Abstract

Controlled low strength material (CLSM) is a highly flowable material comprised water, cement, and fly ash
(FA) but often contain waste by-product material. These are characterized by very high workability and lesser
compressive strength. CLSM is used mainly for filling cavities and trenches in civil engineering works where
the application of granular fill is either impossible or difficult. CLSM’s are engineered materials that have a
specified compressive strength of 8.3 MPa or less at 28 days. If future excavation is desired, the compressive
strength should be <1.03 MPa. In the present study, fresh and hardened properties of CLSM formed by combining
the cinder aggregates along with Class F FA are being investigated. The samples were prepared using different
proportions of cinder and FA to study its performance.