Investigating the Relation among British Pendulum Number, Mean Texture Depth and Asphalt Content in Hot Mix Asphalt
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_CIVLJ-8-1_007
تاریخ نمایه سازی: 23 شهریور 1403
Abstract:
Pavement surface texture and its skid resistance are two key safety parameters of highways, which both are influenced by pavement characteristics. In the present study, a newly constructed asphalt pavement (Qom-Garmsar freeway) in Iran is examined. The goal is to inspect the relation between skid resistance and pavement texture in order to asphalt content changes in Hot Mix Asphalt. Mean Texture Depth (MTD) and British Pendulum Number (BPN) are being applied to quantify pavement texture and skid resistance, respectively. The results show that the asphalt content has a significant effect on MTD and consequently, BPN in loaded pavements, as well as non-loaded pavements. The result revealed that the lowest BPN value obtained, when the asphalt content is about the optimum value. Moreover, it is demonstrated that using asphalt contents less and more than the optimum value, results in BPN improvement. Asphalt content increasing, around optimum value, leads to MTD decrease. The results also reveal that by increasing the MTD, the BPN decreases to ۷۵ (in MTD value of ۰.۶۲ mm) and then increases.
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Authors
Mohammad Hossain Jalal Kamali
Tarbiat Modares University
Abolfazl Hassani
Professor, Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
Javad Sodagari
Zamin Payeh Consulting Engineering
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