortar is characterized by comprising the following steps:
s1, weighing the weight of the required water and the weight of each component in the required powder according to the formula of the ALC board repair mortar disclosed in any one of claims 1 to 6;
s2, slowly adding the powder weighed in the S1 into a stirring barrel, and slowly stirring for 4-6 minutes to uniformly mix the powder to obtain a primary mixed material;
s3, taking out the primary mixed material obtained in S2, and then adding the water weighed in S1 into a stirring barrel;
and S4, slowly adding the primary mixed material taken out of the S3 into a stirring barrel, and stirring for 1-2 minutes to obtain the ALC panel repair mortar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111660281.XA CN114292068A (en) | 2021-12-30 | 2021-12-30 | Formula and preparation method of ALC (autoclaved lightweight concrete) board repair mortar |
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| CN202111660281.XA CN114292068A (en) | 2021-12-30 | 2021-12-30 | Formula and preparation method of ALC (autoclaved lightweight concrete) board repair mortar |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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- 2021-12-30 CN CN202111660281.XA patent/CN114292068A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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