用于沥青改性的纳米材料综合比选

本文首先通过一定的选择原则在尽可能大的范围内初步确定用于改性沥青的纳米材料种类，然后通过内掺法及内掺后超声波分散两种手段制备纳米改性沥青，并通过比较不同种类纳米改性沥青的针入度、软化点、延度三大指标及布氏粘度指标，最终确定A为基质沥青最理想的纳米材料改性荆。采用硅烷偶联剂KH550、聚乙烯亚胺PEI和表面活性剂硬脂酸三种分散剂对A进行表面改性，并制备相应的改性沥青。通过改性沥青的三大指标及粘度指标，对三种分散剂的表面改性效果进行比较，并最终确定相对纳米材料2％剂量的硅烷偶联剂KH550为A最佳分散剂。

Comprehensive Comparison of Nano-materials for Asphalt Modification

Firstly,the types of nano-materials for asphalt modification were initially identified within the scope as large as possible by certain principles,then prepared nano-modified asphalt by means of the internally mixed method and the ultrasonic dispersion after using the method.Finally the nano-material A was determined as the most appropriate nano-material modifier of asphalt by comparing penetration,softening point,ductility and the Brookfield viscosity of different types of the nano-modified asphalts.Surface of the nano-material A was modified by silance coupling agent KH550,polyethylene imine PEI and stearic acid.The corresponding modified asphalt was prepared.The effect of surface modification of the three dispersants were compared through the three indicators of modified asphalt and viscosity index.At last,2% silance coupling agent KH550 related to the amount of the nano-materials was determined as the most appropriate dispersant of the nano-material A.