Use of Reclaimed Asphalt Pavement and Recycled Waste Glass as Partial Aggregate Replacements in Concrete Pavements

This paper investigates the optimal ratio of reclaimed asphalt pavement (RAP) and recycled waste glass (RWG) in concrete pavements ensuring the standard structural strength and reducing the environmental costs. The absorption, compressive, flexural and splitting tensile strength tests were carried out on three groups of concrete specimens comprised of varying proportions of RAP and RWG. The laboratory experiments showed that concrete specimens containing recycled materials had better structural quality than that of controlled specimens with virgin aggregates. The specimens with 15% RAP and 15% RWG increased the compressive, splitting tensile and flexural strength by 9.36, 1 and 3.88%, respectively. The concrete blocks with 10% RAP and 20% RWG increased the compressive, splitting tensile and flexural strength by 18.77, 48.9 and 3.09%, respectively. The mixture of RAP and RWG in the concrete pavement would offset the environment impact of road construction by reducing the demand for virgin aggregates and pavement thickness.