摘要
论述了以GTM设计的AC-16C改性沥青混合料为基础,在级配、油石比、粉油比变化的条件下,分别对混合料进行低温弯曲破坏试验。试验结果表明,对于沥青混合料的低温抗裂性能,4.75mm通过率、油石比、粉油比均存在最佳值。采用BBR试验进一步分析消石灰及水泥对胶泥低温性质的影响时发现,以部分水泥替代矿粉有利于提高沥青胶泥的低温性能。研究结论对道路沥青混合料配合比设计和施工控制具有一定的参考价值。
Described here is the cold bending rupture test on the AC-16C modified asphalt mixture designed using the GTM method with varied gradation, bitumen-aggregate ratio and cement-bitumen ratio. The result shows that best values can be found in 4.75 mm through rate, bitumen-aggregate ratio and cement-bitumen ratio for the cold crack-resistant property of the asphalt mixture. In BBR test, further analysis of the impact of the lime hydrate and cement on cold property of the mortar shows that partial replacement of the mineral powder with cement can improve the cold property of the asphalt mortar. The result will be as a reference for mixing ratio design of asphalt mixture and construction control.
出处
《中国市政工程》
2008年第1期78-80,共3页
China Municipal Engineering
关键词
GTM设计方法
低温开裂性能
低温弯曲破坏试验
BBR试验
油石比
粉油比
GTM design method
cold cracking property
cold bending rupture test
BBR test
bitumen-aggregate ratio
cement-bitumen ratio
