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Title:

Chemical and Rheology Evaluation on the Field Short-term Aging of High Content Polymer Modified Asphalt

Accession Number:

01698452

Record Type:

Component

Abstract:

High Content Polymer Modified Asphalt (HCPMA) is gaining popularities due to its superior performance, but its aging behavior has not yet been well understood. As a result of the high viscosity of HCPMA, high mixing and planting temperatures are required during the construction, which could easily lead to serious short-term aging. To assess HCPMA’s actual field short-term aging level, binders used in three actual field projects were recovered and tested using Fourier Transform Infrared (FTIR) and Dynamic shear rheology (DSR). Binders recovered from the Short-term Oven Aging (STOA) aged mix were assessed as well to provide extra references. Different mix gradations, aging temperatures and transport time were investigated. In addition, the correlations between infrared functional indices and rheology parameters were studied. It is found that the aging of HCPMA contains the oxidation of asphalt and the degradation of styrene butadiene styrene (SBS) polymer. Polymer degradation exerts more influence on the viscoelastic response rather than the modulus. After aging, HCPMA becomes more stiff and viscous. There is a strong correlation between infrared functional indices and viscoelastic measurements (R3.2 and phase angle). On the other hand, no clear correlation with modulus is observed. The aging effects of standard Rolling Thin Film Oven Test (RTFOT) are too weak to simulate the field aging of HCPMA and the actual field aging level lies between RTFOT and STOA.

Supplemental Notes:

This paper was sponsored by TRB committee AFK20 Standing Committee on Asphalt Binders.

Report/Paper Numbers:

19-00486

Language:

English

Corporate Authors:

Transportation Research Board

Authors:

Huang, Weidong
Yan, Chuanqi
Jiang, Xuan

Pagination:

22p

Publication Date:

2019

Conference:

Transportation Research Board 98th Annual Meeting

Location: Washington DC, United States
Date: 2019-1-13 to 2019-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2019 Paper #19-00486

Files:

TRIS, TRB, ATRI

Created Date:

Dec 7 2018 9:24AM