伊朗岩沥青/玄武岩纤维掺量对改性沥青的影响与性能试验

Effect and performance test of iranian rock asphalt/basalt fiber content on modified asphalt

通过动态剪切流变试验和弯曲梁流变试验研究了伊朗岩沥青掺量和玄武岩纤维掺量对BF/IRA复合改性沥青性能的影响,并通过车辙试验、低温小梁弯曲试验、浸水马歇尔试验等一系列试验研究了BF/IRA复合改性沥青混合料的路用性能。结果表明,岩沥青和玄武岩纤维可提高沥青高温性能,而岩沥青不利于改性沥青低温性能,玄武岩纤维可改善其低温性能,且岩沥青建议掺量为8%,玄武岩纤维掺量宜为5%。玄武岩纤维可显著提高岩沥青改性沥青高低温性能、水稳定性。

The effects of Iranian rock asphalt content and basalt fiber content on the performance of BF/IRA composite modified asphalt were studied through dynamic shear rheological test and bending beam rheological test.The road performance of BF/IRA composite modified asphalt mixture was studied by a series of experiments such as rutting test,low temperature trabecular bending test andimmersion Marshall test.The test results showed that rock asphalt and basalt fiber improved the high-temperature performance of asphalt,while rock asphalt was not conducive to the low-temperature performance of modified asphalt.Basalt fiber can improve its low-temperature performance,and the recommended content of rock asphalt and basalt fiber should be 8%and 5%.Basalt fiber can significantly improve the high and low temperature performance and water stability of rock asphalt modified asphalt.