|Table of Contents|

Evaluation of road performance and skid resistance of ultra-thin wear layer using calcined bauxite aggregate(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年4期
Page:
10-19
Research Field:
道路工程
Publishing date:

Info

Title:
Evaluation of road performance and skid resistance of ultra-thin wear layer using calcined bauxite aggregate
Author(s):
GUAN Bo-wen1; 2; 3;  XUE Xing-jie1; 2; 3;  MENG Jian-dang4;  QIN Hao4;  SHENG Yan-ping1; 2; 3; XIE Chao1; 2; 3;  CHEN Yan-jun4
(1. Engineering Research Center of Ministry of Education for Transportation Materials, Chang'an University,Xi'an 710064, Shaanxi, China; 2. Xi'an Key Laboratory of Modern Transportation Functional Materials, Chang'an University, Xi'an 710064, Shaanxi, China; 3. School of Materials Science and Engineering,Chang'an University, Xi'an 710064, Shaanxi, China; 4. Henan Transportation Development Group Co., Ltd. Puyang branch, Puyang 457000, Henan, China)
Keywords:
road engineering;  ultra-thin wear layer;  calcined bauxite;  road performance;  skid resistance
PACS:
U416.217
DOI:
10.19721/j.cnki.1671-8879.2022.04.002
Abstract:
In order to investigate the road performance and skid resistance of ultra-thin wear layer using calcined bauxite aggregate, 88# calcined bauxite, 75# calcined bauxite and basalt were selected to prepare SMA-5 asphalt mixture. High and low temperature performance and water stability of SMA-5 asphalt mixture were evaluated by the rutting test, low temperature bending test, water immersion Marshall test, and freeze-thaw splitting test. In addition, the long-term anti-skid attenuation law of ultra-thin wear layer of calcined bauxite was investigated through three-wheel polishing test, dynamic friction coefficient test and average section depth test. The results show that calcined bauxite has higher porosity than the basalt. Moreover, the asphalt mixture with calcined bauxite use more asphalt than traditional asphalt mixtures. The asphalt mixture containing 88# calcined bauxite has excellent high temperature stability, which is about 1.2 times that of a basalt asphalt mixture. The low temperature crack resistance and water resistance are slightly better than asphalt mixture with basalt. 88# calcined bauxite can maintain a higher dynamic friction coefficient after 50 000 times of long-term wear at high and low speeds, which indicates that 88# calcined bauxite has the best ability to maintain a higher surface friction coefficient and abrasion resistance at low and high speeds. 88# calcined bauxite can not only ensure a good skid resistance of the ultra-thin wear layer, but also can make the long-term polished section maintain a high skid resistance.9 tabs, 6 figs, 32 refs.

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Last Update: 2022-07-20