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SOME MECHANICAL PROPERTIES OF PUMICE LIGHTWEIGHT AGGREGATE CONCRETE INCORPORATING RISE HUSK ASH | ||
| AL-TAQANI | ||
| Article 1, Volume 22, Issue 3, 2009, Pages 147-159 | ||
| Authors | ||
| Kawkab H. Al-Rawi; Mazin T. Al-Kuttan; ; a A. Al-Niemey | ||
| Abstract | ||
| At the present time, a considerable amount of works has been undertaken to investigate the mechanical properties of lightweight aggregate concrete. It is thus aimed in this work to investigate the possibility of using local pumice rocks (available in the north of Iraq ) for the production of structural lightweight aggregate concrete. In this investigation, two types of lightweight concrete ( LWC) were produced using pumice stone as a coarse aggregate with natural sand and also with fine pumice aggregate, the effect of incorporating high range water reducing admixture (HRWRA) synergistically with 8% rice husk ash (RHA), as a partial replacement by weight of cement, on the mechanical properties of LWAC were investigated. Hardened unit weight, compressive strength and splitting tensile strength were investigated for all types of lightweight aggregate concrete and at various ages of curing. The inclusion of 8% RHA, as a partial replacement by weight of cement, with the optimum dosage of HRWRA ( 6% by weight of cement ) showed considerable increase in mechanical properties at all ages of curing compared with the reference concrete.Key words : lightweight concrete , pumice , admixture , lightweight aggregate concrete . | ||
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