SOIL STABILISATION OF CLAYEY SOIL BY USING COAL ASH AND STONE DUST

The current study explores the best coal ash similar to the fly ash dosage for enhancing the soil's overall unconfined compressive strength. The two types of fly ash used come from the Southeast Asian region, respectively, and are both produced when coal is burned in a generator that generates electricity. A mixture of organic clays exhibiting modest to significant flexibility and inorganic silts makes up the soil, which was extracted from the paddy fields in the selected sector. UCS studies on moulds composed of pure soil and soil mixed with fly ash were conducted during curing durations of three, seven, fourteen, twenty-eight, and ninety days, with an optimal moisture content of 19%–24%. Observations show that pure soil's highest possible dry density is 1.615 g/cm3, and its OMC is 20.30% (Sneha et al., 2021). Fly ash and stone ash treatment results in an ultimate dry bulk density of 1.615 g/cm3 for the soil, which raises both OMC and MDD. When fly ash is applied, the soil's OMC and MDD increase. The increase in these two types of ash content allowed for identifying both the zone of activity and the degeneration zone of strength development.