Synthesis of different antioxidant intercalated layered double hydroxides and their enhancement on aging resistance of SBS modified asphalt mixture

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

Construction and Building Materials Pub Date : 2024-11-15 DOI:10.1016/j.conbuildmat.2024.139229

Yinqiao Xu , Quantao Liu , Huan Wang , Shaopeng Wu

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引用次数: 0

Abstract

The aging of asphalt mixtures shortens the lifespan of asphalt pavements. Incorporating antioxidant intercalated layered double hydroxides (OLDHs) into asphalt is a viable approach to enhance the resistance of the asphalt binder to aging. However, OLDHs hasn’t been optimized and its effectiveness in asphalt mixture is not clear. This study is to synthetize different OLDHs and examine their enhancements on the anti-aging performance of SBS modified asphalt mixture (SMAM). For this purpose, ion-exchange method was employed to intercalate antioxidant 1222, antioxidant 1010, and 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid into the interlayers of Mg/Al-LDHs to prepare different OLDHs (designated as 1010-LDHs, 1222-LDHs, and 3B-LDHs, respectively). The synthesized OLDHs were characterized by crystal phase, chemical structure, micro-morphology, UV–visible spectroscopy and free radical scavenging tests. The three prepared OLDHs were then added to the SBS modified asphalt (SBSMA) and mixtures were prepared with both OLDHs-containing and non-OLDHs-containing asphalts. Aging tests were conducted, and the changes in pavement performance of different mixtures before and after aging were compared to assess the effects of OLDHs on the anti-aging properties of SMAM. Finally, asphalt binders were extracted from different aged mixtures and subjected to relevant tests. The results indicate that all three antioxidants were successfully intercalated into the LDHs while maintaining the layered structure. Additionally, the incorporation of the three OLDHs improved the ultraviolet and thermal-oxidative aging (TO aging) resistances of the SMAM. Among the three, 3B-LDHs demonstrated the best anti-aging enhancement at the same dosage. These findings offer a reference for studying and applying OLDHs to enhance the anti-aging properties of SMAM.

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不同抗氧化剂插层双氢氧化物的合成及其对 SBS 改性沥青混合料抗老化性能的影响

沥青混合料的老化会缩短沥青路面的使用寿命。在沥青中加入抗氧化剂夹层双氢氧化物（OLDHs）是增强沥青胶结料抗老化能力的一种可行方法。然而，OLDHs 尚未得到优化，其在沥青混合料中的效果也不明确。本研究旨在合成不同的 OLDHs，并考察它们对 SBS 改性沥青混合料（SMAM）抗老化性能的增强作用。为此，采用离子交换法将抗氧化剂 1222、抗氧化剂 1010 和 3-（3，5-二叔丁基-4-羟基苯基）丙酸插层到 Mg/Al-LDHs 夹层中，制备出不同的 OLDHs（分别称为 1010-LDHs、1222-LDHs 和 3B-LDHs）。对合成的 OLDHs 进行了晶相、化学结构、微观形态、紫外可见光谱和自由基清除测试。然后将制备的三种 OLDHs 添加到 SBS 改性沥青（SBSMA）中，并制备了含 OLDHs 和不含 OLDHs 的沥青混合料。进行老化试验，比较不同混合料老化前后路面性能的变化，以评估 OLDHs 对 SMAM 抗老化性能的影响。最后，从不同的老化混合物中提取沥青粘结剂并进行相关测试。结果表明，三种抗氧化剂都成功地插层到了 LDHs 中，同时保持了分层结构。此外，三种 OLDH 的加入还提高了 SMAM 的抗紫外线和热氧化老化（TO 老化）性能。在三种OLDHs中，3B-LDHs在相同剂量下的抗老化效果最好。这些发现为研究和应用 OLDHs 提高 SMAM 的抗老化性能提供了参考。

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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.