Effects of reclaimed asphalt pavement content and virgin binder grade on properties of plant produced mixtures

• Published in: Road materials and pavement design 2012-06, Vol.13 (sup1), p.161-182
• Main Authors: McDaniel, Rebecca S., Shah, Ayesha, Huber, Gerald A., Copeland, Audrey
• Format: Article
• Language: English
• Subjects: Applied sciences; Asphalt pavements; Bitumen. Tars. Bituminous binders and bituminous concretes; Buildings. Public works; dynamic modulus; Exact sciences and technology; Green buildings; Materials; reclaimed asphalt pavement; Recovery materials; recycling; Roads & highways; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses
• ISSN: 1468-0629; 2164-7402
• DOI: 10.1080/14680629.2012.657066

This paper presents the results of a study to evaluate the mixture properties of plant-produced asphalt mixtures containing up to 40% reclaimed asphalt pavement (RAP). Five sets of asphalt mixtures were tested to determine their dynamic moduli and low temperature tensile creep compliance and strength. The mixture moduli were analyzed to assess changes in mixture behavior over a range of temperatures (frequencies) and in combination with extracted binder properties to analyze the extent of binder blending in the mix. The low temperature test results were analyzed to predict the critical cracking temperature of the mixtures. The results suggest that, for these materials, up to 25% RAP could be added to the mix with no change in the virgin binder grade without detriment to the low temperature properties of the mix.