Characterization of Styrene-Butadiene-Styrene (SBS)-Modified Asphalt Binders using the Bending Beam Rheometer and the Asphalt Binder Cracking Device

IF 1.1 4区工程技术 Q3 ENGINEERING, CIVIL

Canadian Journal of Civil Engineering Pub Date : 2023-03-30 DOI:10.1139/cjce-2022-0319

Mike Aurilio, Pejoohan Tavassoti, Michael D. Elwardany, H. Baaj

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引用次数: 0

Abstract

The addition of Styrene Butadiene Styrene to asphalt binders has led to enhanced performance in pavements across the entire range of working temperatures but have proven to be more difficult to characterize than unmodified binders. Low-temperature properties of asphalt binders are typically evaluated using the Bending Beam Rheometer (BBR) which was developed to measure the creep stiffness. Recent refinements to the BBR analysis have led to the development of ΔTc which is meant to provide insight into the relaxation properties of the binder. The Asphalt Binder Cracking Device (ABCD) was developed to improve on this characterization by taking into consideration the failure strength and coefficient of thermal contraction. It was found that the evaluation of the materials using ΔTc was inconsistent with binder type and generally indicated that SBS reduced cracking resistance while the ABCD critical temperature and the proposed ΔTf parameter generally showed an improved correlation with SBS concentration.

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用弯曲梁流变仪和沥青粘结剂裂解装置表征苯乙烯-丁二烯-苯乙烯(SBS)改性沥青粘结剂

在沥青粘合剂中添加苯乙烯-丁二烯-苯乙烯，可以在整个工作温度范围内提高路面性能，但已被证明比未改性的粘合剂更难表征。沥青粘结剂的低温性能通常是用弯曲梁流变仪(BBR)来评估的，这是为了测量沥青的蠕变刚度而开发的。最近对BBR分析的改进导致了ΔTc的发展，这意味着提供了对粘合剂松弛特性的深入了解。通过考虑破坏强度和热收缩系数，研制了沥青粘结剂开裂装置(ABCD)。研究发现，ΔTc对材料的评价与粘结剂类型不一致，普遍表明SBS降低了材料的抗裂性，而ABCD临界温度和提出的ΔTf参数与SBS浓度的相关性普遍有所提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Canadian Journal of Civil Engineering 工程技术-工程：土木

CiteScore

3.00

自引率

7.10%

发文量

105

审稿时长

14 months

期刊介绍： The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.