Calcium carbonate is used in the production of asphalt concrete for road pavements. It enhances the performance of the asphalt concrete, making it durable thereby prolonging its service life.
It acts as a filler and an anti-stripping agent. As a filler, it improves the mechanical resistance of the concrete mixture and provides a consistent material that is easy to work with. As an anti-stripping agent, it helps to strengthen the adhesion of bitumen to surfaces of the aggregates and binds them into a cohesive mass with high resistance to the penetration of water. It also slows down age hardening
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