Production of controlled low-strength material (CLSM)

Abstract

Controlled low strength material is a self compacting, self leveling, low strength, cementitious material used primarily as a backfill in lieu of conventionally compacted fill. Potential advantages of CLSM include decreased labor requirements, faster construction speed, and potentially lower in-place cost. CLSM is a highly flowable material consisting of cement, fine and coarse aggregate. Some mixtures contain fly ash or other by product materials. CLSM compressive strength values are required to indicate a minimum strength for performance criteria and a maximum strength for future excavability.