Expansion behavior of portland cement mortars under sulfate attack

IMECH-IR > 力学所知识产出(1956-2008)

	Expansion behavior of portland cement mortars under sulfate attack
	Chen JK; Jiang MQ(蒋敏强); Yang DY
会议录名称	Key Engineering Materials
	2007
会议名称	Asian Pacific Conference for Fracture and Strength (APCFS'06)
会议日期	November 22, 2006 - November 25, 2006
会议地点	Sanya, Hainan Island, China
摘要	The expansion behaviors are studied on mortars at water-cement ratio (w/c)=0.4, 0.6, and 0.8, stored in sodium sulfate solutions with sulfate concentration of 0 ppm, 20,250 ppm, and 54,000 ppm, respectively. The mortars stored in control solution show no expansion, whereas the expansion of the ones exposed to sodium sulfate solutions occurs in two stages (i.e., "dormant" and "speedup" Stages). The high concentration of sulfate accelerates the expansion, but control of water-cement ratio (0.60 in this case) can put up higher resistance to sulfate attack. The XRD analysis shown that the macro-expansion depends on the formation and growth of both ettringite and gypsum. The analysis obtained by means of Sigmoidal Fit Method indicates that the microdamage evolution depends strongly on the average size of microvoids in the material.
关键词	Ettringite Mortars Sodium Sulfate Attack
WOS记录号	WOS:000252246301267
收录类别	CPCI-S ; EI
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60299
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Chen JK,Jiang MQ,Yang DY. Expansion behavior of portland cement mortars under sulfate attack[C]Key Engineering Materials,2007.

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