Concrete tackifying and water retaining agent and preparation method and application thereof

A water-retaining agent and concrete technology, which is applied in the field of concrete tackifying and water-retaining agent, can solve the problems of insufficient concrete slurry, increased water-cement ratio, poor concrete cohesion, etc., and achieves high engineering application value, improved compressive strength, good work effect

Active Publication Date: 2016-05-18
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, there is a shortage of natural sand and gravel resources, and there is no sand to be mined. The trend of machine-made sand and gravel to replace natural sand and gravel to prepare high-performance concrete is obvious; limestone machine-made sand concrete, C30 and below low-strength grade concrete all have poor concrete cohesion and concrete flow. The problem of quick loss of properties; clay mineral admixtures are easy to absorb water and cause volume expansion, and at the same time accelerate the loss

Method used

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  • Concrete tackifying and water retaining agent and preparation method and application thereof
  • Concrete tackifying and water retaining agent and preparation method and application thereof
  • Concrete tackifying and water retaining agent and preparation method and application thereof

Examples

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Embodiment 1

[0039] This embodiment provides a concrete viscosity-increasing and water-retaining agent, which is polymerized from the following raw materials: 50 g of methene butyl polyethylene glycol monopropylene glycol (corresponding to n=1 in general formula I) with a molecular weight of 2000, 75 g of acrylic acid, 2 - 20 g of methacrylamide-3-propenesulfonic acid, 5 g of vinyltris(2-methoxyethoxy)silane.

[0040]The concrete viscosity-increasing and water-retaining agent is prepared by the following specific steps: dissolve each raw material in 650 g of deionized water, and after the temperature is raised to 45° C., 83.5 g of persulfate solution with a concentration of 4.1% and 83.5 g of persulfate solution and Concentration is 1.8% L-ascorbic acid solution 81.5g, when dropping, control the temperature within 65°C, dropwise is completed within 3 hours, continue to keep warm at 65°C for 60 minutes to fully carry out the polymerization reaction; cool down after the reaction is completed,...

Embodiment 2

[0042] This embodiment provides a concrete viscosity-increasing and water-retaining agent, which is polymerized from the following raw materials: 50 g of methenebutyl polyethylene glycol (corresponding to n=0 in general formula I) with a molecular weight of 2000, 70 g of acrylamide, styrene Sodium sulfonate 25g, vinyl tris (2-methoxyethoxy) silane 5g.

[0043] The viscosity-increasing and water-retaining agent is prepared by the following specific steps: dissolve each raw material in 650g of deionized water, and after heating up to 45°C, simultaneously dropwise add 83.5g of persulfate solution with a concentration of 4.1% and a concentration of It is 81.5g of 1.8% L-ascorbic acid solution, the temperature is controlled within 65°C during the dropwise addition, and the dropwise addition is completed within 3 hours, and the temperature is kept at 65°C for 60 minutes to fully carry out the polymerization reaction; after the reaction is completed, cool and add 1000g of water, Add ...

Embodiment 3

[0045] This embodiment provides a concrete viscosity-increasing and water-retaining agent, which is polymerized from the following raw materials: 25g of methenebutyl polyethylene glycol (corresponding to n=0 in general formula I) with a molecular weight of 1000, 60g of acrylic acid, and 50g of acrylamide , sodium propylene sulfonate 15g, vinyltrimethoxysilane 0.5g.

[0046] The viscosity-increasing and water-retaining agent is prepared by the following specific steps: dissolve each raw material in 650g of deionized water, and after heating up to 45°C, simultaneously dropwise add 83.5g of persulfate solution with a concentration of 4.1% and a concentration of It is 81.5g of 1.8% L-ascorbic acid solution, the temperature is controlled within 65°C during the dropwise addition, and the dropwise addition is completed within 3 hours, and the temperature is kept at 65°C for 60 minutes to fully carry out the polymerization reaction; after the reaction is completed, cool and add 1000g o...

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Abstract

The invention relates to a concrete tackifying and water retaining agent. The concrete tackifying and water retaining agent is formed by polymerizing methyl ene butyl polyoxyethylene polyoxypropylene, unsaturated monocarboxylic acid or/and derivatives of unsaturated monocarboxylic acid, unsaturated alkenyl sulfonic acid or/and sodium salt of unsaturated alkenyl sulfonic acid and an unsaturated alkenyl organosilicone cross-linking agent. The invention further provides a preparation method of the concrete tackifying and water retaining agent. The concrete tackifying and water retaining agent can be applied to concrete with the grade of C30 or below, the tackifying and water retaining effect is excellent, the concrete fluidity loss is small, and high engineering application value is achieved.

Description

technical field [0001] The invention relates to the field of preparation of concrete admixtures, in particular to a concrete viscosity-increasing and water-retaining agent. Background technique [0002] Green high-performance concrete and reinforced concrete are the most important structural engineering materials for buildings in the 21st century. Due to the rapid development of domestic urbanization in recent years, a large amount of concrete raw materials have been consumed, and the corresponding supply of concrete raw materials has been changed. The uniform stability of concrete is the difficulty and focus of the preparation of green high-performance concrete today. In fact, there is a shortage of natural sand and gravel resources, and there is no sand to be mined. The trend of machine-made sand and gravel to replace natural sand and gravel to prepare high-performance concrete is obvious; limestone machine-made sand concrete, C30 and below low-strength grade concrete all ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/58C08F230/08C08F220/56C08F212/14C08F228/02C04B24/40
CPCC04B24/40C04B2103/44C04B2103/465C08F283/065C08F220/06C08F220/56
Inventor 李崇智袁荣辉杨水荣易仟刘俊李伟光王琴
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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