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为把握特立尼达湖沥青改性机理,对分离出的灰分进行了微观性质测试、技术指标分析和与沥青相互作用研究,并和2种路用矿粉进行对比。初选3种灰分分离技术,通过分离效果和操作可行性的对比,建议使用离心机分离灰分的方法;通过微观颗粒形态和晶体组成测试,发现灰分颗粒粒径小、表面构造粗糙,其主要材料组成为石英和黏土;技术指标研究上发现灰分具有较大的密度、更细的粒度以及庞大的比表面积;测试了灰分与2种矿粉制备胶浆的G*/sinδ,显示灰分的增劲效果强于矿粉,且当粉胶比大于1.2时明显增大,增幅远超过普通矿粉。故灰分凭借粒度小、表面积大且粗糙等特征,能增强沥青高温性能。
In order to grasp the mechanism of Trinidad Lake asphalt modification, the separated ash was tested for microscopic nature, technical index analysis and interaction with asphalt, and compared with 2 kinds of road mineral powder. Primary separation of three kinds of ash technology, through the separation effect and feasibility of the operation proposed the use of centrifuge separation ash method; microscopic particle morphology and crystal composition test found that ash particle size is small, the surface roughness of the structure, the main material Composed of quartz and clay; technical indicators of the study found that the ash has a greater density, finer particle size and large specific surface area; tested ash and two kinds of mineral powder prepared G * / sinδ glue, showing the strength of ash The effect is stronger than the mineral powder, and when the powder-plastic ratio is greater than 1.2 significantly increased, an increase far more than ordinary mineral powder. Therefore, gray with small particle size, large surface area and coarse features, can enhance the high temperature performance of asphalt.