Effect of Used Engine Oil to High Strength Microwave Incinerated Rice Husk Ash (MIRRA) Concrete

Waste utilization has been a common step taken is most country throughout the world.
Other than it could help minimize the depletion of natural resource, waste has no
economical value. This research discusses about the possibility of incorporating two
kinds of industrial waste; namely used engine oil and rice husk ash in concrete
manufacturing. A study was carried out to evaluate the effect of used engine oil to
concrete containing rice husk ash on both fresh and hardened concrete properties. Three
types of mixes with three different water-binder ratios were cast. Concrete mix with
I 0% rice husk ash was taken as the control, while the addition of used engine oil in the
concrete mix containing 10% of rice husk ash was fixed at 3% and 4% of used engine
oil. The results of slump, compressive strength, split tensile strength, and porosity of the
concrete were compared to the control mix in order to evaluate the effect of used engine
oil to concrete containing rice husk ash. The slump values were not obvious due to the
low water-binder ratio used, however, the additional of used engine oil helped in
refining the strength development of the concrete. The compressive strength has shown
20% increment, while split tensile strength has proven to rise about 1.6 times greater
than the control mix. The porosity also has shown about a I 0% reduction lower than the
concrete containing only rice husk ash. In conclusion, this study has able to demonstrate
the positive effect of used engine oil to concrete hardened properties in enhancing
concrete properties.