An overview on Tests and Specification Limits of Aggregates to Create an Appropriate Skid Resistance in Asphalt Pavement

Document Type : Original Article

Authors
Ahamd Mansourian 1
Mohammd Mehdi Khabiri 2
Shahin Shabani 3
1 Associate Professor, Road, Housing and Urban Development Research Center (BHRC), Tehran, Iran
2 Associate Professor, Civil Engineering Faculty, Yazd University, Yazd, Iran
3 Associate Professor, Faculty of Civil Engineering, Payam Noor University (PNU), Tehran, Iran.
10.22034/road.2024.453387.2277
Abstract
Appropriate skid resistance is one of the important requirements in road paving; because this factor plays a decisive role in the safety of vehicle traffic, especially in rainy conditions. The fine texture of the asphalt surface, which primarily depends on the characteristics of the aggregates used in the asphalt mixture, plays a fundamental role in creating friction and skid resistance between the pavement and the vehicle tire; Therefore, it is necessary to ensure the proper quality of the aggregates before preparing the asphalt mixture. Because institutions and researchers have proposed various tests for this purpose, in the present study, while introducing each of these tests, the specifications limits for the parameters obtained from each of the tests have also been presented. The investigations show that no single test can indicate the optimal performance of the aggregate in the required skid resistance in the asphalt pavement; Meanwhile, a specific limit cannot be introduced for the output of these experiments. The suggested limits or values obtained from research and experiences can be considered as a primary guide in determining the test criteria related to the performance of aggregates in creating an appropriate skid resistance in asphalt pavement.
Keywords
Skid Resistance
Pavement
Asphalt
Aggregate
Specification Limits
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