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Concrete thickening agent and preparation method thereof

A technology of thickener and concrete, which is applied in the field of concrete thickener and its preparation, which can solve the problems of complex process, high cost of raw materials, high reaction temperature of preparation, etc., and achieve the effect of simple process, low industrial conditions and low reaction temperature

Active Publication Date: 2018-07-03
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the defects of high raw material cost, high preparation reaction temperature and complicated process of existing concrete thickeners, and provide a concrete thickener and its preparation method

Method used

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  • Concrete thickening agent and preparation method thereof
  • Concrete thickening agent and preparation method thereof
  • Concrete thickening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of concrete thickener, the steps are as follows:

[0041] (1), according to the component distribution ratio of Table 1, add 10wt.% water in the reactor, put into the aqueous solution thickening component, acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and initiator , fully stirred to complete the dissolution, and adjusted to control the reaction temperature at 10°C;

[0042] (2), under stirring state, dropwise add the solution that is prepared by reducing agent and 40wt.% water, dropwise time is 1h;

[0043] (3) After the dropwise addition, keep warm for 1 hour, then add the neutralizer and the remaining water, and stir evenly.

Embodiment 2

[0045] A preparation method of concrete thickener, the steps are as follows:

[0046] (1), according to the component distribution ratio of Table 1, add 30wt.% water in the reactor, put into the aqueous solution thickening component, acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and initiator , fully stirred to complete the dissolution, and adjusted to control the reaction temperature at 20°C;

[0047] (2), under stirring state, dropwise add the solution that is prepared by reducing agent and 20wt.% water, dropwise time is 1h;

[0048] (3) After the dropwise addition, keep warm for 1.5 hours, then add the neutralizer and the remaining water, and stir evenly.

Embodiment 3

[0050] A preparation method of concrete thickener, the steps are as follows:

[0051] (1), according to the component distribution ratio of Table 1, add 20wt.% water in the reactor, put into the aqueous solution thickening component, acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and initiator , fully stirred to complete the dissolution, and adjusted to control the reaction temperature at 10°C;

[0052] (2), under stirring state, dropwise add the solution that is prepared by reducing agent and 30wt.% water, dropwise time is 2h;

[0053] (3) After the dropwise addition, keep warm for 1 hour, then add the neutralizer and the remaining water, and stir evenly.

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Abstract

The invention discloses a concrete thickening agent and a preparation method thereof. The concrete thickening agent comprises the following components: 0.05-0.8% of an aqueous solution thickening component, 0.5-1.5% of acrylamide, 1-5% of acrylic acid, 0.3-1% of 2-acrylamide-2-methyl propanesulfonic acid, 0.05-0.5% of an initiator, 0.03-0.3% of a reducing agent, 0.6-3% of a neutralizing agent andbalance of water. The preparation method comprises the following steps: (1) mixing 10-30% of water with the aqueous solution thickening component, acrylamide, acrylic acid, 2-acrylamide-2-methyl propanesulfonic acid and the initiator, and controlling the temperature to be at 10-30 DEG C; (2) dropwise adding aqueous solution prepared from the reducing agent and 20-40% of water within 1-2 hours; and(3) carrying out heat preservation reaction, adding the neutralizing agent and residual water, and mixing, so that the concrete thickening agent is obtained. The concrete thickening agent disclosed by the invention has the advantages that raw materials are available, cost is low, technology is simple and practicable, preparation reaction temperature is low, and adaptability is good.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures in building materials, and in particular relates to a concrete thickener and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, infrastructure construction and various large and medium-sized projects have driven the rapid development of commercial concrete, and also brought huge material consumption, resulting in uneven quality of concrete mixtures and sand and gravel in various places. The application of inferior materials has brought a series of problems to the workability of concrete, such as the deterioration of concrete workability, segregation, bleeding and other phenomena, which seriously affect the quality and progress of the project. [0003] The occurrence of these phenomena is caused by the insufficient viscosity of the concrete slurry, which is generally solved by adding a thickener. Commonly used thickeners includ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F4/40C04B24/16C04B103/44
CPCC04B40/0039C04B2103/44C08F4/40C08F220/06C08F220/56C04B24/163C08F220/585
Inventor 杜辉王万林董建国翟立杰罗琼
Owner SHANGHAI DONGDA CHEM
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