01763809

Component

https://doi.org/10.1177/03611981211027897

Crack sealing is one of the most commonly used methods to preserve asphalt pavements. However, quantification of crack sealing benefits (or the long-term delaying effects of crack sealing on crack propagation) remains unavailable because field crack lengths could not be measured accurately and efficiently. In this study, 3D laser technology is proposed to measure and compare the growth of crack lengths between sealed and non-sealed pavement sections and, for the first time, to accurately and efficiently quantify the crack sealing benefits. To validate the proposed method and find adequate treatment timing (or conditions), nine field sites in Georgia, U.S., with different pavement pre-treatment conditions and roadway environmental factors were monitored over 3?years from December 2016 to September 2019. The study results showed that crack sealing can retard crack growth by 40%–128%, and such delaying effects are more significant under better pavement pre-treatment conditions. The findings suggest that transportation agencies can prolong the service life of pavements by applying crack sealing before the pavement condition becomes poor. In addition, this work has been proved to be very valuable for transportation agencies to determine the best timing and treatment criteria for crack sealing.

Zhongyu Yang https://orcid.org/0000-0002-7535-0924 © National Academy of Sciences: Transportation Research Board 2021.

TRBAM-21-02053

English

0000-0002-7535-0924

0000-0003-3114-5387

0000-0002-6650-2279

0000-0002-7789-2479

pp 103-116

2021-12

Transportation Research Record: Journal of the Transportation Research Board

Web

Figures; References (44) ; Tables

Asphalt; Cracking; Lasers; Measurement; Pavement performance; Sealing (Technology)

Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 23 2020 11:12AM