مقالههای M.N.N. Khana
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
اطلاعات انتشار: World Applied Sciences Journal، سي و دوم،شماره۵، ۲۰۱۴، سال ۰
تعداد صفحات: ۱۴
The applications of pozzolans in cementitious system are becoming alternative source of cement day by day. This pozzolans contribute in mortar and concrete by two fold of effects, one is filler effect and another is pozzolanic effect. Among pozzolanic materials rice husk ash (RHA) shows good pozzolanic behavior due to its high silica content. The amorphous form of silica found in properly burnt and ground RHA is mainly responsible for pozzolanic reaction. When RHA partially applied in mortar and concrete, the chemical reaction between cement hydration product and silica produced secondary C–S–H gel. As a result, concrete achieveshigher strength due to secondary binder compared to control specimen. The long termsustainability of RHA–mixed concrete and mortar against all negative environmental components is comparatively better than conventional concrete and mortar. A critical review on compressive strength of concrete and mortar incorporating RHA has been described in this paper based onvariouspublished literatures. Beside this, durability performance RHA–mixed concrete and mortar such as resistance to chloride, corrosion, sulfate, acid attack, depth of carbonation, water absorption, sorptivity and drying shrinkage are discussed briefly. Furthermore, some recommendations are given for future research. Based on available literature related to the aim it can be concluded that if RHA is replaced up to certain limit then will be an alternate source of binder with better environmental acceptance.
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