Special additive for machine-made sand plastering mortar and preparation method thereof

A plastering mortar and admixture technology, which is applied in the field of special admixtures for machine-made sand plastering mortar and its preparation, can solve problems such as poor batch scraping, bleeding, and affecting the construction performance of machine-made sand mortar, so as to increase stability, The effect of improving construction performance

Inactive Publication Date: 2021-12-17
四川成德预拌砂浆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventors found that the existing mortar admixtures on the market are mainly developed for the mortar with natural sand as the mortar aggregate, and directly applying it to the machine-made sand mortar will seriously affect the construction performance of the machine-made sand mortar, such as Severe bleeding, poor batch scraping and easy cracking and hollowing of the mortar

Method used

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  • Special additive for machine-made sand plastering mortar and preparation method thereof
  • Special additive for machine-made sand plastering mortar and preparation method thereof
  • Special additive for machine-made sand plastering mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of special admixture for machine-made sand plastering mortar comprises the following steps:

[0042] Mix 0.7kg of polycarboxylate water reducer and 1kg of water uniformly in the first reaction kettle, then add 2kg of cellulose ether and 0.5kg of starch ether into the first reaction kettle under stirring, and stir evenly to obtain mixture I;

[0043] Add 4kg of water into the second reaction kettle, start stirring, and add 0.8kg of maltodextrin, 0.2kg of air-entraining agent AOS, 0.3kg of magnesium aluminum silicate and 0.5kg of tartaric acid into the second reaction kettle under stirring, and stir evenly. Mixture II is obtained;

[0044] Pour the mixture I in the first reaction kettle into the second reaction kettle and mix it with the mixture II, stir for 3 hours, and stir evenly to prepare the special admixture for machine-made sand plastering mortar.

Embodiment 2

[0046] A preparation method of special admixture for machine-made sand plastering mortar comprises the following steps:

[0047]Mix 1.2kg of polycarboxylate water reducer and 1.0kg of water in the first reaction kettle evenly, then add 1.2kg of cellulose ether and 0.3kg of starch ether into the first reaction kettle under stirring, and stir evenly to obtain the mixture I ;

[0048] Add 4kg of water into the second reaction kettle, start stirring, and add 0.8kg of maltodextrin, 0.2kg of air-entraining agent AOS, 0.3kg of magnesium aluminum silicate and 1.0kg of tartaric acid into the second reaction kettle under stirring, and stir evenly. Mixture II is obtained;

[0049] Pour the mixture I in the first reaction kettle into the second reaction kettle and mix it with the mixture II, stir for 3 hours, and stir evenly to prepare the special admixture for machine-made sand plastering mortar.

Embodiment 3

[0051] A preparation method of special admixture for machine-made sand plastering mortar comprises the following steps:

[0052] Mix 1.0kg of polycarboxylate superplasticizer and 1.0kg of water in the first reaction kettle evenly, then add 1.7kg of cellulose ether and 0.3kg of starch ether into the first reaction kettle under stirring, and stir evenly to obtain the mixture I ;

[0053] Add 4.0kg of water into the second reaction kettle, start stirring, add 0.8kg of maltodextrin, 0.2kg of air-entraining agent AOS, 0.3kg of magnesium aluminum silicate and 0.7kg of tartaric acid into the second reaction kettle under stirring, and stir evenly , to obtain mixture II;

[0054] Pour the mixture I in the first reaction kettle into the second reaction kettle and mix it with the mixture II, stir for 3 hours, and stir evenly to prepare the special admixture for machine-made sand plastering mortar.

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Abstract

The invention relates to the field of buildings, and particularly discloses a special additive for machine-made sand plastering mortar and a preparation method of the special additive. The admixture is prepared from the following raw materials in parts by weight: 12-20 parts of cellulose ether, 1-5 parts of starch ether, 7-12 parts of a water reducing agent, 5-11 parts of a thickening agent, 2-10 parts of an air entraining agent, 1-4 parts of magnesium aluminum silicate, 5-10 parts of a retarder and 40-60 parts of water; the preparation method comprises the following steps: dividing water into two parts, uniformly mixing the water reducing agent with one part of water, then adding the cellulose ether and the starch ether while stirring, and carrying out uniform stirring to obtain a mixture I; adding a thickening agent, an air entraining agent, magnesium aluminum silicate and a retarder into the other part of water under stirring, and carrying out uniform stirring to obtain a mixture II; and stirring the mixture I and the mixture II for 2-3 hours to obtain the admixture. When the admixture is used in the machine-made sand plastering mortar, the construction performance of the machine-made sand plastering mortar can be remarkably improved.

Description

technical field [0001] The application relates to the field of construction, more specifically, it relates to a special admixture for machine-made sand plastering mortar and a preparation method thereof. Background technique [0002] my country is a country with a large infrastructure, and the construction of various infrastructure such as roads, railways, and airports has a very high demand for sand and gravel. However, due to the joint influence of restrictions on natural sand mining, crackdown on illegal sand mining, and environmental protection supervision, the price of sand and gravel in most areas of my country has risen again and again, and the supply is still in short supply. Under this environment, machine-made sand has emerged as the times require. Machine-made sand refers to sand processed by sand making machines and other auxiliary equipment. It can be processed into sand of different rules and sizes according to different process requirements, so as to meet dai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/383C04B24/38C04B2103/302C04B2103/44C04B2103/304C04B22/08C04B2103/22
Inventor 曾帅
Owner 四川成德预拌砂浆有限公司
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