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, noexception to structure shield. As structure shield is important to resist on impact loading. Whilst, RiceHusk Ash (RHA) as agro-waste potentials as filler for foamed concrete. RHA that is produced byuncontrolled burning under 700ºC 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 characteristicthe foamed concrete its self as aerated concrete. This investigation RHA has been used as areplacement for fine aggregate. Target density 1800 kg/m3 of foamed concrete both of with andwithout RHA have been produced to compare their strength and characteristic of impact resistance.SEM and EDS test has been conducted to determine microstructure and chemical composition offoamed concrete with RHA. The results showed that granules of RHA filled the porous and bondedwith the denser part into matrix. The presence of granules of RHA has been changing the role of theair cell of porous in foamed concrete when it was subjected to impact loading. Also the granules ofRHA give the foamed concrete denser without losing its characteristic of porous entirely.