Article ID Journal Published Year Pages File Type
256309 Construction and Building Materials 2016 6 Pages PDF
Abstract

•The samples cured at 70% RH present more tetrahedrally coordinated aluminium.•More aluminium is taken up by the CSH gel in the samples cured at 70% RH.•The transformation of ettringite to AFm is promoted at 70% RH.•The samples cured at 98% RH present lower mean chain lengths of the CSH gel.

A study was conducted to investigate the effect of the curing relative humidity on the microstructural properties of SCC with limestone filler. Two curing conditions were considered with humidities of 98% and 70%. Three microstructural techniques were employed to study the hydration: TGA, Micro-Raman spectroscopy and NMR. It was found that the samples cured at 70% humidity present more tetrahedrally coordinated aluminium since more aluminium is taken up by the CSH gel and the transformation of ettringite to AFm is promoted. The samples cured at 98% humidity are more hydrated but present lower mean chain lengths of the CSH gel.

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Physical Sciences and Engineering Engineering Civil and Structural Engineering
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