01022740

Component

https://doi.org/10.3141/1933-13

http://scholar.google.com...gton&publication_year=2005

This paper describes the results of field and laboratory tests evaluating four configurations and three materials used for crack surfacing. Crack surfacing, as defined in this paper, is the sealing of cracks over 1 in. (25 mm) wide in asphalt pavements. Laboratory testing using the thermal stress restrained specimen test (TSRST; AASHTO TP 10-93) determines the temperature at which a specimen with its ends restrained fails due to thermal contraction. Field studies evaluate the performance of two materials with the uniform overband configuration on three roads in Wyoming. All crack surfacing materials are commercially available hot-poured thermoelastic bituminous products. Overband configurations are found to be the preferred method for applying crack surfacing, based on the TSRST. Failure modes are evaluated and generally found to propagate from the interface between the surfacing material and the pavement to which it is bonded. Field studies indicate that traffic and snowplowing have a significant influence on the performance of crack surfacing. Cracks sealed with the same configuration and the same material performed substantially better on US-26 than on I-25 over the same time periods. The only obvious difference between the two is that I-25 has three to four times as much traffic and correspondingly greater snow control efforts. This study concludes that materials, configurations, and traffic or snowplowing frequency influence the performance of crack surfacing.

01022726

English

pp 113-120

2005

Transportation Research Record: Journal of the Transportation Research Board

0309094070

Print

Figures; Photos; References (6) ; Tables (2)

Asphalt pavements; Bituminous materials; Field tests; Laboratory tests; Sealing compounds; Snow removal; Traffic loads

Failure modes; Hot-pour sealants; Thermal stress restrained specimen test

Wyoming

Freight Transportation; Highways; Maintenance and Preservation; Materials; I31: Bituminous Binders and Materials; I60: Maintenance

TRIS, TRB, ATRI

Apr 12 2006 2:36PM

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