Stabilization of Marine Clay Using Palm Bunch Ash: Fid-Bau Portal

Stabilization of Marine Clay Using Palm Bunch Ash

Oruabena, Bernard / Elechi, Okoh / Nelson, Ebiteisintei / Ugochukwu, Okiridu / Deinbofa, George

Stabilization of poorly subgrade soil is required to upgrade it to withstand construction loads by reducing compressibility, permeability and increasing the strength of the soil shear and load-bearing capacity. This paper presents the effects of Palm Bunch Ash (PBA) on soil properties such as liquid limits, plastic limits, plasticity index, compaction characteristics, unconfined compressive strength, Atterberg's limits, California bearing ratio (CBR), and Maximum dry density (MDD) in marine clay mangrove soil stabilization. In this work, a marine clay mangrove soil has been checked for its effect on strength characteristics by gradually adding palm bunch ash while observing the strength and load-bearing capacity of the soil. The expansive soil collected from Nembe, Bayelsa State, Southern Nigeria's was gradually stabilized by up to 30% PBA at an increment of 5%. Several additions were considered and the trend in properties shows a linear increase in OMC, CBR, and MDD, with increased addition of PBA. The addition of 10% of PBA resulted in an OMC increase from 1.65 to 1.70KN / m2 and 20% addition of PBA gave a UCS of 393.20kN / m2 in 28 days. A 5% addition of PBA resulted in a 200.23kN / m2 UCS. The level of reliability dropped as the PBA addition peaked at 53.3%. This result shows that UCS improved and stabilization is achieved when PBA is added to the expansive marine clay soil for the soaked and unsoaked conditions. The addition of palm bunch ash to marine clay soil improved the bearing capacity and the maximum dry density of the soil.