The impact of ageing on the bitumen stiffness modulus using the CAM model

IF 0.6 4区 工程技术 Q4 ENGINEERING, CIVIL Baltic Journal of Road and Bridge Engineering Pub Date : 2018-03-27 DOI:10.3846/BJRBE.2018.386
M. Cholewińska, M. Iwański, G. Mazurek
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引用次数: 18

Abstract

This article presents the results of the viscoelastic properties of the polymer-modified bitumen produced in Warm Mix Asphalt technology. A Fischer-Tropsch synthetic wax and a liquid surface-active agent (fatty amine) were used as bitumen viscosity-reducing modifiers. All tested parameters were determined after short-term and long-term ageing. The complex modulus G* and phase angle δ were measured with a cone-plate rheometer. All dynamic tests were performed at 60 °C within the frequency range from 0.005 Hz to 10 Hz. On the basis of the rheological index R determined using the Christensen−Anderson−Marasteanu (CAM) model, it was found that the fatty amine additive slowed down the age-hardening process in the bitumen. In contrast, the synthetic wax increased the stiffness of the bitumen at all levels tested, regardless of the type of ageing simulation process.
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老化对沥青刚度模量的影响
本文介绍了温拌沥青技术生产的聚合物改性沥青的粘弹性性能的研究结果。采用费托合成蜡和液体表面活性剂(脂肪胺)作为沥青降粘改性剂。所有测试参数均经过短期和长期老化后确定。用锥板流变仪测量了复合模量G*和相位角δ。所有动态试验均在60°C下进行,频率范围为0.005 Hz至10 Hz。根据Christensen - Anderson - Marasteanu (CAM)模型测定的流变指数R,发现脂肪胺添加剂减缓了沥青的时效硬化过程。相比之下,无论老化模拟过程的类型如何,合成蜡在所有测试级别上都增加了沥青的刚度。
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
Baltic Journal of Road and Bridge Engineering
Baltic Journal of Road and Bridge Engineering 工程技术-工程:土木
CiteScore
2.10
自引率
9.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: THE JOURNAL IS DESIGNED FOR PUBLISHING PAPERS CONCERNING THE FOLLOWING AREAS OF RESEARCH: road and bridge research and design, road construction materials and technologies, bridge construction materials and technologies, road and bridge repair, road and bridge maintenance, traffic safety, road and bridge information technologies, environmental issues, road climatology, low-volume roads, normative documentation, quality management and assurance, road infrastructure and its assessment, asset management, road and bridge construction financing, specialist pre-service and in-service training;
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