Utilizing RAP Materials in Roller Compacted Concrete

With the escalating demand for sustainable construction materials, the utilization of Reclaimed Asphalt Pavement (RAP) in Roller Compacted Concrete (RCC) emerges as a promising solution. Dr. Solomon Debbarma, Assistant Professor, Department of Civil Engineering, IIT Bombay, examines the potential of RAP incorporation in RCC, addressing challenges and exploring avenues for enhanced mechanical performance and environmental sustainability.

Picture courtesy: Dynapac

Depletion of good quality virgin aggregates, an increasing amount of RAP stockpiles, and restricted allowable RAP usage in Portland Cement Concrete (PCC) motivates the use of reclaimed asphalt pavement (RAP) as a virgin aggregate replacement, for production of low-cost paving mixes like roller-compacted concrete (RCC) pavements. Savings associated with RCC over PCC are primarily due to reduced cement content, reduced forming and placement costs, and reduced construction times. Moreover, RCC needs no forms or finishing, and there are no dowels, tie rods, or steel reinforcement.

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