Effects of curing systems on properties of high volume fine mineral powder RPC and appearance of hydrates
Effects of curing systems on properties of high volume fine mineral powder RPC and appearance of hydrates
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DOI：
10.1007/s11595-010-0056-5
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发表时间：
2010-08
期刊：
影响因子：
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通讯作者：
Juanhong Liu;S. Song
中科院分区：
文献类型：
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作者：
Juanhong Liu;S. Song
研究了不同养护体系对高掺量细矿粉RPC（活性粉末混凝土）性能和水合物形貌的影响。实验结果表明，干热养护促进了细矿粉火山灰反应活性的发展；由于水泥含量低，水胶比为0.20，活性细矿粉含量高，RPC的强度在蒸汽养护和随后的干热养护后增加了200%左右。扫描电镜和能谱图表明：水胶比为0.16的高体积细矿粉RPC经过蒸汽养护和干热养护后，水合物的形貌没有明显变化；经过0.20水胶比的RPC后，水泥用量为150 kg/m3及更多钢渣粉进行干热养护，C-S-H的形貌发生了一定的变化，凝胶结构更加致密、分布均匀，C-S-H凝胶的Ca/Si由1.41下降到1.20左右。
The effects of different curing systems on the properties of high volume fine mineral powder RPC (reactive powder concrete) and the appearances of hydrates were studied. The experimental results show that dry-heating curing promotes the development of pozzolanic reactivity of fine mineral powder; due to low cement content, 0.20 water-bind ratio and high reactive fine mineral powder content, the strength of RPC increases by around 200% after steam curing and subsequent dry-heating curing. Scanning electron microscopy and energy spectrum diagram showed that: after the high volume fine mineral powder RPC with 0.16 water-bind ratio underwent steam curing and dry-heating curing, there was no significant change in the appearance of hydrates; after the RPC with 0.20 water-bind ratio, the cement content of 150 kg/m3and more steel slag powder underwent dry-heating curing, there was a certain change in the appearance of C-S-H, the structure of gel was more compact and was uniformly distributed, and the Ca/Si of C-S-H gel decreased from 1.41 to around 1.20.