A kind of modified concrete water-retaining agent and preparation method thereof

Abstract

The invention relates to the technical field of concrete admixtures, in particular to a modified concrete water-retaining agent and a preparation method thereof. A modified concrete water-retaining agent, the preparation raw materials of the water-retaining agent, by weight, at least include the following components: 30-60 parts of anionic monomers containing double bonds, 10-30 parts of ester monomers containing double bonds 5-15 parts of alkali, 5-15 parts of molecular chain regulator, 1-5 parts of oxidizing agent, 1-5 parts of reducing agent, 300-600 parts of water. The invention provides a modified concrete water-retaining agent, which effectively solves the adaptability of polycarboxylate high-performance water-reducing agent to sand and gravel materials, especially the adaptability of sand and gravel materials with large mud content, and the production process is simple and suitable for Environmentally friendly and excellent in performance, it can be used effectively in combination with polycarboxylate high-performance water reducer.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a modified concrete water-retaining agent and a preparation method thereof. Background technique [0002] At present, concrete is needed in bridges, roads, subways and other projects. In order to meet the rapid development of other projects such as the construction industry, higher requirements are put forward for the performance of concrete. High-performance concrete and green concrete are the mainstream products of commercial concrete. Admixture is the third leap in concrete technology and an important technical way to improve concrete performance. In order to improve the workability of concrete and reduce environmental pollution in the process of producing admixtures, the research and development of polycarboxylate admixtures has been highly valued. It has ultra-dispersibility, can prevent the loss of concrete slump and does not cause obvious retardation , and has...

AI Technical Summary

Problems solved by technology

[0003] However, due to the high water-reducing properties of polycarboxylate high-performance water-reducing agent and its sensitivity to materials, it will either cause the concrete mixture to separate, segregate, bleed, and make the concrete mixture lose its workability; or the concrete mixture will lose its workability. The slump loss of the mixture is serious, and the long-distance and pipeline transportation of concrete cannot be guaranteed

[0004] At present, sand and gravel resources are tight, river sand supply is limited, many inferior sand and gravel are of poor quality and high in mud content, and they are put into use without washing with clean water, resulting in many quality problems during the construction process.

In order to solve the adaptability of polycarboxylate high-performance water reducer to sand and gravel, especially the adaptability of sand and gravel with large mud content, the present invention provides a concrete water-retaining product with simple production process, environmental friendliness and excellent performance. agent, can be used effectively with polycarboxylate high-performance water reducer

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