Evaluation of the fatigue macro-cracking behavior of crumb rubber modified bituminous mixes
DOI:
https://doi.org/10.3989/mc.2014.07913Keywords:
Asphalt mixes, Crumb rubber, Fatigue cracking, Four-point bending testAbstract
The use of crumb rubber modified bitumen (CRMB) in asphalt mixes is a road engineering technology that has become increasingly important in recent years. Given the many economic and environmental benefits of this type of binder, the goal is to give CRMB the same level of performance as conventional polymer-modified bitumen. The appearance and propagation of cracks due to fatigue phenomena is one of the most common distresses affecting road pavements. Since crumb rubber enhances the mechanical properties of asphalt mixes, it can provide a viable solution for fatigue cracking. This paper presents the results of a comparative analysis of the fatigue-cracking behavior of asphalt mixtures manufactured with crumb rubber modified bitumen and polymer-modified bitumen.
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