Combined effect of reclaimed asphalt and selected binders on stiffness and low-temperature characteristics of high stiffness modulus asphalt concrete

Author(s): K. Miláčková, J. Valentin, P. Mondschein
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 171-178
Total Pages: 8
Language: English

High stiffness modulus asphalt concretes (HMAC) are used as a high performance asphalt layer with increased bearing capacity and generally improved durability. HMAC are used in binder or base courses for pavement structures exposed to high traffic loadings. Because of expected long durability this mix type should fulfill enhanced requirements on stiffness and fatigue properties. Within the research done standard HMAC mix design has been used and 30 % of aggregates have been replaced by sorted reclaimed asphalt material. At the same time a rejuvenating additive and two different viscosity improving additives have been used with standard 50/70 bitumen. For low temperature behavior characterization three test methods have been used (crack propagation test, flexural strength test on asphalt beams, relaxation behavior on asphalt beams and thermal stress restrained specimen test). Selected tests have been compared for mixes with and without RAP to identify the effect of recycled material on mix performance. The objective was to analyze behavior of each designed HMAC variant and compare with commonly recommended threshold limits. Stiffness has been assessed as well using non-destructive indirect tensile stress test.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00