根据 4 毫米 DSR 测量结果探索沥青中的物理硬化

IF 3.4 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2024-07-16 DOI:10.1617/s11527-024-02427-6
Haopeng Zhang, Hilde Soenen, Georgios Pipintakos, Johan Blom, Ali Zain U. I. Abadeen, Yanjun Qiu, Wim Van den Bergh
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引用次数: 0

摘要

物理硬化(PH)是影响沥青低温性能的一个重要因素。目前,大多数 PH 表征都是通过弯曲梁流变仪进行的。为了提出一种基于动态剪切流变仪(DSR)设备的替代方法,本文探讨了用 4 毫米平板测试研究沥青 PH 值的可能性。本文选择了多种粘结剂,它们的天然蜡含量、原油来源和生产程序各不相同。其中还包括一个老化样本。结果表明,20 分钟的平衡期足以稳定样品温度。为了评估 PH 值,选择了 4 小时的后续时间,因为 4 小时后复合模量随时间变化的斜率降至 1%以下。进一步的结论表明,沥青的物理硬化指数(PHI)与温度和频率有关。PHI 在 0 °C 时最大,在较低频率下测试时会增加。无蜡粘结剂几乎没有硬化,而有蜡粘结剂则有明显的硬化。虽然蜡的存在是一个重要因素,但这些粘结剂的 PHI 与总蜡含量(通过差示扫描量热法确定)并无直接关系。总之,研究结果表明,4 毫米 DSR 试验是表征沥青 PH 值的有效方法。
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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Exploring physical hardening in bitumen based on 4 mm DSR measurements

Physical hardening (PH) is an important factor affecting the low-temperature performance of bitumen. At present, most PH characterizations are performed by the bending beam rheometer. To present an alternative method based on the Dynamic Shear Rheometer (DSR) equipment, this paper explores the possibilities of the 4 mm plate-plate test to investigate PH in bitumen. A variety of binders was selected, differing in their content of natural waxes, in crude origin, and production procedure. An aged sample was also included. The results show that a 20 min equilibrium period is sufficient to stabilize the sample temperature. To evaluate the PH, a time follow-up of 4 h was selected, as after 4 h the change in slope of complex modulus versus time drops below 1%. Further conclusions show that the physical hardening index (PHI) of bitumen is temperature- and frequency-dependent. This PHI is largest at 0 °C and increases when tested at lower frequencies. The non-waxy binder had almost no hardening, while the waxy binders showed evident hardening. Although the presence of wax is an important factor, the PHI of these binders is not directly related to the total wax content, which was determined by differential scanning calorimetry. In conclusion, the findings show that 4 mm DSR tests provide an effective approach to characterize PH of bitumen.

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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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