Assessment of Fatigue Resistance of Additivated Asphalt Concrete Incorporating Fibers and Polymers

• Published in: Journal of materials in civil engineering 2014-03, Vol.26 (3), p.554-558
• Main Authors: Brovelli, Claudio, Crispino, Maurizio, Pais, Jorge C, Pereira, Paulo A. A
• Format: Article
• Language: English
• Subjects: Additives; Applied sciences; Asphalt; Assessments; Bitumen. Tars. Bituminous binders and bituminous concretes; Buildings. Public works; Dissipation; Exact sciences and technology; Fatigue life; Fatigue strength; Fatigue testing; Fatigue tests; Materials; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses; Technical Note; Technical Notes
• ISSN: 0899-1561; 1943-5533
• DOI: 10.1061/(ASCE)MT.1943-5533.0000837

AbstractThis paper reports the evaluation of fatigue response of asphalt mixtures produced with different additives, namely cellulose and synthetic fibers, amorphous polyolefin, and ethyl vinyl acetate (EVA), in comparison with conventional asphalt mixtures. The additive content was also analyzed by producing asphalt mixtures with 3, 6, and 9% of additive. Fatigue testing was performed with an indirect tensile test apparatus under controlled stress mode of loading. A comparative analysis of the fatigue resistance was carried out using the different methods. Fatigue life was defined using the classical approach in which the number of cycles reaches the double of initial deformation. It was also defined in terms of different methods based on dissipated energy: total dissipated energy, ratio of dissipated energy change, and plateau value. This paper offers an analysis of different methods of evaluating the indirect tensile fatigue test. The testing clearly shows that polymer modification may extend the fatigue life, and that energetic methods can be effectively applied to data from indirect tensile fatigue tests.