Performance of field produced rejuvenated 30% RAP surface mix in Northwest Iowa

Joseph H Podolsky; Ali Arabzadeh; Barrie Saw; R. Christopher Williams; Eric W Cochran; Hosin Lee

doi:10.1080/14680629.2021.1898451

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Performance of field produced rejuvenated 30% RAP surface mix in Northwest Iowa

Journal article

Peer reviewed

Performance of field produced rejuvenated 30% RAP surface mix in Northwest Iowa

Joseph H Podolsky, Ali Arabzadeh, Barrie Saw, R. Christopher Williams, Eric W Cochran and Hosin Lee

Road materials and pavement design, Vol.23(6), pp.1451-1466

06/2022

DOI: 10.1080/14680629.2021.1898451

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Abstract

In this research, as part of a broad investigation, it was determined that 3.6% epoxidized methyl soyate (EMS) by weight of PG 58-34H binder (0.125% by total mix weight) was needed to achieve a PG 52-40H binder due to there being 30% RAP in the mix design (29.80% in the total binder content). Both lab and field produced mix verification showed that 0.125% EMS met the criteria for moisture susceptibility/rutting and low temperature cracking according to Iowa DOT specifications. For comparison purposes, there was a Control mix (PG 58-34H binder and 18% RAP) with no rejuvenator, and a 30% RAP mix design made using a commercial tall oil derivative (CTOD) rejuvenator from the contractor of which both met Iowa DOT criteria for low temperature cracking, but that the Control group did not have adequate rutting performance for a binder rated as PG 58-34H. Initial comparisons between lab low temperature mix performance from field produced and lab compacted specimens to field transverse cracking measurements (1 year after construction) lined up fairly well with trends from previous works for all three groups.

epoxidised methyl soyate

field density

low temperature cracking

Restorative reactive modifier

rutting

superpave

Details

Title: Subtitle: Performance of field produced rejuvenated 30% RAP surface mix in Northwest Iowa
Creators: Joseph H Podolsky - Iowa State University
Ali Arabzadeh - Iowa State University
Barrie Saw - NXP Semiconductors
R. Christopher Williams - Iowa State University
Eric W Cochran - Iowa State University
Hosin Lee - University of Iowa
Resource Type: Journal article
Publication Details: Road materials and pavement design, Vol.23(6), pp.1451-1466
DOI: 10.1080/14680629.2021.1898451
ISSN: 1468-0629
eISSN: 2164-7402
Publisher: Taylor & Francis
Language: English
Electronic publication date: 03/16/2021
Date published: 06/2022
Academic Unit: Civil and Environmental Engineering; International Programs
Record Identifier: 9984197067002771

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