TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Optimization of Fatigue Cracking Resistance of Costa Rican Asphalt Concrete Mixes

Accession Number:

01044192

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Fatigue cracking is a common distress in Costa Rican asphalt concrete, and yet current specifications on materials and structural design do not address it. This report presents numbers of repetitions to failure of several experimental treatments, tested by the flexural beam test. Each treatment is the result of a combination of a representative aggregate source (one from the Eastern shore and two from the Central Region) as well as mix type (either dense graded with AC30 binder, dense graded with SBS modified AC30, stone matrix asphalt with AC30 or stone matrix asphalt with PG 70 – XX), and controlled strain (400, 500, 600 x 10-6 mm / mm). Test strain levels were determined based on a multi-layer elastic analysis of several typical pavement sections, so that representative strains under actual loading were selected. After mixing, short term oven aging, compaction, long term oven aging, and sample cutting, a flexural beam test at 20°C was performed on all 72 specimens; so that 36 experimental treatments were considered, each tested twice (two replicates). As a result of all available results, an analysis of variance was performed, so that not only was it found that aggregate source, type of mixture and strain had significant effects on number of repetitions to failure, but also their interactions (cross products) were found highly significant. Additionally, linear regression analysis techniques were employed to select fatigue cracking transfer functions. Consequently, separate models were obtained to convert strain and mix properties to number of repetitions to failure of both dense graded and stone matrix asphalt mixes.

Monograph Accession #:

01042056

Report/Paper Numbers:

07-1828

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Castro-Fernandez, Pedro Luis
Sebaaly, Peter E

Pagination:

29p

Publication Date:

2007

Conference:

Transportation Research Board 86th Annual Meeting

Location: Washington DC, United States
Date: 2007-1-21 to 2007-1-25
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (4) ; References (7) ; Tables (10)

Uncontrolled Terms:

Flexural beam fatigue; Multilayered

Geographic Terms:

Costa Rica

Subject Areas:

Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2007 Paper #07-1828

Files:

TRIS, TRB

Created Date:

Feb 8 2007 6:32PM