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A high water-reducing and mud-resistant water-reducing agent and its preparation method

A water-reducing agent and mud-resistant technology, which is applied in the field of high water-reducing and mud-resistant water-reducing agents, can solve the problems of concrete loss of fluidity and slump, loss of concrete slump, loss of workability, etc., to avoid chains Intercalation reaction, effect of improving mud resistance

Active Publication Date: 2020-02-28
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

In view of the high mud content and complex composition of the recycled aggregate, the aggregate mud content is high, and a large amount of admixture is adsorbed on the surface of the soil particles, and the research shows that the PEO side chain of the polycarboxylate superplasticizer is connected with the soil particles. Intercalation reaction, the result of the joint action of the two is that the concrete slump loses quickly, so that the concrete completely loses its fluidity and slump, and loses workability. High water reducing agent with good performance

Method used

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  • A high water-reducing and mud-resistant water-reducing agent and its preparation method
  • A high water-reducing and mud-resistant water-reducing agent and its preparation method
  • A high water-reducing and mud-resistant water-reducing agent and its preparation method

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Embodiment 1

[0047] 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:

[0048] (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;

[0049] (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

[0058] 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:

[0059] (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 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 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;

[0060] (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, slowly add a 37% formaldehyde aqueous solution dropwise, and drop The additio...

Embodiment 3

[0069] 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:

[0070] (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 equipped 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;

[0071] (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...

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Abstract

The invention discloses a high water reduction mud-resistant water reducing agent and a preparation method thereof. The high water reduction mud-resistant water reducing agent is based on a polymer structure design principle, and is formed by polymerizing active monomers which contain a phosphite functional group and a sulphonate functional group; the molecular structure is in a cluster type and contains a large number of positively charged amino groups; therefore, product provided by the invention is endowed with high water-reducing property, high slump loss resistant property and superior tolerance to clay. When being singly used or combined with other functional polycarboxylic acid water reducers for use, the high water reduction mud-resistant water reducing agent has good water-reducing property and slump loss resistant property for building solid waste recycled aggregate concrete.

Description

technical field [0001] The invention relates to a high water-reducing and mud-resistant water-reducer, in particular to a high-water-reducing and mud-resistant water-reducer and a preparation method thereof. Background technique [0002] Concrete is the second most consuming material on earth after water. The annual consumption in the world exceeds 20 billion tons. While the consumption of concrete is huge, it also causes social and environmental problems of resource consumption and waste disposal. my country is the country with the largest number of newly built buildings in the world, and it is also the country with the largest number of old buildings demolished every year in the world. According to preliminary estimates, the demolition of buildings per square meter will generate about 1 ton of construction solid waste. The rapid development of cities will inevitably produce a large amount of construction solid waste, and proper disposal of construction solid waste has beco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F230/02C08F228/02C08F220/58C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F220/585C04B24/246
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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