A kind of concrete thickener and preparation method thereof

Abstract

The invention discloses a concrete thickener and a preparation method thereof. The concrete thickener is prepared by weight ratio of the following raw materials: nano-silica powder: 60-100 parts; cohesive body: 40 parts 0.3-1 part of binder; 0.5-1 part of oxidant; 0.3-0.5 part of stabilizer; 0.5-1 part of chain transfer agent, and 100-150 parts of water; the preparation method comprises the following steps: Mix the nano-silica powder and the cohesive body to obtain a mixture; according to the parts by weight, add the binder, oxidizing agent, stabilizer and chain transfer agent to the water, and mix to obtain a mixed solution; mix the obtained The thickener is added to the mixture and fully mixed to obtain a thickener; the thickener of the present invention has little effect on the water-reducing performance of concrete, can greatly improve the performance of concrete paste, reduce concrete bleeding, improve concrete workability, and have a good effect on concrete. Intensity also has positive effects.

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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