采用弯曲应变能评价沥青混合料的低温性能

通过对掺加不同添加剂的同一种沥青混合料分别作低温弯曲破坏试验和约束试件温度应力试验，通过弯曲破坏试验的应力应变曲线求算应变能，并以弯曲应变能作为评价沥青低温性能的标准，同时以约束试件温度应力试验的结果验证评价结果的合理性。结果表明：采用弯曲应变能作为评价指标可以很好表征材料的低温性能，并且与约束试件温度应力试验的结果基本吻合。

Useing curvature strain energy to evaluate asphalt mixture's low temperature performance

This paper analyses asphalt mixture mixed of different additives respectively by low temperature curvature rupture test and thermal stress restrained specimen test.It calculates strain en- ergy by the stress-strain curves of curvature rupture test,and then uses curvature strain energy as an evaluation of the low-temperature performance of asphalt standards,at the same time evaluates the reasonableness of the evaluation results by the results of thermal stress restrained specimen test.It is found curvature strain energy as an evaluation can be good indicators of low temperature performance characterization of materials whose result is almost the same with result of thermal stress restrained specimen test.