Polycarboxylate superplasticizer and preparation method thereof

Abstract

The invention discloses polycarboxylate superplasticizer and a peparation method thereoof. The polycarboxylate superplasticizer comprises following raw materials, by weight, 40 to 60 parts of alkylphenol ethoxylates, 25 to 35 parts of TPEG, 10 to 15 parts of cinnamic acid, 10 to 15 parts of Octenyl succinic anhydride, 5 to 10 parts of 2-Propenoic acid, 3-phenyl-, ethyl ester, 5 to 10 parts of methacrylic acid, 3 to 8 parts of isopropanol, 3 to 8 parts of sodium persulfate and 0.5 to 2 parts of ascorbic acid. The polycarboxylate superplasticizer has lower amount of mixture than other common polycarboxylate superplasticizer and has a high water-reducing rate under the circumstance of water-binder ratio. The polycarboxylate superplasticizer has the advantages of wider range of application, good anti-collapse of concrete, environmental protection. The polycarboxylate superplasticizer, prepared by this method, is capable of having wider adaption to concrete, making the system more stable, reducing usage of air entraining agent and making shrinkage ratio of concrete lower than common water reducer.

Description

technical field [0001] The invention relates to the field of concrete admixtures. More specifically, the present invention relates to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Water reducer is an admixture that can keep the workability of cement paste, mortar and concrete unchanged and significantly reduce the water consumption for mixing. It can significantly increase the strength of concrete, improve the frost resistance and impermeability of concrete or reduce the amount of cement. Several water reducers commonly used in the market are: lignosulfonate sodium salt water reducer, naphthalene-based high-efficiency water reducer, aliphatic high-efficiency water-reducer, amino high-efficiency water-reducer, polycarboxylate high-performance water-reducer Wait. Polycarboxylate high-performance water reducer is the third generation of high-performance water reducer developed after the common water reducer represented by wood...

AI Technical Summary

Problems solved by technology

[0003] The research and development of polycarboxylate superplasticizer should be comprehensively considered from the aspects of concrete performance, price, environmental protection, sustainable development, etc., and further develop towards high performance, multi-functional, ecological direction, polycarboxylate with low price and simple synthesis process The research on acid-based water reducers is of great significance to the progress of concrete materials and construction projects in my country. The dosage of polycarboxylate water reducers is low and the slump is maintained well. However, in practical applications, people are constantly looking for water reducers. The polycarboxylate superplasticizer with higher water rate, and the low dosage of polycarboxylate superplasticizer is very sensitive when the water-binder ratio is small, and shows a higher water-reducing rate, and when the water-binder ratio is larger, the water-binder ratio is higher. The water rate and its changes are not so obvious, so that the advantage of low dosage of polycarboxylate superplasticizer is not obvious in actual use. A polycarboxylate water-reducer with high water-reducing rate and a wider application range and a preparation method capable of producing such a high-performance polycarboxylate water-reducer

Images