Design and properties of high reclaimed asphalt pavement with RH-WMA

L. Gungat, M. O. Hamzah, Nur Izzi Md Yusoff, S. W. Goh

Research output: Contribution to journalConference article

Abstract

Economic and environmental benefits gain from the recycling of old pavement promotes the use of reclaimed asphalt pavement (RAP) in the road construction and rehabilitation. However, high production temperature due to RAP stiffness becomes the main concern in the production of RAP. Reduced production temperature with the addition of warm mix asphalt (WMA) may compensate for aging of RAP binder, nevertheless the stiffness of RAP binder is depending on how much it ages and needs localised investigation for a bulk production of RAP. This research investigates the mix design and properties of high RAP content incorporating a WMA additive for a bulk RAP production in Malaysia. Milled RAP obtained from local roads were incorporated with a WMA named RH-WMA. Prior to addition of RAP into mixtures, the milled RAP were processed and characterized as a quality control of RAP from various sources. Mix design of mixture that contains RAP and 3% RH-WMA were performed using the Response Surface Method. Subsequently, the specimens were evaluated for its chemical and mechanical properties. The analysis on mix design showed that compaction temperature and bitumen content were significant factors. Reasonable reduction of optimum binder content and energy consumption were observed with the additions of RH-WMA. Tests on mechanical properties demonstrate increased on stiffness with the addition of RAP and hence reduced the fatigue resistance. However, the addition of RH-WMA on specimens that subjected to combined effects of moisture and aging showed improvement on fatigue resistance. Hence, with proper quality control of RAP material, the incorporation of RH-WMA into RAP indicated potential as an alternative material for green road construction.

Original languageEnglish
Article number012055
JournalIOP Conference Series: Materials Science and Engineering
Volume512
Issue number1
DOIs
Publication statusPublished - 24 Apr 2019
Event10th Malaysian Road Conference and Exhibition 2018 - Petaling Jaya, Selangor, Malaysia
Duration: 29 Oct 201831 Oct 2018

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asphalt
Asphalt pavements
Asphalt
Binders
Road construction
Stiffness

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Design and properties of high reclaimed asphalt pavement with RH-WMA. / Gungat, L.; Hamzah, M. O.; Md Yusoff, Nur Izzi; Goh, S. W.

In: IOP Conference Series: Materials Science and Engineering, Vol. 512, No. 1, 012055, 24.04.2019.

Research output: Contribution to journalConference article

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