Multi-scale investigation on water stability and anti-aging performance of granite asphalt mixture modified with composite anti-stripping agents

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-09 DOI:10.1016/j.conbuildmat.2024.139031

Hancheng Dan , Xu Liu , Jiaqi Chen

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引用次数: 0

Abstract

This study aims to improve the water damage resistance of granite asphalt mixtures. Five types of composite modified asphalt were developed using organic anti-stripping agents AMRIII, LQ-2020, ultrafine hydrated lime (HL), and SBS modified asphalt, and the effects of aging on the mechanical properties of these modified asphalt mixtures were evaluated. Fourier Transform Infrared Spectroscopy (FTIR), pull-off tests, and indirect tensile strength tests were the primary analytical methods used. The results indicated that the anti-stripping agents physically mixed with the SBS modified asphalt without any chemical reaction. The SBS modified asphalt containing anti-stripping agents exhibited better mechanical strength compared to unmodified SBS asphalt, with the combined use of multiple anti-stripping agents proving more effective than individual applications. At five freeze-thaw conditions without aging, the enhancement ratios of indirect tensile strength test results of single addition of AMRIII, LQ-2020, HL and combined addition of AMRIII/HL and LQ-2020/HL were 27.27 %, 36.36 %, 14.29 %, 50.91 % and 46.41 %, respectively. The addition of the anti-stripping agent enhanced the cohesive and adhesive energy. Aging reduced the water stability of the mixtures. Different modified asphalts have various sensitivity to aging, with the combination of AMRIII and HL showing the best aging resistance performance. Additionally, it was found that surface free energy had a strong correlation with water damage indicators, suggesting its potential for verifying the water stability of asphalt mixtures.

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复合抗剥落剂改性花岗岩沥青混合料水稳定性和抗老化性能的多尺度研究

本研究旨在提高花岗岩沥青混合料的抗水损害性能。使用有机抗剥落剂 AMRIII、LQ-2020、超细熟石灰（HL）和 SBS 改性沥青开发了五种复合改性沥青，并评估了老化对这些改性沥青混合料力学性能的影响。使用的主要分析方法包括傅立叶变换红外光谱法（FTIR）、拉拔试验和间接拉伸强度试验。结果表明，抗剥落剂与 SBS 改性沥青进行了物理混合，没有发生任何化学反应。与未改性的 SBS 沥青相比，含有抗剥落剂的 SBS 改性沥青具有更好的机械强度，多种抗剥落剂的联合使用比单独使用更有效。在不老化的五种冻融条件下，单一添加 AMRIII、LQ-2020、HL 以及联合添加 AMRIII/HL 和 LQ-2020/HL 的间接抗拉强度测试结果的增强率分别为 27.27 %、36.36 %、14.29 %、50.91 % 和 46.41 %。抗剥离剂的添加增强了内聚力和粘合力。老化降低了混合物的水稳定性。不同的改性沥青对老化有不同的敏感性，AMRIII 和 HL 的组合表现出最佳的抗老化性能。此外，研究还发现表面自由能与水破坏指标有很强的相关性，这表明表面自由能具有验证沥青混合料水稳定性的潜力。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.