A Study on the Use of Waste Materials in Flexible Pavement
Keywords:
Bituminous Mix, Asphalt, Concrete Pavements, Aggregate, Design StrengthAbstract
Bituminous mixes are used in different spots in flexible roads development. Asphalt mix consists of asphalt/bitumen which are mixed together, laid down in layers and then compacted. When designed and executed under normal conditions asphaltic pavements perform quite satisfactorily but the performance of bituminous mixes is worse under different situations. Today’s asphaltic concrete pavements are expected to perform better as of what they are experiencing nowadays due to more amount of traffic, huge amount of loads and large variations in seasonal temperatures on daily basis that has been experienced in the past. Not only this, but asphaltic roads are seen to perform very poor when prone to moisture induced situations. Focussing on this problem, a lot of research work has been carried out on using admixtures in bituminous mixtures and in modifying the bitumen. Research have shown that by adding polymer to asphalt binders can enhance the interfacial cohesive bond between the aggregate and binder which in turn can enhance different characteristics/properties of the asphalt pavements to meet this increased demand. Also the admixture which has to be used in modifying the mix should satisfy both the strength requirements as well as economic aspects.
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