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ÇELİK, Osman Nuri (2001)
Publisher: TUBITAK
Journal: Turkish Journal of Engineering and Environmental Sciences
Languages: English
Types: Article
Subjects: Fatigue, Asphaltic concrete, Modified bitumen
Pavement failure can be manifested by excessive cracking due to fatigue. Highway pavements are subjected to a repeated passage of wheel loading of varying magnitude and intensity. Fatigue has been defined as the phenomenon of fracture under repeated or fluctuating stress having a maximum value less than the tensile strength of the material. This paper examines a laboratory characterisation of the fatigue behaviour of rubberised asphaltic concrete and assesses the effect of waste shredded rubber on its fatigue properties. The constant stress mode of testing is used to determine the fatigue life of beam specimens. The objectives of the test programme are to determine the effect of waste shredded rubber modified bitumen on the fatigue behaviour of asphaltic concrete beam specimens and to evaluate the effect of varying binder content (0.5 per cent above and below the optimum binder content) on the fatigue life of asphaltic concrete. The addition of the rubber is highly significant on the fatigue life of asphaltic concrete. Even 5% of rubber addition increased the fatigue life of the mixture twofold for the modified binder made with the 50 pen. base bitumen and 23 times for the binder made with the 100 pen. base bitumen.
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