The Effect of polypropylene fibres on the tensile performance of asphalt mixtures for road pavements

Abstract

The tensile strength of asphalt mixtures is one of the main parameters of deterioration and failure in flexible pavements. Hence, in this study, the effects of reinforcing asphalt mixtures, using polypropylene fibers, on their engineering performance were experimentally investigated. A set of cylindrical specimens of asphalt mixtures was prepared and subjected to a compressive load at different testing temperatures in terms of evaluation of the indirect tensile stiffness modulus. Similarly, fatigue (four-point bending) and crack propagate (three-point bending) tests were conducted for different asphalt mixtures made with and without polypropylene fibres. The impacts of such fibres on the engineering properties of asphalt mixtures were studied. The laboratory results revealed that the reinforced mixtures with polypropylene fibres had a noticeable influence on the tensile, fatigue and cracking initiation and propagation of these mixtures.

Investigations on mechanical and durability properties for pavement quality concrete using hybrid fibres

“…It is observed that there is an increment in the permeability value with the increase in the content of PP fiber. This is due to an increase in the PP fiber content increases the air content in the mixture volume [28]. However, the slight addition of PP fiber gave the least permeability value in the mixture.…”

The future of eco-friendly cold mix asphalt

“…740 Several techniques have been applied in order to improve flexible pavements. During 744 bituminous mixture manufacturing, stiffness and cohesion can be developed by the addition of 745 fibres [138][139][140][141][142]. This is an effective technique to enhance pavement behaviour when they do 746 not meet traffic, climate and pavement structural requirements.…”