Controlled Low-Strength Materials Using Bagasse Ash and Fly Ash
T. Raghavendra, M. Sunil, and B. C. Udayashankar
Appears on pages(s):
bagasse ash; construction and demolition waste; controlled low-strength material (CLSM); fly ash; Marsh flow; phenomenological model; quarry dust
An increase in industrial and construction activities has resulted in the generation of wastes that consume large volumes of landfill spaces. Controlled low-strength materials (CLSMs) are an obvious choice for reuse of large quantities of these waste materials. This paper examines the fresh and hardened properties of CLSM mixtures produced using wastes such as bagasse ash and fly ash as pozzolanic materials, and broken hollow concrete blocks and quarry dust as fine aggregates. Engineering properties such as spread flow, Marsh flow, compressive strength, settlement, and density were investigated. Flow and strength phenomenological models were generated. The predicted values were also compared with Lagrange’s interpolation values and a new set of experimental
data. Results indicate that phenomenological models encourage the production of CLSM of required parameters instead of a conventional trial-and-error process. The use of fly ash, bagasse
ash, and quarry dust in large quantities increased water demand of the mixtures. Bagasse ash mixtures containing quarry dust resulted in lower strengths when compared to fly ash mixtures containing powdered hollow concrete blocks. All these wastes are encouraged to be reused in CLSM and, hence, reduce the burden on landfills.