Application of clay-resistant water reducing agent with high water reducing rate in concrete with high clay content

A concrete and high mud content technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of large loss of concrete slump, large loss of concrete slump over time, and reduction of polycarboxylic acid Dispersion and other issues

Active Publication Date: 2018-07-20
广西红墙新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the non-standard production process of machine-made sand, such as unwashed powder and mud, etc., there are problems of poor particle gradation and excessive mud and powder content. When the main component of mud powder is stone powder, the workability of concrete Favorable, but when the main component of mud powder is clay, it will absorb a large amount of water reducer. Clay is a layered substance with adjustable layer spacing, which can absorb a large amount of polycarboxylate water reducer. Studies have shown that clay The layered structure will cause the chain intercalation react

Method used

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  • Application of clay-resistant water reducing agent with high water reducing rate in concrete with high clay content
  • Application of clay-resistant water reducing agent with high water reducing rate in concrete with high clay content
  • Application of clay-resistant water reducing agent with high water reducing rate in concrete with high clay content

Examples

Experimental program
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Effect test

Embodiment 1

[0054] An embodiment of the preparation method of the high water-reducing and mud-resistant water-reducing agent of the present invention comprises the following steps:

[0055] (1) Water, 3-buten-1-amine, H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-neck glass flask with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 40°C, and slowly add formaldehyde solution with a mass concentration of 37%. The dropping time is controlled at 2 hours, and then the temperature is slowly raised to 75°C, and the reaction is continued for 2.5 hours to obtain the reaction monomer B;

[0056] (2) Water, APEG-CH 2 CH 2 NH 2 、H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-necked glass flask equipped with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 40°C, slowly add a 37% formaldehyde aqueous solution dropwise, and drop The addi...

Embodiment 2

[0065] An embodiment of the preparation method of the high water-reducing and mud-resistant water-reducing agent of the present invention comprises the following steps:

[0066] (1) Water, 3-buten-1-amine, H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-necked glass flask with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 45°C, and slowly add formaldehyde solution with a mass concentration of 37%. The dropping time is controlled at 1.5h, then the temperature is slowly raised to 85°C, and the reaction is continued for 1.5h to obtain the reaction monomer B;

[0067] (2) Water, HPEG-CH 2 CH 2 NH 2 、H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-necked glass flask equipped with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 45°C, and slowly add formaldehyde solution with a mass concentration of 37%. The addition ...

Embodiment 3

[0076] An embodiment of the preparation method of the high water-reducing and mud-resistant water-reducing agent of the present invention comprises the following steps:

[0077] (1) Water, 3-buten-1-amine, H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-necked glass flask with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 42°C, and slowly add formaldehyde solution with a mass concentration of 37%. The dropping time is controlled at 2 hours, and then the temperature is slowly raised to 80°C, and the reaction is continued for 2 hours to obtain the reaction monomer B;

[0078] (2) Water, TPEG-CH 2 CH 2 NH 2 、H 3 PO 3 Add concentrated hydrochloric acid with a mass concentration of 37% into a 500ml four-necked glass flask equipped with a stirrer, a thermometer, and a reflux condenser, fully stir and mix, heat up to 43°C, slowly add a 37% formaldehyde aqueous solution dropwise, drop The addition t...

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Abstract

The invention discloses an application of a clay-resistant water reducing agent with high water reducing rate in concrete with high clay content, further provides the concrete having high clay contentand containing the water reducing agent, and discloses the clay-resistant water reducing agent with high water reducing rate and a preparation method of the clay-resistant water reducing agent. The clay-resistant water reducing agent with the high water reducing rate is prepared from active monomers containing phosphorous acid functional groups and sulfonic acid functional groups by polymerization on the basis of the principle of high molecular structure design. The molecular structure is in the form of clusters and contains a large number of positively charged amine groups, so that the product is endowed with superior properties of high water reducing, high slump retaining and high tolerance to clay. The water reducing agent is used alone or compounded with other functional polycarboxylate superplasticizers for use, and has good water reducing and slump retaining properties for building solid waste recycled aggregate concrete.

Description

technical field [0001] The invention relates to the application of a water reducing agent in high mud content concrete, in particular to the application of a high water reducing and mud resistant type water reducing agent in high mud content concrete. Background technique [0002] With the unprecedented rapid development of my country's construction industry for more than 30 years, the natural resource consumption of concrete materials is huge, and the high-quality river sand is almost exhausted. Man-made machine-made sand has replaced artificial sand and has become an important raw material for concrete production. Due to the non-standard production process of machine-made sand, such as unwashed powder and mud, etc., there are problems of poor particle gradation and excessive mud and powder content. When the main component of mud powder is stone powder, the workability of concrete Favorable, but when the main component of mud powder is clay, it will absorb a large amount of...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F230/02C08F228/02C08F220/58C08G65/338C08G65/327C08G65/331C04B24/26C04B28/00C04B103/30
CPCC04B24/2694C04B28/00C04B2103/30C08F283/065C08G65/327C08G65/331C08G65/338C04B18/08C04B18/141C04B14/068C04B14/02C04B2103/302C08F220/585C04B24/165C04B24/246C04B28/02Y02W30/91
Inventor 张小富白淑英赵利华
Owner 广西红墙新材料有限公司
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