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一種降黏型聚羧酸減水劑的合成與性能研究

作者:李興,楊文,熊龍,蔡正華,邢菊香,周永康

關鍵字:一種,降黏型,聚,羧酸,減,水劑,的,合成,與,

 
(中建商品混凝土有限公司技術中心,湖北 武漢  430205)
摘要:通過在主鍊引入一種不飽和烷基磷酸三酯單體,使所得聚羧酸減水劑分子呈雜環狀多支化結構,增大聚羧酸減水劑吸附層厚度,可以顯著降低混凝土的塑性黏度,同時不影響聚羧酸減水劑的減水性能。經高強度等級混凝土應用結果表明,該産品可提高高強度等級混凝土的泵送性能,混凝土的各項性能指标良好。
關鍵詞:降黏;高标号混凝土;磷酸三酯;吸附層
中圖分類号:TU528.042+.2        文獻标識碼:A        文章編号:1001-702X(2019)07-0135-04
 
Research on synthesis and performance of a viscosity-reducing type ploycarboxylate superplasticizer
LI Xing,YANG Wen,XIONG Long,CAI Zhenghua,XING Juxiang,ZHOU Yongkang
(China Construction Ready Mixed Concret Co. Ltd.,Wuhan 430205,China)
Abstract:In this study,a kind of alkyl phosphate triester monomer is introduced in the ploycarboxylate superplasticizer chain,this ploycarboxylate superplasticizer molecules show a heterocyclic multibranched structure. The structure can increase the thickness of adsorption layer while significantly reduce the plastic viscosity of concrete,meanwhile not affecting the water reducing performance of polycarboxylic superplasticizer. The application of this product in high grade concrete also indicates that the performance indexes of concrete are all good,which improves the pumping capacity of high grade concrete.
Key words:viscosity-reducing,hige grade concrete,phosphate triesters,adsorbed layer