Rice husk ash (RHA) is classified as a highly reactive pozzolan. It has a very high silica content similar to that of silica\nfume (SF). Using less-expensive and locally available RHA as a mineral admixture in concrete brings ample benefits to the costs,\nthe technical properties of concrete as well as to the environment. An experimental study of the effect of RHA blending on\nwork ability, strength and durability of high performance fine-grained concrete (HPFGC) is presented. The results show that the\naddition of RHA to HPFGC improved significantly compressive strength, splitting tensile strength and chloride penetration\nresistance. Interestingly, the ratio of compressive strength to splitting tensile strength of HPFGC was lower than that of ordinary\nconcrete, especially for the concrete made with 20 % RHA. Compressive strength and splitting tensile strength of HPFGC\ncontaining RHA was similar and slightly higher, respectively, than for HPFGC containing SF. Chloride penetration resistance of\nHPFGC containing 10ââ?¬â??15 % RHA was comparable with that of HPFGC containing 10 % SF.
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