低引气减缩型聚羧酸系减水剂合成及性能研究

硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (1): 369-373.

低引气减缩型聚羧酸系减水剂合成及性能研究

张明

山东华伟银凯建材科技股份有限公司,淄博,256410

出版日期:2017-01-15 发布日期:2021-01-18
基金资助:
山东省高等学校科技计划项目(J15LA57)

Preparation and Properties of Low Air-entraining and Shrinkage-reducing Polycarboxylate Superplasticizer

ZHANG Ming

Online:2017-01-15 Published:2021-01-18

摘要/Abstract

摘要： 混凝土最大的缺陷是收缩开裂问题。以酯化大单体丁氧基聚乙二醇甲基丙烯酸酯( BPEGMA)、甲基丙烯酸(MAA)、减缩功能单体一缩二丙二醇单甲醚马来酸酯(DPGMAL)和消泡单体聚丙二醇丙烯酸酯(PPGA400)为原料合成了一种低引气减缩型聚羧酸系减水剂。考察了大单体种类、不同分子量 BPEGMA、MAA、 DPGMAL 和PPGA400用量对产品性能的影响规律，确定了合成产品最佳的工艺条件为 BPEGMA1000∶ MAA∶ DPGMAL∶PPGA400的摩尔比为1∶3.2∶0.6∶0.3。与市场上同类产品相比，合成产品具有较高的减水率、较好的减缩性能和较低的引气性。

关键词: 低引气;减缩;聚羧酸系减水剂

Abstract: The crack of concrete caused by shrinkage is a serious problem. A low air-entraining and shrinkage-reducing polycarboxylate superplasticizer was prepared by different type and molecular macro-monomer BPEGMA, MAA, shrinkage-reducing monomer DPGMAL and de-foaming monomer PPGA400. The influences of the amount of all the materials were discussed. The optimal molar ratio of BPEGMA1000, MAA, DPGMAL and PPGA400 was 1∶3. 2∶0. 6∶0. 3. Compared with the like product in the market, the copolymer had the better water-reducing, shrinkage-reducing and lower air-entraining property.

Key words: low air-entraining;shrinkage-reducing;polycarboxylate superplasticizer

中图分类号:

张明. 低引气减缩型聚羧酸系减水剂合成及性能研究[J]. 硅酸盐通报, 2017, 36(1): 369-373.

ZHANG Ming. Preparation and Properties of Low Air-entraining and Shrinkage-reducing Polycarboxylate Superplasticizer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2017, 36(1): 369-373.

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