Study the Effect of Waste Materials Ash (Date Seed Ash) on Expansive Soil

Abstract Expansive soils experience volumetric expansion as they absorb water, resulting in pressure being exerted on the foundation soils and causing movement of the foundation. The forces generated by these variations in volume may cause substantial damage to the buildings above them. Date seeds are the leftover material from certain facilities that make date syrup. Laboratory experiments were conducted to examine the effects of DSA work as a soil stabilizer on the expansive soil’s compressibility and expansion. Four different amounts of DSA (6%, 9%, 12 and 15%) were added to the bentonite soil to investigate the effect of DSA on bentonite soil properties. Compaction, Atterberg limits, and unconfined compression tests are selected to investigate the mechanical and swelling improvement in bentonite soil. According to test findings, adding DSA reduced bentonite soil’s plasticity and expansive index with increasing DSA ratios. The unconfined compressive strength test was conducted during three curing ages (0, 7 and 28) curing ages day, and the best results were obtained when using 9% of DSA as stabilizer materials.