Temperature dependence of the cohesive strength of asphalt binder in low- and medium-temperature zone and its mechanism

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2024-12-04 DOI:10.1617/s11527-024-02539-z

Zhenfeng Song, Chuanfeng Zheng, Jing Zhao, Hanjun Li, Weidong Jin, Fuyv Wang, Chuanhao Lin, Haisong Luo

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Abstract

This study studied the changes in the bond strength of asphalt binders in medium and low temperature areas, focusing on the temperature-dependent mechanism that affects the bond strength of asphalt. The quantitative testing technology independently developed by the team was used to accurately measure the bond strength of three representative asphalt types (Type I, Type II, and Type III), and their change curves in the temperature range of 25 to − 35 °C were plotted. The experimental results show that within this temperature range, the bond strength of the three asphalts all showed significant peaks, and there were significant differences in the temperature and change rate when they appeared. These differences are mainly related to the differences in the asphalt component ratio and brittle temperature. The study also revealed the key influence of the asphalt brittle temperature on its low-temperature performance. The results show that by adjusting the asphalt composition to reduce the brittle temperature, its low-temperature bonding performance can be significantly improved. This study provides a theoretical basis for the selection of asphalt binders in road construction in cold areas, and proposes the importance of using brittle temperature as a screening indicator.

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低、中温区沥青粘结剂黏结强度的温度依赖性及其机理

本研究研究了沥青粘结剂在中低温区域粘结强度的变化，重点研究了影响沥青粘结强度的温度依赖机制。利用团队自主研发的定量测试技术，对三种具有代表性的沥青类型（ⅰ型、ⅱ型和ⅲ型）的粘结强度进行了精确测量，绘制了其在25 ~−35℃温度范围内的变化曲线。实验结果表明，在该温度范围内，三种沥青的粘结强度均出现显著峰值，且出现时的温度和变化率存在显著差异。这些差异主要与沥青组分比和脆性温度的差异有关。研究还揭示了沥青脆性温度对其低温性能的关键影响。结果表明，通过调整沥青成分降低脆性温度，可显著提高其低温粘结性能。本研究为寒冷地区道路施工中沥青粘结剂的选择提供了理论依据，并提出了脆性温度作为筛选指标的重要性。

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来源期刊

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.