Abstract

FIGUEROA INFANTE, Ana Sofía et al. Analysing polystyrene-modified asphalt and its incidence in a heat-dense asphalt mixture. Ing. Investig. [online]. 2007, vol.27, n.3, pp.5-15. ISSN 0120-5609.

This article presents some results obtained with an MDC-2 asphalt/polystyrene-modified asphalt mixture as a result of crushing waste glass. The stone, asphalt and polystyrene materials’ were characterised for drawing up the design. The Marshal method was used for obtaining the best asphalt-stone-polystyrene percentages. The Superpave method was used for analysing the asphalt; the mixture’s dynamic behaviour was analysed using a test involving 20ºC and 30ºC trapezoidal fatigue for 90x10^-6, 150x10^-6 and 220x10^-6m deformation. The truck-wheel test was analysed for a 13-ton load, similar to that of the heaviest axle on a Transmilenio (articulated) bus. The dynamic module test was analysed for 15ºC, 20ºC and 30ºC and 2.5, 5 and 10 Hz frequencies. Conventional asphalt mixture and modified asphalt results were contrasted, interesting behaviour being observed regarding plastic deformation of the modified mixture in service

Keywords : modified asphalt; asphalt; polystyrene; pavement; bituminous mixture fatigue.

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