Abstract
Asphalt pavement’s surfaces deteriorate over time due to combined effect of traffic and surrounding environment. Fatigue and rutting are the major distresses which cause failures in flexible pavements. Different temperature control computer operated equipment’s are being used worldwide to predict the performance of asphalt mixtures at approximately same condition to those in-service pavements. Similarly, different types of polymers such as elastomer and thermoplastic have been used all over the world in Hot Mix Asphalt (HMA) for the improvement of asphalt mixtures. But little attention has been taken to evaluate the effect of plastomer on hot mix asphalt performance. Moreover, the initial cost of elastomer is higher than other types of polymers such as plastomer. The aim of this research study is to check the effect of various plastomers on high/low temperature performance of asphalt mixture. Four performance tests like Cooper wheel tracker, dynamic modulus, uniaxial repeated load and four-point bending beam test are used to evaluate the effect of different type of plastomers such as polyethylene terephthalate, high density and low density polyethylene with limestone aggregate quarry and 60/70 pen grade asphalt binder. This research study concludes that plastomer increases flexibility and hardness of asphalt mixtures and improves the rut resistance, dynamic modulus and fatigue life of asphalt mixtures. Plastomer modification shows significant benefits as compared to neat binder for high/low temperature performance. Moreover, it can be concluded that plastomer provides an efficient and economical blend of asphalt mixture.
Highlights
Rutting and fatigue cracking are the normally occurring distresses in asphalt pavements
Bitumen is a material which is used for the construction of asphalt pavements and it has viscoelastic and thermoplastic properties, i.e. it behaves as an elastic solid at low temperature and under rapidly moving traffic conditions, it behaves as viscous fluid at high temperature and under slow moving traffic conditions [1, 2]
The rut performance of neat and modified asphalt mixtures was determined with Cooper wheel tracker test
Summary
Rutting and fatigue cracking are the normally occurring distresses in asphalt pavements. Bitumen is a material which is used for the construction of asphalt pavements and it has viscoelastic and thermoplastic properties, i.e. it behaves as an elastic solid at low temperature and under rapidly moving traffic conditions, it behaves as viscous fluid at high temperature and under slow moving traffic conditions [1, 2]. Rutting (Permanent deformation) and cracking (fatigue) are the major distresses which deteriorate the pavement at high and intermediate temperature. Permanent deformation and cracking due to fracture damage are the distresses in asphalt pavement which appear in the wheel track along the driving direction [4]. Flexible pavements undergo permanent deformation due to heavy and channelized traffic loading. Annihilation of flexible pavement due to occurrence of rutting in parallel direction of moving traffic may cause many traffic
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