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Water-retaining thickening agent for composite dry mortars and preparation method thereof

A water-retaining thickener and dry powder mortar technology, which is applied in the field of dry-powder mortar water-retaining thickener, can solve the problems of producing composite water-retaining thickener and the like, and achieves good application prospects, simple process, and the effect of improving water-retention performance.

Inactive Publication Date: 2013-09-11
宁波荣山新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, low-cost small molecular organic sugars such as glucose have not been used as organic additives to produce complex water-retaining thickeners

Method used

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  • Water-retaining thickening agent for composite dry mortars and preparation method thereof
  • Water-retaining thickening agent for composite dry mortars and preparation method thereof
  • Water-retaining thickening agent for composite dry mortars and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 0.4g of glucose in water, stir well to dissolve, then add 80g of bentonite, stir and mix for 3h, then let stand at room temperature for 24h. After fully drying at 110°C, it is ground into powder, which is the new water-retaining thickener. Mix the prepared water-retaining thickener with 800g of 42.5 cement and 4000g of river sand, add 1000g of water, and test the water retention rate of the mortar after stirring. Then use the mold to make the freshly mixed mortar into a 40mm×40mm×160mm mortar test block; put it into a standard curing box, maintain it at 20°C and a relative humidity of 90%, and test the compressive strength for 28 days.

Embodiment 2

[0030] Dissolve 0.8g of glucose in water, stir well to dissolve, add 80g of bentonite, stir and mix for 3h, then let stand at room temperature for 12h. After fully drying at 150°C, it is ground into powder, which is the new water-retaining thickener. Mix the prepared water-retaining thickener with 800g of 42.5 cement and 4000g of river sand, add 1000g of water, and test the water retention rate of the mortar after stirring. Then use the mold to make the freshly mixed mortar into a 40mm×40mm×160mm mortar test block; put it into a standard curing box, maintain it at 20°C and a relative humidity of 90%, and test the compressive strength for 28 days.

Embodiment 3

[0032] Dissolve 1.2g of glucose in water, stir well to dissolve, then add 80g of bentonite, stir and mix for 3h, then let stand at room temperature for 72h. After fully drying at 130°C, grind it into powder, which is the new water-retaining thickener. Mix the prepared water-retaining thickener with 800g of 42.5 cement and 4000g of river sand, add 1000g of water, and test the water retention rate of the mortar after stirring. Then use the mold to make the freshly mixed mortar into a 40mm×40mm×160mm mortar test block; put it into a standard curing box, maintain it at 20°C and a relative humidity of 90%, and test the compressive strength for 28 days.

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Abstract

The invention relates to a water-retaining thickening agent for composite dry mortars and a preparation method thereof. The water-retaining thickening agent comprises the following components in percentage by weight: 95%-99.5% of high-adsorption silicate minerals and 0.5%-5% of micromolecular organic sugars. The preparation method comprises a wet process and a dry process. The water-retaining thickening agent has cost lower than that of a cellulose ethers water-retaining agent by 60 percent due to the low cost of the micromolecular organic sugars, enhances the water-retaining property of the dry mortars when used for the dry mortars, greatly reduces layering and bleeding phenomena and enhances the construction workability without influencing the strength development of the dry mortars; and in addition, the preparation method has a simple process, low cost and good application prospect.

Description

technical field [0001] The invention belongs to the field of water-retaining thickeners for dry powder mortar, in particular to a composite dry powder mortar water-retaining thickener and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, people have put forward various new requirements for the performance of mortar. Now the mortar is no longer only required to be qualified in strength. The requirements for functions such as impermeability are increasing, and the invention of mortar admixture has solved these problems well. [0003] Water retention thickener refers to non-lime powder materials used in dry powder mortar to improve the operability and water retention capacity of the mortar, reduce shrinkage and cracking, and strengthen the mortar. Domestic dry powder mortar water-retaining thickeners vary greatly in quality and quality. At present, the types of water-retaining thickeners for dry powder morta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/10
CPCC04B40/0608C04B40/0046
Inventor 李陆宝屠浩驰王小山阮华施卫平顾飞尔王智宇
Owner 宁波荣山新型材料有限公司
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