Optimizing Volumetric Properties and Performance of Asphalt Mixtures using Innovative Additives

Author(s): Hussain U. Bahia, Amir Arshad, Erik Lyngdal
Paper category: Proceedings
Book title: Proceedings of the International Conference on Advances in Construction Materials and Systems, Vol. 1
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-193-3
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 1-16
Total Pages: 16
Language : English

Abstract: Local agencies in the USA are implementing mixture performance specifications and allowing innovative materials to be included with less focus on Performance Grading (PG) of bitumen or volumetric requirements. With such opportunities, paving contractors are adopting new asphalt technologies that allow optimization of volumetric properties, mechanical performance, and cost. In this study examples of the effectiveness of specialty polymers to improve hot mix asphalt (HMA) performance while optimizing volumetric properties are discussed. Results show that low concentrations of specialty additives allow better aggregate particles packing during compaction, and improve adhesion, resulting in significantly improved HMA performance. Imaging analysis, Hamburg Wheel Tracking, Indirect Tension Fatigue tests, and Complex Modulus (E*) are conducted on select mixture designs with and without polymer modified binder to show that using specialty polymers allow better compaction, improved mortar film distribution, better rutting resistance and higher moduli. The study shows the potential for a cost-effective solution to contractors for formulating optimum mixture designs with more resistance to traffic and moisture related damage.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00