Study on improvement of early skid resistance of SMA asphalt pavement based on spreading grit

Authors

JIANG Zhaowei, 1. Shandong Institute of Transportation Science, Jinan, Shandong 250031, China; 2. Key Laboratory of Highway Maintenance Technology and Transportation Industry (Jinan), Jinan, Shandong 250031, China;Follow
WEI Jincheng, 1. Shandong Institute of Transportation Science, Jinan, Shandong 250031, China; 2. Key Laboratory of Highway Maintenance Technology and Transportation Industry (Jinan), Jinan, Shandong 250031, China;
LIU Hang, 3. Shandong Hi-Speed Company Limited, Jinan, Shandong 250014, China
SUN Qiang, 1. Shandong Institute of Transportation Science, Jinan, Shandong 250031, China; 2. Key Laboratory of Highway Maintenance Technology and Transportation Industry (Jinan), Jinan, Shandong 250031, China;
LI Xia, 1. Shandong Institute of Transportation Science, Jinan, Shandong 250031, China; 2. Key Laboratory of Highway Maintenance Technology and Transportation Industry (Jinan), Jinan, Shandong 250031, China;

Abstract

The early skid resistance of SMA 13 pavement is poor. To address this issue, the existing research results were analyzed, and physical detection was conducted. It was found that the large structure pavement failed to provide good early skid resistance detection value. Based on the principle of spreading abrasive materials, two methods to improve the early skid resistance of SMA pavement were proposed. The particle size of abrasive material was determined to be 2.36–4.75 mm, and the spreading amount was 0.82 kg/m2, which verified the safety of the methods. The test results show that the two methods can slightly improve the skid resistance coefficient of the swing type, and the improvement rate of method 2 is higher. After the implementation of method 1, the dynamic friction coefficient and lateral force coefficient are increased by 10% and 13.2%, but the lateral force coefficient still cannot meet the requirements. In method 2, the dynamic friction coefficient and lateral force coefficient are increased by 73.2% and 77.8%. Both methods reduce the depth of the structure, but it remains above 0.8 mm. It is considered that a larger depth of the structure is unsatisfactory, and an upper limit should be set to ensure the initial skid resistance. The effects of the two methods on the long-term skid resistance of the pavement need to be studied.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.008

First Page

56

Last Page

60

Submission Date

March 2025

Recommended Citation

Zhaowei, JIANG; Jincheng, WEI; Hang, LIU; Qiang, SUN; and Xia, LI (2023) "Study on improvement of early skid resistance of SMA asphalt pavement based on spreading grit," Journal of China & Foreign Highway: Vol. 43: Iss. 3, Article 8.
DOI: 10.14048/j.issn.1671-2579.2023.03.008
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss3/8

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