集料指标波动对高模量沥青混合料路用性能的影响研究

Study on Effect of Aggregate Index Fluctuation on Pavement Performance of High-modulus Asphalt Mixture

摘要:

为了分析集料指标波动对高模量沥青混合料（HMM-13）路用性能的影响规律，分别制备了10%、15%、18%三种针片状含量，10.5%、12.5%、15%、18%四种粉尘含量（占0~3 mm料比例）与55%、60%、70%三种砂当量的HMM-13沥青混合料，测试其高、低温性能及水稳定性能。试验结果显示：针片状含量的增加会导致HMM-13混合料的水稳定性能衰减1.60%，高温性能衰减30.47%，低温性能衰减6.59%；粉尘含量的增加会导致HMM-13混合料的水稳定性能增加3.20%，高温性能增加20.19%，低温性能衰减4.96%；砂当量的降低会导致HMM-13混合料的水稳定性能增加1.80%，高温性能增加12.23%，低温性能衰减5.98%。

Abstract:

In order to analyze the influence of aggregate index fluctuations on the pavement performance of high-modulus asphalt mixture (HMM-13), HMM-13 asphalt mixtures with three needle flake contents of 10%, 15% and 18%, four dust contents of 10.5%, 12.5%, 15% and 18% (accounting for 0~3 mm material proportion), and three sand equivalents of 55%, 60% and 70% are prepared respectively to test the high-temperature, low-temperature and water stability performances. The experimental results show that the increase of needle flake content will lead to a 1.60% decrease of water stability performance of HMM-13, its high-temperature performance decreases by 30.47% and its low-temperature performance decreases by 6.59%. The increase of dust content will lead to a 3.20% increase of water stability performance, a 20.19% increase of high-temperature performance and a 4.96% decrease of low-temperature performance of HMM-13 mixture. The decrease of sand equivalent will lead to a 1.80% increase of water stability performance, a 12.23% increase of high-temperature performance and a 5.98% decrease of low-temperature performance of HMM-13 mixture.