Development of blending chart for different degrees of blending of RAP binder and virgin binder

Prashant Shirodkar, Yusuf Mehta, Aaron Nolan, Eric Dubois, Darren Reger and Leslie McCarthy

Resources, Conservation & Recycling, 2013, vol. 73, issue C, 156-161

Abstract: Recent studies have consistently shown that RAP mixed with virgin binder and aggregates results in partial blending; that is, a phase between 100% blending and the “black rock” effect occurs. The impact of partial blending on new virgin binder content is apparent and may cause under-asphalting of mixture, resulting in poor pavement performance. Influence of partial blending on critical grade of RAP mixes and allowable percentages of RAP have not been evaluated. The purpose of this paper is to develop the blending chart for different degrees of blending to study the impacts of partial blending on the critical grade of blended binder. To achieve the objective, blending charts for 100%, 70% and 50% degree of blending have been developed for PG 70-28 and PG 58-28 binder by mixing virgin and RAP binders in differing proportions. The higher critical grade of blended binder does not change for different degrees of blending (70% and 50%) for low percentages of RAP binder (25% and 35%) with PG 70-28 binder. However, for high percentages of RAP binder (50%) and low degree of blending (50%), higher critical grade of blended binder can cause grade change.

Keywords: Reclaimed asphalt pavement; Blending chart; Binder degree of blending (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S092134491300027X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:73:y:2013:i:c:p:156-161

DOI: 10.1016/j.resconrec.2013.01.018

Access Statistics for this article

Resources, Conservation & Recycling is currently edited by Ming Xu

More articles in Resources, Conservation & Recycling from Elsevier
Bibliographic data for series maintained by Kai Meng ().