Study on the effects of polycarboxylate superplasticizer with different functional monomers on the performance of UHPC
CHENG Bo
GUAN Jia'nan
ZHANG Jianwen
HUANG Kening
LI Yafei
LIU Xiao
Abstract：Polycarboxylate superplasticizers(PCE)PC-1,PC-2,PC-3,PC-4 with different adsorption properties were synthesized using sodium allyl sulfonate,acrylic acid,maleic acid and methacrylic acid-2-hydroxyethyl phosphate as functional monomers,re-spectively.The adsorption behavior of PCEs with different functional monomers and their effects on the working and mechanical properties of ultra-high performance concrete(UHPC)were investigated.The results showed that the adsorption rate and adsorption amount of PCE(PC-1,PC-2,PC-3,PC-4)showed an increasing trend;compared with the blank sample,the initial slump of UHPC containing PC-1,PC-2,PC-3 and PC-4 increased by 242.9%,285.7%,328.6%,357.1%,respectively,and the 28 d compressive strength increased by 27.6%,37.8%,39.8%,and 41.8%,respectively.The 28 d flexural strength increased by 23.5%,47.1%,58.8%,and 64.7%,respectively.Although PC-4 has poor collapse resistance,it performs the best in terms of dispersion and improving the flexural and compressive strength of UHPC.
Keywords：polycarboxylate superplasticizerUHPCadsorptivitydispersitymechanical property
Publication Date：2025-09-25
Online Publishing Date：2025-10-15(First online date of this platform, not the publication date of the document)
Pages：4( 5-7,59 )