STUDY ON ALKALI ACTIVATED FLY ASH FOR STABILIZATION OF BLACK COTTON SOIL
Keywords:
Expansive soil, alkali activated fly ash, compaction, Atterberg’s limits, CBR, UCS.Abstract
The Stabilization of Expansive soil has a great importance now days and several methods and materials have
been suggested for effective stabilization of these expansive soils, This analysis presents the stabilization of a local
expansive soil using alkali activated fly ash. First the basic properties of black cotton soil are found out, the fly ash of
different percentages such as 10, 20, 30, 40 and 50% are blended with black cotton soil and optimum dosage was
found out, The activated fly ashes at different alkali concentrations 0, 0.5, 1, 1.5 and 2 molarities are used to perform
tests. Different geotechnical properties like Atterberg’s limits, compaction, CBR and UCS of stabilized expansive soil
were tested. It was observed that there is a considerable improvement in geotechnical properties of expansive soil with
the addition of alkali activated fly ash and the results of alkali activated fly ash are found more suitable than normal
fly ash mix.
