EXPERIMENTAL STUDY ON SHRINKAGE OF BLAST FURNACE SLAG CEMENT PASTES
This research was carried out to understand the relationship between shrinkagecharacteristic and microstructure of blast furnace slag cement. Cement pastes and mortarsincorporating ground granulated blast furnace slag (GGBS) at three levels of fineness and fourlevels replacement was produced and cured at 20±2℃Cand 50±4％ relative humidity(RH).Shrinkage of mortars and pastes, non-evaporable water content, calcium hydroxide(CH)content and pore structure were measured. The results indicated that the shrinkage of bothcement paste and mortar replaced by GGBS could be effectively restrained except when theslag powder fineness was 605m2/kg. For blast furnace slag cements, shrinkage of pasteslinearly increased with the non-evaporable water content. Porosity and volume fraction of bigpore in the cement pastes were decreased and volume fraction of small pores was wellcorrelated with drying shrinkage. The fact that CH was corroded by GGBS may be a reasonfor reducing shrinkage.
Qiang Song De-long Xu Xin-kai Hou
School of Material Science & Engineering,Xian University of Architecture & Technology,NO.13,Yanta R State Key Laboratory of Architecture Science and Technology in West China (XAUAT) School of Material Science & Engineering,Xian University of Architecture &Technology,NO.13,Yanta Ro
国际会议
南京
英文
925-931
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）