硅酸盐通报2018，Vol.37Issue(1)：210-214,5.
低品位粉煤灰的改性及其对水泥浆体强度和自收缩的影响
Modification of Low Grade Fly Ashes and Its Effect on the Strength and Autogenous Shrinkage of Cement Pastes
摘要
Abstract
The low grade fly ashes were modified through mixing with limestone.The microstructure, mineral phases and chemical compositions of the modified fly ashes were analyzed by using X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectrometer(EDS).In addition,the effects of modified fly ashes on the strength and autogenous shrinkage of cement pastes were investigated,and the microstructure of cement pastes with the modified fly ashes were studied by the backscattered electron microscope(BSEM)and mercury intrusion porosimetry(MIP).The results show that β-C2S phase is formed on the surface of the modified fly ash particles, the hydration of β-C2S can generate C-S-H gels,the interface between cement matrix and fly ash particles improves,the porosity and the autogenous shrinkage of blended cement pastes decreases,and the strength of blended cement pastes improves.关键词
粉煤灰/改性/强度/自收缩Key words
fly ash/modification/strength/autogenous shrinkage分类
建筑与水利引用本文复制引用
张世华..低品位粉煤灰的改性及其对水泥浆体强度和自收缩的影响[J].硅酸盐通报,2018,37(1):210-214,5.基金项目
福建省宁德市科技局项目(20150180) （20150180）
