THERMO-CHEMICAL STABILITY AND MECHANICAL PROPERTIES OF MORTAR MADE WITH CEMENT KILN DUST- BLENDED CEMENT | ||||
| ERJ. Engineering Research Journal | ||||
| Article 7, Volume 27, Issue 1, January 2004, Page 49-58 PDF (3.13 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2004.82610 | ||||
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| Authors | ||||
| Ayman x Gamal1; M.M Shoaib2; M.M Balaha1 | ||||
| 1Engineering Materials Dept, Zagazig University, Zagazig, Egypt. | ||||
| 2Chemistry Department, Faculty of Science, Zagazig University, Egypt. | ||||
| Abstract | ||||
| The aim of the present investigation is to study the effect of elevated temperature on the mineralogical structure, chemical characteristics and mechanical properties of mortar prepared from cement kiln dust -blended cement with proportion 5, 10, 15, 20% of two types of cement (OPC and BFSC). Cubical samples were cast, molded and cured under tap water for 28 days and then left in air under normal atmospheric conditions for about three years. These samples were subjected to elevated temperature: 300, 400, 500 and 600 °C for 2 hrs, then the compressive strength variation of the hardened samples were studied. Weight loss and X-Ray diffraction analysis were also used to investigate the phase transformations in these materials. Visual observation of macro-cracks created due to heating and the carbonation depths were also identified. Results of this investigation showed that, mortar strength is affected and gradual break down is observed, at temperatures up to 600°C, as well as with increasing of the blended cement kiln dust percent. The carbonation depth demonstrated by Ph.Ph. test for OPC-CKD is more than in case of BFSC-CKD blends especially at high temperature. The hardened mortars made with BFSC gives a thermal stability more than that in case of OPC samples. | ||||
| Keywords | ||||
| Cement Kiln Dust; OPC; BFSC; Thermal Stability; Surface Cracking; Phase Transformation | ||||
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