高温-雨水耦合作用下排水沥青混合料抗水破坏性能试验研究
1. 江西宜春市政交通建设有限公司, 江西宜春 336000
2. 江西省宜春市公路事业发展中心, 江西宜春 336000
3. 长沙理工大学, 交通运输工程学院, 湖南长沙 410114
| 摘 要： | 随着绿色道路的发展，排水沥青路面在中国逐步出现和广泛应用。为探讨排水沥青混合料在高温雨水耦合条件下的抗水破坏性能衰减程度，本文采用了汉堡车辙试验，对排水沥青混合料试件在温度60°C和50°C的干燥、饱水和浸水条件组合为工况1（50°C，干燥），工况2（50°C，饱水），工况3（50°C，浸水），工况4（60°C，干燥），工况5（60°C，饱水），工况6（60°C，浸水）等6种环境工况进行试验，通过测量车辙深度值、计算车辙变形率、蠕变速率和剥落变形拐点值等指标，评估了排水沥青混合料在不同环境工况下的抗水破坏性能。试验结果表明，在高温-雨水耦合条件下，排水沥青混合料的车辙深度值、车辙变形率、蠕变速率和剥落变形拐点值等指标均有不同程度的下降，说明高温和雨水的耦合作用会大幅度降低排水沥青混合料的抗水破坏性能。60°C干燥、饱水、浸水条件下的最大车辙深度值分别是同50°C干燥、饱水、浸水条件下车辙深度的比值为1.95、2.54、2.60倍；50°C干燥，50°C饱水、50°C浸水、60°C干燥、60°C饱水、60°C浸水条件车辙深度比值为1:1.2:2.2:1.9:3.1:5.8；车辙变形率比为1:1.2:2.2:1.9:3.1:7.2；蠕变速率为2.4:2.2:1.2:1.3:1.1:1；剥落变形拐点值比值为2.5:2.25:1.25:1.75:1.25:1。本研究表明高温和雨水的耦合作用对排水沥青混合料的抗水破坏性能有显著影响。本文的研究成果已经通过汉堡车辙试验验证，为绿色道路的发展和应用提供了理论依据和技术支持。 |
| 关 键 词： | 路面工程; 抗水破坏; 排水沥青混合料; 高温-雨水环境; 汉堡车辙试验 |
| DOI： | 10.57237/j.mater.2023.05.001 |
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收稿日期: 2023-08-17
接受日期: 2023-09-14
在线出版日期: 2023-09-19
Experimental Study on Water Damage Resistance of Permeable Asphalt Mixture Under Coupling Action of High Temperature and Rainwater
1. Jiangxi Yichun Municipal Transportation Construction Co., Ltd., Yichun 336000, China
2. Highway Development Center of Yichun City, Yichun 336000, China
3. School of Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
| Abstract: | Permeable asphalt road surfaces have gained prominence in China's green road initiatives, finding widespread application. To investigate the extent of water-induced deterioration of permeable asphalt mixtures under high-temperature rainfall coupled conditions, this study employed Hamburg Wheel Tracking (HWT) tests. Six environmental conditions were established, encompassing dry, saturated, and submerged states at temperatures of 50°C and 60°C, denoted as Conditions 1 (50°C, dry), 2 (50°C, saturated), 3 (50°C, submerged), 4 (60°C, dry), 5 (60°C, saturated), and 6 (60°C, submerged). Various performance indicators, including rut depth, rut deformation rate, creep rate, and stripping inflection point, were measured to evaluate the water damage resistance of permeable asphalt mixtures under different environmental conditions. The results revealed a significant decrease in all assessed indicators under high-temperature rainfall coupled conditions, suggesting a substantial reduction in water damage resistance. Notably, under dry, saturated, and submerged conditions at 60°C, the maximum rut depths were 1.95, 2.54, and 2.60 times those observed at 50°C, respectively. The rut depths exhibited a ratio of 1:1.2:2.2:1.9:3.1:5.8 for the conditions of 50°C dry, 50°C saturated, 50°C submerged, 60°C dry, 60°C saturated, and 60°C submerged. The rut deformation rate ratios followed a pattern of 1:1.2:2.2:1.9:3.1:7.2, while the creep rate ratios were 2.4:2.2:1.2:1.3:1.1:1, and the stripping inflection point ratios were 2.5:2.25:1.25:1.75:1.25:1 for the same conditions. This study underscores the significant influence of high-temperature rainfall coupling on the water damage resistance of permeable asphalt mixtures. The research outcomes, validated through Hamburg Wheel Tracking tests, provide theoretical foundations and technical support for the development and application of green road systems. |
| Keywords: | Road Engineering; Water Damage Resistance; Permeable Asphalt Mixture; High Temperature Rainwater Environment; Hamburg Rutting Test |
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