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Preparation method for mortar with low dry shrinkage rate

A dry shrinkage and mortar technology, used in the field of building materials, can solve the problems of cracking and large dry shrinkage, and achieve the effects of reducing friction, reducing shrinkage and increasing the scope of application.

Inactive Publication Date: 2020-01-03
安徽惠明建材科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the existing mortar is solidified, the dry shrinkage rate is relatively large, which is easy to cause cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing mortar with low drying shrinkage, comprising the following steps:

[0022] (1) To prepare activated starch ether, treat the starch with an acid solution to obtain acidified starch, mix the acidified starch with an organic solvent 10 times its mass, add it to the reaction kettle, stir evenly, then add the catalyst, and heat it in a water bath to 82 -85°C, heat preservation and stirring for 2 hours, after standing still for 1 hour, remove the upper layer of organic solvent, wash the lower layer of precipitate with absolute ethanol solution, dry to constant weight, and obtain it;

[0023] (2) To prepare mortar, add quartz sand, cement, fly ash, water reducer, and glass fiber to the mixer in sequence, stir, then add water, continue stirring, and finally add activated starch ether, stir evenly, and the product is ready.

[0024] As a further technical solution, the starch is obtained by mixing soybean starch and tapioca starch in a mass ratio of 10:1-1...

Embodiment 2

[0036] A method for preparing mortar with low drying shrinkage, comprising the following steps:

[0037] (1) To prepare activated starch ether, treat the starch with an acid solution to obtain acidified starch, mix the acidified starch with an organic solvent 10 times its mass, add it to the reaction kettle, stir evenly, then add the catalyst, and heat it in a water bath to 82 ℃, heat preservation and stirring for 2 hours, after standing still for 1 hour, remove the organic solvent in the upper layer, wash the lower precipitate with anhydrous ethanol solution, and dry it to constant weight to obtain it;

[0038] (2) To prepare mortar, add quartz sand, cement, fly ash, water reducer, and glass fiber to the mixer in sequence, stir, then add water, continue stirring, and finally add activated starch ether, stir evenly, and the product is ready.

[0039] As a further technical solution, the starch is obtained by mixing soybean starch and tapioca starch in a mass ratio of 10:1, whe...

Embodiment 3

[0051] A method for preparing mortar with low drying shrinkage, comprising the following steps:

[0052] (1) To prepare activated starch ether, treat the starch with an acid solution to obtain acidified starch, mix the acidified starch with an organic solvent 10 times its mass, add it to the reaction kettle, stir evenly, then add the catalyst, and heat it in a water bath to 85 ℃, heat preservation and stirring for 2 hours, after standing still for 1 hour, remove the organic solvent in the upper layer, wash the lower precipitate with anhydrous ethanol solution, and dry it to constant weight to obtain it;

[0053] (2) To prepare mortar, add quartz sand, cement, fly ash, water reducer, and glass fiber to the mixer in sequence, stir, then add water, continue stirring, and finally add activated starch ether, stir evenly, and the product is ready.

[0054]As a further technical solution, the starch is formed by mixing soybean starch and tapioca starch in a mass ratio of 10: 1.3, whe...

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Abstract

The invention discloses a preparation method for mortar with a low dry shrinkage rate, and relates to the technical field of building materials. The method includes the following steps: (1) preparingactivated starch ether; and (2) preparing the mortar. According to the method, the activated starch ether is added into the mortar, so that the consistency of the mortar can be improved, and at the same time, the construction performance, sagging resistance and shrinkage resistance of the newly stirred mortar can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing mortar with a low drying shrinkage rate. Background technique [0002] In the process of urban construction in our country, a large amount of building materials need to be consumed. Therefore, the quality of building materials is directly related to the quality of urban construction. Mortar is one of the most widely used materials. Mortar is the bonding substance used in building bricks. It is composed of a certain proportion of sand and cementing materials (cement, lime paste, clay, etc.) and water. It is also called mortar and mortar. . After the existing mortar is solidified, the dry shrinkage rate is relatively large, which easily leads to cracking. Contents of the invention [0003] The object of the present invention is to provide a method for preparing mortar with low drying shrinkage in view of the existing problems. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/32C04B14/06C04B14/42C04B18/08C04B24/38C04B2103/302
Inventor 王俊鹏
Owner 安徽惠明建材科技发展有限公司
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