Contribution of RHA Granules as Filler to Improve the Impact Resistance of Foamed Concrete

摘要

Foamed concrete as aerated concrete widely used in range of constructions application, no exception to structure shield. As structure shield is important to resist on impact loading. Whilst, Rice Husk Ash (RHA) as agro-waste potentials as filler for foamed concrete. RHA that is produced by uncontrolled burning under 700°C during ± 6 hours obtain the granules contain the carbon and porous. The granules of RHA may fill the porous in matrix foamed concrete without remove the characteristic the foamed concrete its self as aerated concrete. This investigation RHA has been used as a replacement for fine aggregate. Target density 1800 kg/m~3 of foamed concrete both of with and without RHA have been produced to compare their strength and characteristic of impact resistance. SEM and HDS test has been conducted to determine microstnicture and chemical composition of foamed concrete with RHA. The results showed that granules of RHA filled the porous and bonded with the denser part into matrix. The presence of granules of RHA has been changing the role of the air cell of porous in foamed concrete when it was subjected to impact loading. Also the granules of RHA give the foamed concrete denser without losing its characteristic of porous entirely.