Effects of Organosilane-modified PCE on the Fluidity and Hydration Properties of Cement-Fly Ash Composite Binder  

作　　者：HE Yan LIU Shuhua JI Tao KONG Yaning SHUI Liangliang 何燕;LIU Shuhua;JI Tao;KONG Yaning;SHUI Liangliang(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Water System Science for Sponge City Construction,Wuhan University,Wuhan 430072,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;School of Architecture and Engineering,Nanjing Institute of Technology,Nanjing 211167,China;China West Construction Academy of Building Materials,Chengdu 610000,China;Shanghai Municipal Engineering Design Institute(Group)Co.Ltd.,Shanghai 200092,China)

机构地区：[1]School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China [2]State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China [3]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China [4]Hubei Key Laboratory of Water System Science for Sponge City Construction,Wuhan University,Wuhan 430072,China [5]State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China [6]School of Architecture and Engineering,Nanjing Institute of Technology,Nanjing 211167,China [7]China West Construction Academy of Building Materials,Chengdu 610000,China [8]Shanghai Municipal Engineering Design Institute(Group)Co.Ltd.,Shanghai 200092,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第6期1081-1089,共9页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Natural Science Foundation of China(51808369);the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(18KJB560016);the Opening Project of State Key Laboratory of Green Building Materials(YA-615);the State Key Laboratory of Silicate Building Materials(SYSJJ2018-09);Hubei Key Laboratory of Water System Science for Sponge City Construction(2019-01);the Construction System Science and Technology Project of Jiangsu Province(2018ZD049);the Natural Science Foundation of Suzhou University of Science and Technology(XKQ2018009)。

摘　　要：Effects of organosilane-modified PCE (OS-PCE) on the fluidity and the hydration properties of cement-fly ash (FA) composite binder were systematically analyzed.The experimental results show that OS-PCE possesses respectively 36.98% and 36.67% higher saturated adsorption amount on cement and FA,in comparison with ordinary PCE,and can contribute to higher fluidity of cement-FA composite binder.The addition of OS-PCE retards hydration process of cement-FA composite binder proportionally with the dosage of OS-PCE,but promotes the hydration kinetics of the composite binder.The reactivity enhancement is attributed to the well-dispersed FA by OS-PCE,which provides more nucleation sites for the reaction of heterogeneous C-S-H and enhances the contact with water to react with CH forming pozzolanic C-S-H.Well-distributed hydration products are exhibited in the hardened binder added with OS-PCE,with a large number of hydrated gels uniformly fill in the pores and gaps,which improves the compaction of the hardened structure.

关 键 词：cement fly ash organosilane-modified PCE FLUIDITY hydration properties 

分 类 号：TQ430.1[化学工程] TQ536.4