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Study on Moisture Susceptibility of Foamed Warm Mix Asphalt

  • Yingbiao Wu
  • Qingyi Xiao
  • Jinjin Shi
  • Peiliang Zhang
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

Warm mix asphalt (WMA) is the asphalt concrete mixtures that are produced at lower temperatures than the hot mix asphalt. There are important environmental and health benefits associated with the reduced production temperatures and this can also potentially improve pavement performance. However, there exists one concern about the moisture damage of WMA because of the foaming water addition. The objective of the paper is to evaluate the moisture susceptibility of laboratory foamed WMA under moisture conditioning procedures and its laboratory-performance. Nuclear magnetic resonance (NMR) measurements was employed to evaluate the residual moisture content in the foamed asphalt. Two moisture conditioning procedures were used, including immersion Marshall test procedure and Lottman test freeze–thaw procedure. The moisture-conditioned specimens were tested using the marshall stability test, the indirect tension (IDT) tests, and the Hamburg wheel tracking test. Stripping Inflection Point (SIP) of Hamburg rutting test gave an indication of the time when the mixture begins to exhibit moisture damage. Both HMA’s and Formed WMA’s SIP were greater than 20,000 cycles, which indicated that the foamed WMA had almost same water resistance as HMA.Through comprehensive analysis, foaming water did not seem to have significant effects on moisture susceptibility.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Yingbiao Wu
    • 1
    • 2
  • Qingyi Xiao
    • 3
  • Jinjin Shi
    • 1
  • Peiliang Zhang
    • 1
  1. 1.Cangzhou Municipal Engineering Company LimitedCangzhouChina
  2. 2.Hebei Province Road Materials and Technology Engineering Technology Research CenterCangzhouChina
  3. 3.School of Civil EngineeringCivil Engineering Research Center of Hebei Province, Hebei University of TechnologyTianjinChina

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