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Title:

Adhesive Properties of Asphalts and Aggregates in Tropical Climates

Accession Number:

01589006

Record Type:

Component

Abstract:

At the Central and South American regions pavement deterioration due to moisture is high. The deterioration is directly related to the adhesive compatibility between the asphalt and aggregates, as well as the cohesiveness of the asphalt matrix. The affinity between the materials affects how well the bond will behave in the presence of water, and therefore the susceptibility of the asphalt mixture to moisture in the long term. It is well accepted that traditional tests for assessing moisture damage are not necessarily representative of high moisture conditions, such as Colombia and Costa Rica. Therefore, it is imperative that methods to quantify the actual moisture susceptibility of hot-mix asphalt (HMA) be implemented and adopted in local specifications. In order to characterize the true adhesion properties of regional materials, physical analysis has been implemented to measure surface free energies (SFE) of aggregates and asphalts commonly used locally, as well as the interfacial energy between the materials and their change in the presence of water. Consequently, analysis of different asphalt-aggregate combinations, typically used in Costa Rica and Colombia, were evaluated by means of the Asphalt Bond Strength (ABS) test in order to mechanically determine the adhesive and cohesive strength of the materials. The effect of antistrip additives was also evaluated. The ABS test results were then related to wettability and SFE measurements for all materials which allowed to determine work of adhesion, cohesion, and debonding of asphalt from aggregate surface in the presence of water. The SFE showed high correlation to ABS results.

Supplemental Notes:

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

Monograph Accession #:

01584066

Report/Paper Numbers:

16-2026

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Aguiar-Moya, José P
Reyes-Lizcano, Fredy
Baldi-Sevilla, Alejandra
Salazar-Delgado, Jorge
Pacheco-Fallas, Juan F
Cely-Leal, Nestor
Loria-Salazar, Luis

Pagination:

14p

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

Geographic Terms:

Colombia; Costa Rica

Subject Areas:

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-2026

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 4:53PM