Sustainable Asphalt Mixtures Reinforced with Basic Oxygen Furnace Steel Slag: Multi-Scale Analysis of Enhanced Interfacial Bonding

IF 6.5 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Case Studies in Construction Materials Pub Date : 2025-01-02 DOI:10.1016/j.cscm.2024.e04198

Bin Lei , Linjie Yu , Jiawu Chen , Yuan Meng , Dong Lu , Ning Li , Fulin Qu

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引用次数: 0

Abstract

Utilizing Basic Oxygen Furnace Slag (BOFS) to enhance the pavement performance of the asphalt mixtures is a promising strengthening strategy. However, the academic literature still needs to explore the interfacial dynamics and underlying mechanisms. This study introduces fractal dimension analysis to quantify the Interfacial Transition Zone (ITZ) characteristics in asphalt mixtures incorporating BOFS. A multi-scale analysis of the ITZ performance was conducted on three types of asphalt mixtures: Full Proportion Steel Slag Asphalt Mixture (100SSA-AM), Full Proportion Basalt Asphalt Mixture (100NCA-AM), and Asphalt Mixture of Coarse Aggregate Steel Slag and Fine Aggregate Basalt (Hybrid-AM). The results indicate that compared to the conventional 100NCA-AM, the splitting tensile strength and cracking index of 100SSA-AM and Hybrid-AM increased by 22.2 %, 28.1 %, and 13.5 %, 7.1 %, respectively. The total porosity of 100SSA-AM and Hybrid-AM increased by 58.4 % and 47.2 %, respectively, while the fractal dimension of the pores slightly decreased. In addition, compared to 100NCA-AM and 100SSA-AM, the ITZ fractal dimension of Hybrid-AM increased by 7.03 % and 3.79 %, respectively. In terms of interfacial nanomechanics, the ITZ indentation modulus of 100SSA-AM increased by 14.6 %, and the ITZ width increased by 43.5 % compared to 100NCA-AM, whereas for Hybrid-AM, the ITZ indentation modulus increased by 43.5 % and the ITZ width decreased by 26.1 %. Moreover, the study further revealed that the width and nanomechanical properties of the ITZ are closely associated with the surface roughness and chemical affinity of the aggregates, which holds significant implications for the design and application of sustainable pavement materials.

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碱性氧炉钢渣增强可持续沥青混合料：增强界面结合的多尺度分析

利用碱性氧炉渣（BOFS）提高沥青混合料的路用性能是一种很有前途的加固策略。然而，目前的学术文献仍需要对界面动力学及其潜在机制进行深入的探讨。本文采用分形维数分析方法对含BOFS沥青混合料的界面过渡区特征进行了定量分析。对全比例钢渣沥青混合料（100SSA-AM）、全比例玄武岩沥青混合料（100NCA-AM）和粗骨料钢渣-细骨料玄武岩沥青混合料（Hybrid-AM）三种沥青混合料的ITZ性能进行了多尺度分析。结果表明：与常规的100NCA-AM相比，100SSA-AM和Hybrid-AM的劈裂抗拉强度和开裂指数分别提高了22.2% %、28.1 %和13.5 %、7.1 %；100SSA-AM和Hybrid-AM的总孔隙度分别增加了58.4% %和47.2% %，孔隙分形维数略有下降。此外，与100NCA-AM和100SSA-AM相比，Hybrid-AM的ITZ分形维数分别提高了7.03 %和3.79 %。在界面纳米力学方面，与100NCA-AM相比，100SSA-AM的ITZ压痕模量增加了14.6 %，ITZ宽度增加了43.5 %，而Hybrid-AM的ITZ压痕模量增加了43.5 %，ITZ宽度减少了26.1 %。此外，研究进一步揭示了ITZ的宽度和纳米力学性能与集料的表面粗糙度和化学亲和力密切相关，这对可持续路面材料的设计和应用具有重要意义。

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

Case Studies in Construction Materials Multiple-

CiteScore

7.60

自引率

19.40%

发文量

842

审稿时长

63 days

期刊介绍： Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.