EFFECT OF SAW DUST ASH AND FLY ASH ON STABILITY OF EXPANSIVE SOIL

Naranagowda M J, Nithin N S, Maruthi K S, Mosin Khan D S

Abstract: This study is focused on evaluating the effects of saw dust ash and fly ash on properties of laterite soil. These soils tend to have low shear strength and further it may lose shear strength in presence of moisture. This undesirable engineering property of the soil may cause potential natural hazard. These soils are plastic, compressible and expansive in nature which has the tendency to swell in presence of moisture and shrink in dried condition. Fly ash and saw dust ash which are disposed materials from industries are used in the stabilization process to improve the properties of soil. Fly ash is a cementatious material which reduces the swell of the soil when added in proper proportion. Saw dust ash by itself has a little cementatious property in addition with the presence of moisture it influences to the strength and compressibility characteristics of soil. The tests that are carried out on the natural soil sample are specific gravity, consistency limits, CBR, compaction, UCC and differential swell index. Further these tests were carried out on stabilized state of soil by adding 5, 10, and 15 of fly ash and saw dust ash. The results gives the effect of fly ash and saw dust ash on geotechnical properties of laterite soil.

Keywords: FA-Fly Ash, SDA-Sawdust Ash, Stabilization, CBR-California Bearing Ratio, UCC-Unconfined Compression Test

DOI: https://doi.org/10.15623/ijret.2015.0407013