Effect of Temperature Changes on the Unconfined Compressive Strength of OPC Stabilized Engineering Soil with Palm Bunch Ash, PBA as Admixture

Abstract

Nowadays, waste product such as Palm Bunch Ash (PBA) is produced in large quantities from the agriculture industry on a daily basis. Improper disposal of the agricultural wastes at landfills contribute to environmental pollution. The cost of construction material increases when the demand is high. Therefore, reutilization of these waste products not only reduces the cost of construction material but also minimizes waste disposal problem. In this research, ''The Effect of Temperature on Ordinary Portland Cement Stabilization of Engineering Soil using Palm Bunch Ash as Admixture'', The compressive strength of the (Laterite + cement + palm bunch ash ) specimen cured for 14 days was studied and found to have more strength than that of the 7 days curing period. The addition of palm bunch ash from 0% to 10 % was found to have increase in strength from 23^oC to 60^oC and records its maximum strength at 60^oC which later reduces slightly from 80^oC to 100^oC, hence its maximum strength was acquired at 60^oC. It was observed that the specimen placed at room temperature has a higher strength than that of 100^oC. The specimen subjected to 100^oC was observed to have the lowest strength for both 7 and 14 days cured specimen. From the compaction test, the optimum moisture content increased from 11.7% to 17.6% considering 0% to 10% addition of Palm Bunch Ash while the Maximum Dry Density decreases from 1860kg/m³to 1730kg/m³for 0% to 10% addition of PBA admixture and  the CBR increased from 82% to 93% with the increase in Palm Bunch Ash addition.

Keywords: Temperature changes, unconfined compressive strength, palm bunch ash, ordinary Portland cement, admixture.