Effect of Curing Time on Compressive Strength Performance of Coconut Shell Charcoal Ash (CSCA) and Fly Ash Stabilized Peat Soil

Abstract

Peat soils are considered problematic soils and unstable for engineering projects due to geotechnical problems such as high compressibility and poor shear strength. Peatland could be an alternative to future development due to a lack of suitable and pricey land. Stabilization of the peat soil should be done before construction to improve its engineering features. The influence of curing time on the compressive strength performance of Coconut Shell Charcoal Ash (CSCA) with fly ash to stabilized peat is presented in this research. Some engineering variables including physical and mechanical properties were examined. The modified stabilized peat soils were made by adding various amounts of CSCA to the dry weight of the peat soil, ranging from 3%, 6%, 9%, and 12%, while fly ash constant 10%. The treated samples were cured for 0, 7, 14, and 28 days to see how curing affected the results. The results show that when the amount of CSCA with fly ash applied to the peat soil samples increased, the compressive strength also increased. On the other hand, showed that as the amount of CSCA with a constant fly ash content and the curing duration increased, so did the unconfined compressive strength test. The result shows that the addition of CSCA with fly ash into the mixture helps to stabilize and improve the strength of the soil.