Quantitative Measurement of Crack Sealing Benefit using 3D Laser Technology and 3-Year Crack Growth Measurement in the Field

Crack sealing is one of the most used asphalt pavement preservation methods. However, quantitative measurement of the long-term crack sealing benefit based on the crack length growth retardation is still limited due to the lack of an accurate and effective crack length measurement method in the field. This is the first study that proposes using a 3D laser technology that measures crack length growth to quantitatively measure the crack sealing benefit by comparing the crack length growth between crack sealed and non-sealed sections of pavement. Also, this study analyzes the long-term field actual crack sealing benefit in different pretreatment pavement conditions and under the different roadway environmental factors to study adequate treatment timing. The field study included nine test sites located in Georgia (six in Hawkinsville, southern GA; three in Covington, central GA) with different pretreatment pavement conditions (pavement rating 66-98 ) and different roadway environmental factors (pavement thickness 2.5-10 inches; traffic volume 1,030-12,900; truck 3%-26%) was conducted over 3 years (Dec. 2017-Sep. 2020). The experimental results show crack sealing can effectively retard crack growth by 40-128%. Results show crack sealing benefit is higher when applying crack sealing at a higher pavement condition rating. This finding suggests that transportation agencies can apply crack sealing to prolong the life of healthier conditioned pavement rather than prolong the life of the poor conditioned pavement. These results are very valuable for transportation agencies to determine the right crack sealing timing and treatment criteria.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 21p

Subject/Index Terms

Filing Info

  • Accession Number: 01763809
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02053
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:12AM