Effect of curing and heat treatment history on the dynamic mechanical response and the pore structure of hardened cement paste |
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Authors: | Fariborz Radjy Cedric W Richards |
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Affiliation: | Building Materials Laboratory Technical University of Denmark, 2800 Lyngby, Denmark;Department of Civil Engineering Stanford University, California, U.S.A. |
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Abstract: | Results for the dynamic mechanical response of hcp (hardened cement paste) specimens as a function of the curing-heat treatment history are reported. The temperature range investigated is from ?160°C to +100°C. In the temperature range from +25°C to +100°C, specimens cured at room temperature (R-cured) show a partially irreversible transition (reduction) in E. There are two low temperature transitions: the “adsorbate transition” between ?160°C and ?6-°C, and the “capillary transition” between ?50°C and 0°C. Both of these transitions are significantly affected by the curing-heat treatment history. Furthermore, both the E-modulus and the BET (water) surface area decrease as the severity of heat treatment increases. |
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