STABILIZATION AND EXPERIMENTAL STUDY OF CLAY SOILS WITH NUTSHELL ASH

Abstract

This study seeks to investigate the behaviour of the material composed with addition of waste nutshell ash into the predetermined fine-grained soil in various amounts. For this purpose, a sample was prepared from 10 nutshell ash and soil mixtures at the rates of 3%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%and 20%ash plus coal by weight. The impact of Nutshell Ash clay sample on the cohesion and internal frictional angle (indirect bearing power) was experimentally examined. As a result of the experiments, it was found that c=94.13 kPa and ?' =10.97?was for clay additive of 3%, c=57.05 kPa and ?=18.09 ? was for clay additive of 15%, c=76.37 kPa and ?' 12.99 ? was for clay additive of 20%. The results were in line with the results of studies conducted with lime and fly ashes. As the amount of additive of the nutshell ash increases, c (cohesion) decreases and ?' (internal friction angle) increases. In other words, the bearing power increases. In general the most appropriate results were found in use of 15% waste nutshell ash. In conclusion, it was found that in addition to cement, lime and fly ashes, waste ash of nut shell can also be used in soil stabilization of road and airport runway.