Effect of oil shale on the Na+ solidification of red mud-fly ash cementitious material
Red mud-fly ash based cementitious material mixed with different content of oil shale calcined at 700℃ was investigated in this paper.The effect of active Si and Al content on the solidification of Na+ during the hydration process was determined by using XRD,27Al and 29Si MAS NMR,IR and SEM.It is shown that the content of oil shale has a remarkable effect on the solidified content of Na+.The hydration process generates a highly reactive intermediate gel phase formed by co-polymerisation of individual alumina and silicate species.This kind of gel is primarily considered as three-dimensional framework of SiO4 and AlO4 tetrahedron interlinked by the shared oxygen atoms randomly.The negative charges and four-coordinated Al inside the network are mainly charge-balanced by Na+.The solidifying mechanism of Na+ is greatly attributed to the forming of this kind of gel.
Red mud-fly ash based cementitious material (RFC) solidification mechanics hydration oil shale
Liu Xiaoming Li Yu Sun Henghu Cang Daqiang
State Key Laboratory of Advanced Metallurgy, University of Science and Technology of Beijing, Beijin Pacific Resources Research Center, School of Engineering and Computer Science, University of the Pac
国际会议
上海
英文
11-11
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）