Effects of curing systems on properties of high volume fine mineral powder RPC and appearance of hydrates

Juanhong Liu; Shaomin Song

doi:10.1007/s11595-010-0056-5

Journal of Wuhan University of Technology Materials Science Edition ›› 2010, Vol. 25 ›› Issue (4) : 619 -623. DOI: 10.1007/s11595-010-0056-5

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Effects of curing systems on properties of high volume fine mineral powder RPC and appearance of hydrates

Juanhong Liu ¹^,^{^a}
, Shaomin Song ²

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Abstract

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/m³ and 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.

Keywords

curing system / high volume / fine mineral powder / RPC / appearance of hydrates

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Juanhong Liu, Shaomin Song. Effects of curing systems on properties of high volume fine mineral powder RPC and appearance of hydrates. Journal of Wuhan University of Technology Materials Science Edition, 2010, 25(4): 619-623 DOI:10.1007/s11595-010-0056-5

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