期刊论文

Study on Preparation of Organic Montmorillonite by Freeze-drying Method and Its Modified Asphalt Performance

Zhang, Jian(JZhang4343@126.com)

中文

材料导报

1005-023X

2020

34

2

04037-04042

10.11896/cldb.19010060

湖南省自然科学基金（2017JJ2263）~~；

本校为第一且通讯机构

采用冷冻干燥法制备了有机化蒙脱土(OMMT),利用X射线衍射(XRD)仪和扫描电子显微镜(SEM)研究了冷冻干燥对OMMT层间距和表面形态的影响;使用OMMT制备了改性沥青,研究了它对改性沥青物理和高低温流变性能以及抗老化性能的影响。结果表明,冷冻干燥能够进一步扩大OMMT的层间距并细化OMMT颗粒的尺寸;OMMT的引入增加了改性沥青的软化点和车辙因子,显著提高了改性沥青的高温性能。对OMMT改性沥青进行薄膜烘箱老化(TFOT)和压力容器老化(PAV),分别模拟沥青的短期(ST)和长期(LT)老化。与原始沥青相比,OMMT改性沥青TFOT后的车辙因子和软化点变化较小,PAV后的蠕变刚度和疲劳因子较低,改性沥青的老化指数明显低...

In this paper, organic montmorillonite (OMMT) was prepared by freeze-drying method. The effects of freeze-drying on the spacing and surface morphology of OMMT layer were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The modified asphalt was prepared by OMMT, and its influence on the physical and high-temperature rheological properties and anti-aging properties of the modified asphalt was studied. The results showed that freeze-drying could further increase the interlayer spacing of OMMT and refine the OMMT particle ...