Author: Gözde İNAN, Alper SEZER, Kambiz RAMYAR, H.Recep YILMAZ
Publishing Date: 2005
Volume 20 Issue 1
This paper presents an experimental investigation into the stabilization of a soft clay obtained from a military zone in Izmir with two different fly ashes. 5, 10, 15 and 20 % by weight of the soil was replaced with fly ash. In addition to the neat soil sample, the optimum moisture contents and maximum dry unit weights of four soil-fly ash mixtures prepared from each fly ash were determined by Standard Proctor Tests. The unconfined compressive strengths of the samples prepared at optimum moisture contents were determined at 1, 7, 28 and 90 days. It was found that, inclusion of fly ash improved the properties of the soil. The improvements were more pronounced with increasing fly ash content of the mixture and lime content of the fly ash. The fact was attributed to the pozzolanic reaction and pore refinement effect of fly ash as well as its free lime content.
Key Words: Stabilization; fly ash; soft clay; unconfined compressive strength.