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Title:

An Evaluation of Warm Mix Asphalt Additives and Reclaimed Asphalt Pavement on Performance Properties of Asphalt Mixtures

Accession Number:

01372839

Record Type:

Component

Abstract:

The consumption of natural resources and climatic changes are regarded as key factors in the deterioration and disruption of ecosystems and the asphalt paving industry has been working to address these issues. Two features of the efforts directed towards sustainability have been in the use of warm mix asphalt (WMA) technologies and reclaimed asphalt pavement (RAP). The performance of three commonly used warm mix technologies: Advera, Evotherm J1 and Sasobit were examined in comparison to a control hot mix asphalt (HMA) mixture with respect to dynamic modulus and permanent deformation (flow number). Each mixture was developed using a performance grade 64-22 binder and two types of aggregates: limestone or quartzite. In addition, this study will look into whether WMA additives enable the production of high RAP content (30%) mixtures with comparable performance to HMA. Warm mix asphalt mixtures were prepared at 120°C and compacted at 110°C showed no concerns regarding workability or compactability even in mixtures incorporating 30% RAP. Dynamic modulus and flow number tests were conducted to assess the stiffness and permanent deformation resistance, respectively. The performance tests data suggests that there is a significant difference in the performance of HMA mixtures and the three WMA technologies investigated. Dynamic modulus data of WMA mixtures were consistently lower as compared to HMA. The incorporation of RAP increased the dynamic modulus of all mixtures but the HMA mixtures were still higher than the WMA mixtures. Finally, the rutting resistance of WMA mixtures was considerably lower compared to HMA mixes via flow number testing.

Supplemental Notes:

This paper was sponsored by TRB committee AFK30 Characteristics of Nonasphalt Components of Asphalt Paving Mixtures. The DVD Table of Contents lists the title of this paper as "Evaluation of Warm-Mix Asphalt Additives and Reclaimed Asphalt Pavement on Performance Properties of Asphalt Mixtures".

Monograph Accession #:

01362476

Report/Paper Numbers:

12-4469

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Rashwan, Mohamed
Williams, Ronald Christopher

Pagination:

16p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Subject Areas:

Highways; Materials; Pavements; I30: Materials

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-4469

Files:

TRIS, TRB

Created Date:

Feb 8 2012 5:24PM