Influence and Mechanism of Molecular Structure of PCEs on Viscosity of Cement Paste
YUAN Jin
SUN Zhenping
YANG Haijing
QIAN Yifei
TANG Xingtao
Abstract：Polycarboxylate ether based superplasticizers(PCEs)with different molecular structures were synthesized using isoprene alcohol polyoxyethylene ether(TPEG)and acrylic acid(AA)as raw materials.The mechanism of molecular structure of PCEs on the viscosity of cement paste was investigated by the fluidity,yield stress and plastic viscosity of cement paste doped with PCEs and the adsorption amount of PCEs on the surface of cement particles.The results show that PCEs with medium side chain length,characterized by molar mass of TPEG is 2 000 g/mol,an acid-ether ratio of 4.0,a chain transfer agent dosage of 0.4%,weight-average molecular weight of 49 600 g/mol,and the monomer is AA,can reduce the viscosity of cement pastes and exhibit an appropriate adsorption amount of PCEs on the cement particle surface.
Keywords：polycarboxylate ether based superplasticizeradsorption amountdispersion performancemolecular structureviscosity
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 103-109,117 )