Concrete thickening agent and preparation method thereof

Abstract

The invention discloses a concrete thickening agent and a preparation method thereof. The concrete thickening agent is prepared from the following raw material components in parts by weight: 60-100 parts of nano silicon dioxide powder; 40-70 parts of a cohesive body; 0.3-1 part of a binder; 0.5-1 part of an oxidizing agent; 0.3-0.5 part of a stabilizing agent; 0.5-1 part of a chain transfer agent and 100-150 parts of water. The preparation method comprises the following steps: mixing nano silicon dioxide powder and a cohesive body in parts by mass to obtain a mixture; adding a binder, an oxidant, a stabilizer and a chain transfer agent into water in parts by weight, and mixing to obtain a mixed solution; adding the obtained mixed solution into the mixture, and performing full mixing to obtain a thickening agent. The thickener provided by the invention has small influence on the water reducing performance of concrete, can greatly improve the performance of concrete slurry, reduce concrete bleeding and improve the workability of concrete, and also has a positive effect on the strength of concrete.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular 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 include cellulose, xanthan gum, Wenlun g...

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Problems solved by technology

[0004] The purpose of the invention is to provide a concrete thickener and its preparation method, which solves the problems of poor water solubility and long dissolving time of existing thickeners; a large amount of mixing will cause a sharp decrease in concrete workability; poor compatibility with admixtures , easy to delaminate; excessive amount will cause adverse effects such as reduction of concrete strength, which limits its wide application

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