Preparation and Dynamic Mechanical Properties of High-Modulus Asphalt Modified by Waste Rubber

被引：0

作者：

Xin X. ^{[1
]}

Su L. ^{[1
]}

Liang M. ^{[1
]}

Yao Z. ^{[1
]}

Fan W. ^{[2
]}

Nan G. ^{[2
]}

Zhang J. ^{[1
]}

机构：

[1] School of Qilu Transportation, Shandong University, Jinan

[2] State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao

来源：

Cailiao Daobao/Materials Reports | 2020年 / 34卷 / 18期

基金：

中国国家自然科学基金;

关键词：

De-oiled asphalt; Dynamic mechanical properties; High-modulus asphalt; Microstructure; Rubber modification;

D O I：

10.11896/cldb.19090054

中图分类号：

学科分类号：

摘要：

With de-oiled asphalt (DOA) as the main raw material, waste rubber powder of different particle size and contents was added respectively to prepare high-modulus asphalt. Conventional properties analysis, dynamic mechanical analysis and fluorescence microscopy were performed for the products. Results show that rubber powder is not completely compatible with the asphalt but dispersed in the asphalt in the form of dispersed phase existing in the asphalt in the form of strip or rod. With the increase of rubber amounts, softening point increases gradually and the high-temperature performance is obviously improved. It is caused by the swelling of waste rubber powder after absorbing the light part of asphalt and the increase of asphaltene content. At the same temperature, G*, G' and G" all showed an obvious upward trend with the increase of waste rubber content, indicating more obvious of improvement effect and more favorable rutting resistance of high-modulus asphalt with the higher the waste rubber powder content. By fitting the relationship between G*/sinδ and temperature under different waste rubber amount, the high tempe-rature grade of high-modulus asphalt increases by 1.66℃ for every 1wt% increase of waste rubber. © 2020, Materials Review Magazine. All right reserved.

引用

页码：18060 / 18064

页数：4

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