Properties of Koh Yor Sandstone Aggregate Concrete Blended with Song Yod Rice Husk Ash
Keywords:
Song Yod rice husk ash,, Sandstone aggregate,, Pozzolanic reaction,, Hydration temperatureAbstract
The experimental investigation was carried out to evaluate the effectiveness of Song Yod rice husk ash (SYRHA) on the properties of fresh and hardened concrete containing Koh Yor sandstone coarse aggregates (KYSCA). The SYRHA was ground and partially replaced the ordinary Portland cement with the proportion of 15, 20 and 25% by weight. The water to cementitious material ratio is maintained at 0.55 for all mixtures. The KYSCA concrete samples cast in the mould of 10´10´10 cm and cured in water for 7 and 28 days and uncured. The examined properties include the bulk density, water absorption, Shore hardness and compressive strength. The highest compressive strength value was measured in the mixture containing 15% SYRHA cured 28 days while the lowest compressive strength value was noted in 25%SYRHA uncured. It is indicated that the SYRHA can be used as a pozzolanic material, replacing cement containing KYSCA as high strength concrete.
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