作者：陆幸¹, 陈太福², 陈宗碧³, 刘文昶⁴, 林宏伟⁴

作者单位：1. 宁波市轨道交通集团有限公司，浙江 宁波 315000;
2. 广州市高速公路有限公司，广东 广州 511466;
3. 文山州公路工程质量监督站，云南 文山 663000;
4. 同济大学交通运输工程学院，上海 201804

关键词：透水路面;透水沥青混合料;三轴试验;级配优化;高温性能

摘要：

为改善透水沥青混合料的高温抗剪切性能，对透水混合料PAC-16三轴剪切试验进行模拟，构建虚拟三轴剪切试验数值模型，并对其模拟准确性进行验证。基于此，结合数值仿真和室内试验对PAC-16级配进行优化。结果表明：虚拟试验方法所测的不同围压水平峰值应力、内摩擦角及黏聚力均与室内试验实测结果的误差不超过5%，且试验规律与实际相符；推荐粗集料最佳用量为4.75~9.5 mm: 9.5~13.2 mm: 13.2~16 mm: 16~19 mm= 10: 15: 12: 3、细集料最佳级配取i= 0.75对应的级配、粗细集料用量比为80: 20，并确定0.075 mm，4.75 mm及16 mm关键筛孔通过率，提出PAC-16优化级配。优化级配的高温性能至少提升10%，整体路用性能更加出色。

Optimization gradation of permeable asphalt mixture PAC-16
LU Xing¹, CHEN Taifu², CHEN Zongbi³, LIU Wenchang⁴, LIN Hongwei⁴
1. Ningbo Rail Transit Group Co., Ltd., Ningbo 315000, China;
2. Guangzhou Expressway Co., Ltd.，Guangzhou 511466, China;
3. Wenshan Prefecture Highway Engineering Quality Supervision Station, Wenshan 663000, China;
4. School of Transportation Engineering, Tongji University, Shanghai 201804, China
Abstract: In order to improve the high-temperature performance of the permeable asphalt mixture, this study simulated three-axis shear test of PAC-16 mixes, built a numeric model of the virtual shear test, and verify its simulation accuracy. Based on this, the mineral gradation of PAC-16 was optimized in combination with simulation and interior trials. Results showed that the peak stress, internal friction angle and adhesion of different enclosure levels measured by the virtual test method were not more than 5% of the error of the actual test results, and the test rules are in line with the actuality. The recommended optimal dosage of coarse aggregate of 4.75-9.5 mm: 9.5-13.2 mm: 13.2-16 mm: 16-19 mm is 10:15:12:3, the optimal grading of fine aggregate was taken as the gradation corresponding to i=0.75, and the ratio of coarse aggregates to fine aggregates was 80:20. The key sieve pass rates of 0.075 mm, 4.75 mm, and 16 mm are determined and the optimized gradation of PAC-16 was proposed. It has been shown that the high-temperature performance of the optimized gradation was improved by at least 10%, and the overall road performances were even better.
Keywords: permeable pavement;permeable asphalt mixture;triaxial test;gradation optimization;high temperature performance
2024, 50(4):60-67  收稿日期: 2023-05-06;收到修改稿日期: 2023-09-06
基金项目: 宁波市公益类科技计划（2019C50019）；云南省交通运输厅科技创新示范项目(云交科教[2019]14号)
作者简介: 陆幸(1986-),男,浙江宁波市人,高级工程师,硕士,研究方向为交通运输工程。
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