Improving pavement friction through aggregate blending

M. Al Assi, E. Kassem, Reginald Kogbara, E. A. Masad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Maintaining adequate level of skid resistance on highways is essential for the safety of motorists. Among other factors, skid resistance of asphalt pavements depends on aggregate shape characteristics and its resistance to abrasion and polishing. This study investigated the effect of aggregate blending on improving the frictional characteristics of asphalt pavements. Test slabs prepared using different blends of limestone and gabbro were subjected to accelerated polishing. Gabbro is known to have better resistance to abrasion and polishing compared to limestone. A dynamic friction tester was used to measure the coefficient of friction at different polishing cycles; in addition, the macrotexture was measured using a sand patch test. The results showed that blending gabbro with limestone would improve the frictional characteristics of asphalt mixtures compared to the control mix prepared with only limestone. Based on the findings of this study, a blend of 50% gabbro and 50% limestone would provide comparable skid resistance and cut down the amount of gabbro imported for road construction leading to cost savings and maximizing the use of natural resources in Qatar. Meanwhile, the researchers recommend constructing trial test sites and monitoring their frictional characteristics alongside evaluating the mechanical properties of the proposed blend to ensure durability.

Original languageEnglish
Title of host publicationAdvances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018
EditorsEyad Masad, Ilaria Menapace, Amit Bhasin, Tom Scarpas, Anupam Kumar
PublisherCRC Press/Balkema
Pages277-280
Number of pages4
ISBN (Print)9781138313095
Publication statusPublished - 1 Jan 2018
EventInternational Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018 - Doha, Qatar
Duration: 16 Apr 201818 Apr 2018

Publication series

NameAdvances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018

Conference

ConferenceInternational Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018
CountryQatar
CityDoha
Period16/4/1818/4/18

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ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Al Assi, M., Kassem, E., Kogbara, R., & Masad, E. A. (2018). Improving pavement friction through aggregate blending. In E. Masad, I. Menapace, A. Bhasin, T. Scarpas, & A. Kumar (Eds.), Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018 (pp. 277-280). (Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018). CRC Press/Balkema.