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Pozzolanic characteristics of a natural raw material for use in blended cements | ||
| Iranian Journal of Science and Technology Transactions of Civil Engineering | ||
| شناسنامه علمی شماره، دوره 33، شماره 4، فروردین 2009، صفحه 291-300 اصل مقاله (591.43 K) | ||
| شناسه دیجیتال (DOI): 10.22099/ijstc.2009.707 | ||
| چکیده | ||
| In this study, the potential use of a natural raw material in the manufacture of blended cements was investigated. Mineralogical, petrographic and chemical analyses of the samples showed that the natural raw material was a porphyritic volcanic rock close to trachyandesite composition with a SiO2+Al2O3+Fe2O3 content of 79.86%. Further experiments were also designed to determine the physical properties and pozzolanic activity of the raw material. The mortar samples, made with a binder of ground trachyandesite and lime, developed compressive and flexural strengths of 2.5 and 3.3 times respectively higher than those required for a natural pozzolan. Further tests revealed that when the ground trachyandesite replaced 30% w/w of Portland cement, the blended cements produced had the desired physical and chemical characteristics with compressive strengths higher than 32.9 N/mm2. These findings suggest that this material can be used in the production of blended cements. | ||
| کلیدواژهها | ||
| Pozzolan؛ blended cement؛ physical properties؛ Mechanical properties | ||
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