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Title of Journal: Sci China Technol Sci

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Abbravation: Science China Technological Sciences

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Science China Press

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10.1007/978-1-349-14738-0

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1869-1900

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Local porosity distribution of cement paste charac

Authors: KeShu Wan Qiong Xu
Publish Date: 2014/03/26
Volume: 57, Issue: 5, Pages: 953-961
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Abstract

Porosity is one of the most important parameters for cementbased materials which influences the mechanical property transport property and durability The spatial and frequency distributions of local porosity of cement pastes are characterized using Xray microtomography data and treating methods The 3D spatial distributions for three cement paste specimens with different water cement w/c ratios show reasonable heterogeneity The probability analysis also reveals this heterogeneity the representative volume element RVE size based on porosity maps decreases with w/c ratio firstly then increases with w/c ratio and the heterogeneity on the characterized probe size or on the RVE size increases with w/c ratio Average porosities obtained using the CT method are further compared with those by traditional methods

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