Preparation method of concrete containing modified cassava starch-polycarboxylic acid composite water reducing agent

Abstract

The invention discloses a preparation method of concrete containing a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The preparation method of the concrete comprises the following steps: adding the general portland cement, the fly ash, 75 parts of the water, the sodium carboxymethyl cellulose, the sand and the stones intoa stirrer and stirring for 15 minutes; adding the modified cassava starch-polycarboxylate superplasticizer, stirring for 5 minutes, and standing for 15 minutes; and adding ferrous sulfate into a ferrous sulfate stirrer, stirring for 4 minutes, and putting into a corresponding template to obtain the product. The concrete preparation method provided by the technical scheme has the advantages of easiness in operation, easiness in large-scale production and the like; the obtained concrete is smooth in appearance and good in durability, sand holes and air holes are not formed in the surface of theconcrete, and good mechanical properties such as high compressive strength are achieved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing concrete containing modified tapioca starch-polycarboxylic acid composite water reducing agent. Background technique [0002] Due to the defects in the formula and production process of traditional concrete, there are generally small pores and trachoma, which affect its appearance and also affect its use function. Depression occurs, if the amount of spray paint is increased, it will not only affect the appearance, but also the drying time of the paint will be different, which will affect the progress of the project. The board with air bubbles has poor water absorption performance, the surface of the board is easy to crack, poor durability, frost resistance, impermeability ability is greatly reduced. Therefore, reasonable selection of process flow, optimization of process parameters, correct operation, and control of operating system are of great significa...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a method for preparing concrete containing modified tapioca starch-polycarboxylic acid composite water reducing agent, to solve the complex preparation method in the above-mentioned prior art, high production cost or large energy consumption, and the resulting concrete Technical issues such as low strength requirements

It can also solve the technical problems that the existing water reducer products are toxic, non-biodegradable, and discharge a large amount of toxic waste liquid during the production process, making it difficult to meet the requirements of green and environmental protection.

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