Strength and Durability Properties Improvement of Bottom Ash Concrete using Ultra-Fine Slag Cementitious Material
Abhishek Sachdeva†, Pushpendra Kumar Sharma†*, Abhinav Kumar‡
† School of Civil Engineering, Lovely Professional University, Punjab, India.
‡ LIPS Research Foundation, Trivandrum, India.
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This paper describes the potential of coal bottom ash to be used as an alternative for fine aggregates which is a natural asset and depleting due to over-usage in concrete projects. A total of five different concentrations of coal bottom ash i.e. 10% to 50% have been analysed and results showed that coal bottom ash inclusion has affected the compressive strength, durability and quality of the concrete significantly, hence, bottom ash is not suitable in concrete projects. Furthermore, attempts have been made to revive the concrete properties by incorporating ultra-fine slag material i.e. Alccofine as an alternative to cement. Results showed that 15% replacement of cement with Alccofine in a 40% bottom ash concrete has enhanced the compressive strength and improved the concrete quality and durability of the concrete mixture.