Value-added recycling of plant waste for modification of asphalt pavement used aggregates: Interface enhancement and carbon sequestration

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-01-23 DOI:10.1016/j.cej.2025.159822

Dan Zhao, Jiwang Jiang, Xingyu Gu, Jianqiao Liu, Jingling Wang, Guangyi Yang

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Abstract

The durability of asphalt pavements depends heavily on the interaction between the aggregate and asphalt. Despite its significance, there are few clear and environmentally friendly methods for directly managing this interface. In this study, a value-added wood waste recycling method is introduced that creates a porous carbon structure (Pc-S) on the aggregate surface. This modification process uses thermal cross-linking technology, in which biochar is converted at high temperatures into carbon on the aggregate surface in an activation reaction. Chemical bonds, specifically C Abstract Image

O, C

O, and Si

C, effectively anchor the Pc-S layers to the aggregate. As the asphalt solidifies, mechanical interlocking occurs at the interface, significantly increasing its strength. This carbon modification of granite not only fortifies the interface but also enhances its water intrusion resistance by over 78.9 %, outperforming basalt, which is one of the best aggregates for pavement construction. Moreover, using these modified aggregates in road construction can lead to negative carbon emissions, estimated at 349.23 tCO₂/km. This study is applicable to large-scale road infrastructure construction and provides a new solution for creating long-life green pavements.

Abstract Image

查看原文本刊更多论文

植物废料的增值回收用于沥青路面用骨料改性：界面增强和固碳

沥青路面的耐久性在很大程度上取决于集料与沥青之间的相互作用。尽管它很重要，但很少有明确和环保的方法来直接管理这个接口。在本研究中，介绍了一种增值木材废料回收方法，该方法在骨料表面产生多孔碳结构（Pc-S）。这种改性过程使用热交联技术，其中生物炭在高温下通过活化反应在聚集体表面转化为碳。化学键，特别是CO、CO和SiC，有效地将Pc-S层固定在聚集体上。随着沥青固化，界面处发生机械联锁，强度显著提高。碳改性花岗岩不仅强化了界面，而且抗水侵入性提高了78.9% %以上，优于玄武岩，是路面施工的最佳集料之一。此外，在道路建设中使用这些改性骨料可导致负碳排放，估计为349.23 tCO2/km。本研究适用于大规模道路基础设施建设，为创建长寿命绿色路面提供了新的解决方案。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.