Adsorption properties of polycarboxylate ether-based superplasticizer on cement particles and their resultant dispersion  

作　　者：Jinyoung YOON Byoung Il CHOI Jae Hong KIM 

机构地区：[1]Department of Structural Engineering Research,Korea Institute of Civil Engineering and Building Technology(KICT),Goyang 10223,Republic of Korea [2]System Safety Research Department,Korea Shipbuilding and Offshore Engineering,Seongnam 13591,Republic of Korea [3]Department of Civil and Environmental Engineering,Korea Advanced Institute of Science and Technology,Daejeon 34141,Republic of Korea

出　　处：《Frontiers of Structural and Civil Engineering》2022年第4期506-514,共9页结构与土木工程前沿（英文版）

基　　金：supported by the National Research Foundation of Republic of Korea(NRF)funded by the Ministry of Education(NRF-2018R1D1A1B07047321).

摘　　要：The cement dispersion performance of a polycarboxylate(PCE)-based superplasticizer is highly related to their adsorption behaviors as a function of time.This study evaluated effects of PCEs on rheological properties of cementitious materials.First,characteristics of PCEs were characterized via permeation chromatography(GPC)and Fourier-transform infrared spectrometry(FT-IR).The adsorption behavior of single and blended PCEs on cementitious composites was identified using total organic carbon analyzer(TOC).Based on the measurement of PCE adsorption,the changes of rheological properties of cementitious materials as well as the number of dispersed cement particles were characterized using a rheometer and laser spectroscopy,respectively.The experimental results support the systematic mechanism of PCE adsorption,cement dispersion,and the decrease in viscosity of cementitious materials.

关 键 词：ADSORPTION POLYCARBOXYLATE SUPERPLASTICIZER rheology DISPERSION 

分 类 号：O64[理学—物理化学]