Compressive strength determination of bottom ash mixed with dust stone and portland cement

Abstract

This research was to determine the appropriated mixing ratio of bottom ash and admixture (dust rock and Portland cement type 1) for improving the compressive strength. Bottom ash was used instead of soil and the quantities of admixture were 0, 2, 4, 6, 8 and 10% by dry weight of bottom ash. The specimens were cured for 7, 14, 28 and 90 days. Results of compressive strength test show that the admixture of 8% was the best mixing ratio. The increasing primary strength is developed from hydration reaction and the increasing secondary strength at 90 days is developed from pozzolanic reaction. Moreover, the compressive strength of this specimen is close to the compressive strength of laterite