GTM沥青混合料低温性能影响因素研究  

Studies on Factors Affecting GTM-designed Asphalt Mixture Performance at Low Temperature

作　　者：魏如喜[1] 

机构地区：[1]天津市市政工程研究院,天津300074

出　　处：《中国市政工程》2008年第1期78-80,共3页China Municipal Engineering

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.

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 

分 类 号：U414.75[交通运输工程—道路与铁道工程]