沥青混合料抗剪性能试验仪开发

为了有利于设计与施工部门进行混合料抗剪性能评价,开发了简易型抗剪仪,并成型不同混合料,分别采用抗剪仪与M TS进行混合料的抗剪试验。通过试验对比发现,在不同混合料和不同试验方案组合下,两种试验方法的抗剪强度结果具有较好的相关性。本文也指出,M TS试验结果均比抗剪仪结果要大,而且在混合料抗剪强度较大时,M TS试验结果比抗剪仪大的较多。本文从设备加载频率与温度控制方面进行了原因分析。最后,认为该抗剪仪可以用于设计与施工监控阶段混合料抗剪强度的快速评价。

Development of Testing Device for Asphalt Mixture Shearing Properties Evaluation

A simple shearing test device is developped for asphalt mixture shearing properties evaluation in design and construction department. The shearing properties of different mixtures are tested by MTS system and the simple shearing test device.It is revealed that the test results of different test methods are in good correlation with the variations of mixtures and test schemes.It is also pointed out that the test results of MTS are higher than that of the simple test device,furhter more,the results of MTS are more higher than that of the latter when the shearing strength of mixture is relatively large.The reasons are analyzed for the differences of the loading frequency and temperature between the two devices.Finally,the simple shearing test device is recommended for fleet evaluation of asphalt mixture shearing properties during mixture design and constructions