Abstract
The influence of fibres in various level of density of foamed concrete to improve the performance characteristics has been investigated. Fibres used are in two different types which are synthetic (polypropylene fibre) and natural (kenaf fibre). Those fibres were cut into same length which is 15 mm with proportion of 3 % by volume in the design mix. The effects on modulus of elasticity and compressive strength are reported. Compared to plain foamed concrete, specimens filled with polypropylene (PP) fibre at 1,800 kg/m3 density of foamed concrete, caused about 40 % increase in modulus of elasticity and a 18 % increase in the compressive strength. However, kenaf fibre specimens at 1,800 kg/m3 density of foamed concrete caused a decrease in modulus of elasticity by about 29 % and decrease in compressive strength by about 21 %. These indicate a vital gain in the ductility and strength when foamed concrete incorporating with polypropylene (PP) fibre as compared to kenaf fibre reinforced foamed concrete.
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