Abstract
This chapter assesses the appropriateness and performance of glass cullet (GC) as an aggregate in road pavement, dealing with its use in unbound, hydraulically bound and bituminous bound applications. The California bearing ratio of GC has been found to be comparable to that of natural aggregate. In hydraulically bound applications, GC fine aggregate is shown to be compatible with other waste materials for use in subbase and base, such as steel slag, ladle furnace slag and foundry sand. The performance of GC in concrete rigid pavement was generally satisfactory. It is shown that the Marshall method can be adopted when designing bituminous mixtures made with GC in coarse, fine and filler aggregate size fractions. The use of GC at up to 10% does not adversely affect the stiffness modulus, rutting resistance or moisture damage resistance of bituminous mixtures. Antistripping agent is effective in improving the performance of mixtures containing GC. The material does not have a negative environmental impact. Case studies with GC in road pavement applications are also included.
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