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无机微粉填料及纤维改性沥青技术日渐成熟,但鲜见煤矸石粉/水镁石矿物纤维复合改性沥青胶浆的研究成果。通过布氏粘度试验、动态剪切流变试验(DSR)、动态热力学分析试验(DMTA)等对石灰岩矿粉、H-200、H-1250、H-4000型煤矸石粉4种填料与水镁石纤维复合改性沥青胶浆的高低温性能进行研究;运用灰熵法分析了煤矸石粉的各项技术指标对沥青胶浆高低温性能的影响显著性;借助扫描电镜(SEM)、红外光谱试验仪(IR)对其作用机理进行分析。研究结果表明,煤矸石粉复合水镁石纤维能显著改善沥青胶浆的高温抗车辙性能,而对其低温性能有一定程度的削弱;填料的平均粒径和比表面积是影响沥青胶浆车辙因子和玻璃化转变温度的两个重要因素。为固体废弃物煤矸石与水镁石矿物纤维在沥青路面工程中的资源化利用提供依据。
Inorganic micro-filler and fiber-modified asphalt technology matures, but the rare coal gangue powder / brucite mineral fiber composite modified asphalt mortar research results. The effects of limestone ore powder, H-200, H-1250 and H-4000 coal gangue powder on the water magnesium content were studied by Brookfield viscometry, dynamic shear rheology test and dynamic thermodynamic analysis test. Stone fiber composite modified asphalt mortar high and low temperature properties were studied; the use of gray entropy method analysis of coal gangue powder technical indicators of high and low temperature performance of asphalt mortar significant effect; by scanning electron microscopy (SEM), infrared spectroscopy Tester (IR) to analyze its mechanism of action. The results show that the gangue powder composite brucite fiber can significantly improve the high temperature rutting resistance of asphalt mortar, while its low temperature performance to a certain extent weakened; the average particle size and specific surface area of the filler is affected asphalt rutting factor And glass transition temperature of two important factors. It provides a basis for the resource utilization of solid waste gangue and brucite mineral fiber in asphalt pavement engineering.