Composite asphalt binder modification with waste Non-tire automotive rubber and pyrolytic oil

被引:17
作者
Kumar, Ankush [1 ]
Choudhary, Rajan [1 ]
Kumar, Abhinay [1 ]
机构
[1] IIT Guwahati, Dept Civil Engn, Gauhati, Assam, India
关键词
Composite asphalt modification; Pyrolytic oil; EPDM rubber; Asphalt; Waste tire; pre-treatment; BIO-ASPHALT; RHEOLOGICAL PROPERTIES; CRUMB RUBBER; PERFORMANCE; PRODUCTS;
D O I
10.1016/j.matpr.2021.07.431
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ethylene-propylene-diene monomer (EPDM) rubber is a synthetic rubber having a share of about onehalf of the total consumption of non-tire automotive rubber parts such as weather strips, window seals, hoses, etc. Pyrolysis is gaining attention as a thermochemical route for the effective and sustainable treatment of end-of-life tires. Tire pyrolytic oil (TPO) is one of the principal products generated from the pyrolysis of scrap tires. This study evaluated the use of TPO and EPDM waste rubber in composite asphalt binder modification through rheological characterization. In addition, the study also compared two processes (with and without pre-treatment/premixing of TPO and EPDM) for the preparation of the composite modified asphalt binders. The high temperature rheological characterization of binders was executed by the Superpave rutting criterion, failure temperatures, and multiple stress creep and recovery (MSCR) test. Frequency sweeps were conducted at multiple temperatures to study the changes in complex modulus and phase angle master curves. Also, the frequency sweep data was employed for analyzing the viscoelastic behavior of binders through storage and loss moduli crossover response. Furthermore, rheological tests including Superpave fatigue parameter, linear amplitude sweep (LAS), and binder yield energy test (BYET) were conducted at intermediate temperatures on the long-term aged binders. The observed results suggested an improvement in the asphalt binder performance with the composite modification in comparison to the single modification with EPDM and TPO alone. Pre-mixing of TPO and EPDM before adding to asphalt binder proved to be a better approach for preparing composite modified binder with EPDM rubber and TPO, and yielded better high- and intermediate-temperature performance. (c) 2021 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the F-EIR Conference 2021 on Environment Concerns and its Remediation: Materials Science.
引用
收藏
页码:158 / 166
页数:9
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