Preparation and research of early strength water reducing agent for non-steaming sleeper concrete
YU Xiaodong
GAO Hongyan
WANG Xiaoying
YUAN Kaixin
REN Longfang
XIA Jingliang
Abstract：An early strength polycarboxylate superplasticizer suitable for non-steam conditioned sleeper concrete was developed to solve the problem of low formwork turnover rate caused by insufficient strength of precast concrete in the early stage,while en-suring the workability and durability of concrete.Through orthogonal test,the basic process parameters were determined,and seven different monomers were selected to synthesize the mother liquor.The results showed that the basic synthesis process parameters were as follows:molar ratio of initiator to polyether monomer was 0.35,molar ratio of hydrogen peroxide to ascorbic acid was 5,mo-lar ratio of chain transfer agent to polyether monomer was 0.2,reaction temperature was 50℃,and when 0.23%of the superplasti-cizer synthesized using quaternary ammonium cationic methylacryloyloxyethyl trimethyl ammonium chloride was added,the 1-day,3-day,and 7-day compressive strengths of the concrete were 33.1 MPa,48.0 MPa,and 58.9 MPa,respectively;when 0.23%of the su-perplasticizer synthesized using N,N'-dimethylacrylamide with amide groups was added,the 1-day,3-day,and 7-day compressive strengths of the concrete were 30.6 MPa,47.6 MPa,and 58.5 MPa,respectively.
Keywords：non-steamsleeper concreteearly strengthpolycarboxylate superplasticizer
Publication Date：2026-02-25
Online Publishing Date：2026-03-25(First online date of this platform, not the publication date of the document)
Pages：5( 94-97,131 )