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Title:

Bending Characteristics for Asphalt Concrete Beams with Bond Interface

Accession Number:

01518444

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The shear characteristics of bond interface in asphalt concrete (AC) has been widely studied along with the effects of bonding conditions on pavement mechanical responses. However, no study has been focused on the bending characteristics for asphalt concrete with bond interface between layers. This paper investigates the bending characteristics for AC beams with bond interface using a three-point bonded beam bending test. For comparison, bending test for integrated beam without bonding interface is also conducted. Bending strain test and bending fatigue test are performed for bonded specimen using a medium setting modified asphalt emulsion tack coat. Bending strain resistance and bending fatigue life are measured. The influence of tack coat application rate, temperature, and loading level on AC layer bending characteristics are investigated. The results show that an optimum application rate of tack coat is desired. At optimal rate, the integrity and bending properties of AC layers are enhanced. However, it is found that different test methods and different testing temperatures can result in different optimum application rate. Finally, a fatigue regression model for bonded hot mix asphalt (HMA) layers is developed based on three factors including application rate, testing temperature, and loading level.

Supplemental Notes:

This paper was sponsored by TRB committee AFK40 Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-4420

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Ai, Changfa
Qiu, Yanjun
Li, Joshua Q
Wang, Kelvin C P
Yang, Enhui

Pagination:

18p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Uncontrolled Terms:

Bending beam tests

Subject Areas:

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-4420

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 3:32PM