Author(s):
Varsha Parmar, Prabha Padmakaran, Mohd. Akram Khan

Abstract:
Increasing use of CFBC technology for combustion of petroleum coke and other low calorific fuel offers high fuel efficiency and reduced coal utilization. India being the second largest ash producer in the world including petroleum coke fly ash with annual generation of 1,00,000 Metric Tons in an oil refinery located in Madhya Pradesh, India. The demand for its proper utilization and management is going up day-by-day. Coupled with the country’s growing population and expanding infrastructure, the demand for construction materials is also increasing. The production of conventional material results in substantial CO2 emission. Previous studies have discussed application of CFBC ash as cement (OPC, calcium sulphoaluminate, magnesium oxysulphate), concrete (AAC, RCC, NAAC), solid waste based zero cement binder (fly ash replacement of portland cement, AAC, magnesium sulphate cement, aggregates) have been discussed. However, challenges associated with CFBC ash are its porous and loose morphology, high water requirement, self- cementitious property and expansibility, which limits its potential uses and pose substantial challenges to human society. This review is focused on generation of CFBC ash, characterization of CFBC ash and advancement in processing techniques with focus on current and potential applications via waste management for industrial and societal benefits particularly for use in construction industry.

Pages: 544-559

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