Volume No. 5 Issue No.: 2 Page No.: 322-329 October-December 201

 

AN EXPERIMENTAL INVESTIGATION ON STRENGTH PROPERTIES OF FLY ASH BLENDED SOILS TREATED WITH CEMENT

 

M. Sumesh*, Ajanta Kalita and Baleshwar Singh

Department of Civil Engineering, Indian Institute of Technology, Guwahati (INDIA)

 

Received on : July 10, 2010

 

ABSTRACT

 

For an effective disposal of fly ash avoiding environmental pollution, it is necessary to utilize it on a continuous basis for some beneficial purposes. Its bulk utilization is feasible through civil engineering applications. A laboratory testing program was designed to investigate the strength properties of a sandy soil and a clayey silt soil blended with a class F fly ash and cement. Fly ash was mixed in increasing proportions up to 90% by mass of the soil. Cement content was varied up to 2% of the combined mass of fly ash and soil. The test line-up included classification tests, compaction tests and unconfined compression tests. Curing periods up to 28 days were used. The test results indicate that the addition of fly ash plays an important role in the development of strength of the two soil types. The optimum fly ash content for the sand is above 65% and for the clayey silt is up to 35%. A little addition of cement even at 1% to the soil-fly ash mixes significantly increases the unconfined compressive strength.

 

Keywords : Environmental pollution, Fly ash, Cement, Unconfined compressive strength.

 

 

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