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Title:

Revulcanization Investigation of Terminal Blend Rubberized Asphalt Enhanced with Polymer

Accession Number:

01594642

Record Type:

Component

Abstract:

Devulcanizaiton of crumb rubber in asphalt matrix was proved to have a negative effect on mechanical properties during the production of Terminal Blend (TB) rubberized asphalt, while the addition of SBS can significantly restore the lost properties through revulcanization reaction. However, the revulcanization reaction was not clear from molecular components to rheological properties. This study investigated the chemical and rheological perspectives of the revulcanization reaction of TB rubberized asphalt enhanced with styrene-butadiene-styrene (SBS) polymer. Gel permeation chromatography (GPC) and fluorescence microscopy were used to characterize the change of molecular weight and morphology during the revulcanization reaction. In addition, Attenuated Total Reflection (ATR) Fourier Transform Infrared (FT-IR) Spectroscopy was performed to characterize the revulcanization behaviors and aging behaviors of TB rubberized asphalt enhanced with polymer. Moreover, dynamic shear rheometer (DSR) was used to conduct dynamic oscillatory test and multiple stress creep recovery (MSCR) test. The test results indicate that the addition of SBS can promote the revulcanization of TB rubberized asphalt while the further addition of polyphosphoric acid (PPA) might 20 have a negative effect. The revulcanization results in increased molecular weight and greatly improves the high temperature performance and elastic properties. Meanwhile, TB rubberized asphalt enhanced with polymer offers great low temperature performance compared to that of commonly used SBS modified asphalt. Furthermore, TB rubberized asphalt offers better anti-aging properties over SBS modified asphalt since the formation of carbonyl compound and sulfoxide is inhibited during the aging process.

Supplemental Notes:

This paper was sponsored by TRB committee AFK20 Standing Committee on Characteristics of Asphalt Materials.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-5155

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Huang, Weidong
Lin, Peng
Tang, Naipeng
Zheng, Mao

Pagination:

17p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-5155

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 6:14PM