【摘 要】
：
Composition,morphology,and structure of hydration products in hardened pastes of three kinds of blended cement (cement-silica fume,cement-quartz powder and cement-silica fume-quartz powder) hydrated under different curing regimes (standard curing,90 ℃ ste
【机 构】
：
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
Composition,morphology,and structure of hydration products in hardened pastes of three kinds of blended cement (cement-silica fume,cement-quartz powder and cement-silica fume-quartz powder) hydrated under different curing regimes (standard curing,90 ℃ steam curing,200 ℃ and 250 ℃ autoclave curing) were investigated by X-ray diffraction and field emission scanning electron microscope equipped with EDAX system.Results showed that the main hydration products in three kinds of hardened pastes under standard curing condition are all C-S-H gels,CH,and AFt.Under 90 ℃ steam curing condition,the main hydration products of cement-silica fume and cement-silica fume-quartz powder are C-S-H gels,whereas those of cement-quartz powder are C-S-H and CH.Under 200 or 250 ℃ autoclave curing condition,no obvious crystallized CH phase is found in hardened pastes of three kinds of blended cement,and C-S-H gels are transformed into one or more crystalline phases such as tobermorite,jennite,and xonotlite.The chemical composition and morphology of these crystalline phases depend on the composition of mixture and autoclave temperature.
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