In this paper, four antiskidding surface test sections were paved to investigate the long-term skid resistance of the improved dense-graded asphalt concrete in Guangdong Province (GAC) using diabase fine aggregate instead of limestone. Four test sections were tested by the accelerated loading equipment (MLS11, mobile load simulator). The reduction law of the long-term skid resistance of GAC-16 was analyzed based on the accelerated pavement testing results. Prediction models of the GAC-16 skid resistance were also established and verified. The evaluation indexes of the long-term skid resistance of the asphalt pavement were introduced, and the antiskidding durability of different sections was evaluated. Results show that the initial British pendulum number (BPN) and mean texture depth (MTD) of the asphalt pavement cannot completely characterize its long-term skid resistance. With increasing loading cycles, the attenuation law of the BPN and MTD of GAC-16 denotes a fast reduction during the early stage, which gradually stabilizes. The relation between the skid resistance index and accelerated loading cycles was analyzed by nonlinear fitting according to the least-squares-method principle. The attenuation law of the BPN and MTD of GAC-16 with loading cycles was in accordance with the exponential and logarithmic models, respectively. The long-term antiskidding performance of the asphalt pavement could be accurately characterized using a stable BPN, loading cycles while reaching a stable BPN, the initial MTD value, and the MTD reduction rate as the evaluation indexes of the skid resistance of asphalt pavement. Compared with limestone fine aggregate, diabase fine aggregate can improve the long-term skid resistance of the asphalt mixtures.

中文翻译：

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基于加速路面测试的GAC-16长期防滑性能评估

本文铺设了四个防滑表面测试部分，以研究使用辉绿岩细粉骨料代替石灰石的广东省改良致密级沥青混凝土的长期防滑性。四个测试部分通过加速加载设备（MLS11，移动负载模拟器）进行了测试。根据加速路面试验结果分析了GAC-16长期防滑性能的下降规律。还建立并验证了GAC-16防滑性能的预测模型。介绍了沥青路面长期抗滑性的评价指标，并对不同断面的抗滑性进行了评价。结果表明，沥青路面的初始英国摆数（BPN）和平均质地深度（MTD）不能完全表征其长期抗滑性。随着加载周期的增加，GAC-16的BPN和MTD的衰减规律表示在早期阶段快速降低，并逐渐趋于稳定。根据最小二乘法原理，通过非线性拟合分析了防滑阻力指数与加速加载周期之间的关系。GAC-16的BPN和MTD随载荷循环的衰减规律分别符合指数模型和对数模型。沥青路面的长期防滑性能可以通过使用稳定的BPN，加载周期，同时达到稳定的BPN，初始MTD值，以MTD降低率作为评价沥青路面防滑性能的指标。与石灰石细骨料相比，辉绿岩细骨料可以改善沥青混合料的长期防滑性。