Influence of Polymeric Coating the Aggregate Surface on Moisture Damage of Hot Mix Asphalt

Authors

  • Mojtaba Khodadadi
    Affiliation

    Department of Civil & Environmental Engineering, Amirkabir University of Technology, PO Box: 4413-15875, Tehran, Iran

  • Alireza Azarhoosh
    Affiliation

    Department of Civil Engineering, University of Bojnord, Bojnord, PO Box: 9453155111, North Khorasan, Iran

  • Ali Khodaii
    Affiliation

    Department of Civil & Environmental Engineering, Amirkabir University of Technology, PO Box: 4413-15875, Tehran, Iran

https://doi.org/10.3311/PPci.14340

Abstract

Moisture damage is one of the common causes of asphalt pavement failure in moisture presence. One of the convenient approaches to decreasing moisture sensitivity in hot-mix asphalt is coating the aggregate surface with a suitable agent. In this study, the effects of polyethylene terephthalate on moisture damage of asphalt mixtures were evaluated by applying indirect tensile strength and resilient modulus tests. The asphalt specimens were prepared with two types of aggregates (granite and limestone) and neat asphalt binder of 60/70 penetration grade. The results showed that the ratio of wet/dry values of indirect tensile strength and resilient modulus for mixtures containing limestone was higher than those of the samples with granite aggregate. Furthermore, the results of the laboratory tests indicate that polyethylene terephthalate improves resistance to moisture susceptibility. Because polyethylene terephthalate increases the wettability of asphalt binder over the aggregate and the adhesion between the asphalt binder and aggregate, especially in the mixtures containing acidic (granite) aggregate prone to moisture damage.

Keywords:

hot mix asphalt, moisture damage, polyethylene terephthalate, indirect tensile strength, resilient modulus

Published Online

2020-11-30

How to Cite

Khodadadi, M., Azarhoosh, A., Khodaii, A. “Influence of Polymeric Coating the Aggregate Surface on Moisture Damage of Hot Mix Asphalt”, Periodica Polytechnica Civil Engineering, 65(2), pp. 376–384, 2021. https://doi.org/10.3311/PPci.14340

Issue

Section

Research Article