Pond Ash–Based Controlled Low-Strength Materials for Pavement Applications

Abstract

Cement-based controlled low-strength material, also called flowable fill, is often used as both subbase and subgrade material in pavement construction. This article investigates the properties of a pond ash–based flowable fill with special reference to pavement applications. Properties such as flowability, unconfined compressive strength, California bearing ratio (CBR), and resilient modulus (MR) for different mixes were studied. It was observed that addition of 2–3 % of cement in the pond ash can make a good flowable fill without the need of any other admixtures. Substantial improvement in CBR and resilient modulus values were observed when compared with the compacted pond ash. The results of the study show that the pond-based flowable fill can be used as an effective alternative material for subbase and subgrade layers in pavements.