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http://dx.doi.org/10.12989/sem.2009.31.1.001

Effect of elevated temperature on physico-mechanical properties of metakaolin blended cement mortar  

Morsy, M.S. (Housing & Building National Research Center)
Rashad, A.M. (Housing & Building National Research Center)
El-Nouhy, H.A. (Housing & Building National Research Center)
Publication Information
Structural Engineering and Mechanics / v.31, no.1, 2009 , pp. 1-10 More about this Journal
Abstract
An experimental investigation was conducted to evaluate the performance of mortars with and without Metakaolin (MK) exposed to elevated temperatures $200^{\circ}C$, $400^{\circ}C$, $600^{\circ}C$ and $800^{\circ}C$ for two hours. The binder to sand ratio was kept constant (1:5.23). The ordinary Portland cement (OPC) was replaced with MK at 0%, 5%, 10% 20% and 30%. All mixtures were designed to have a flow of $94{\pm}5%$. The compressive strength of mortars before and after exposure to elevated temperature was determined. The formation of various decomposition phases were identified using X-ray diffractometry (XRD) and differential thermal analysis (DTA). The microstructure of the mortars was examined using scanning electron microscope (SEM). Test results indicated that MK improves the compressive strength before and after exposure to elevated temperature and that the 20% cement replacement of MK is the optimum percentage.
Keywords
elevated temperature resistance; metakaolin; mortar; microstructure; blended cement;
Citations & Related Records

Times Cited By Web Of Science : 3  (Related Records In Web of Science)
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