The Mechanical Properties ofMIRHA Foamed Concrete

The study deliberates on the incorporation of Microwave Incinerated Rice Husk Ash
(MIRHA) as a cement replacement material to produce foamed concrete. The mixes
incorporating 0%, 5%, 10% and 15% MIRHA were prepared. The optimal mix design
of MIRHA based on the mechanical properties is established. During this study, the
research on RHA as cement replacement material is conducted. Besides, analysis of
concretes characteristics are done for hardened concrete while the workability test is
done for fresh concrete. This research adopts Taguchi approach with an Ll6 (45) to
reduce the numbers of experiment. The optimal mix design properties are determined
by using analysis of variance (ANOVA) method. The results obtained from this
research shows that by adding MIRHA into foamed concrete, early strength can be
developed within 3 to 7 days because it has fasten the reaction in the concrete. Beside
that, as the optimal MIRHA that was found in this research is 5%, the data shows that
the target strength of foam concrete according to load bearing which is 17 Mpa has
been achieved.