Characterization and performance evaluation of asphalt mastics modified with recycled concrete powder

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

Construction and Building Materials Pub Date : 2025-03-31 DOI:10.1016/j.conbuildmat.2025.141039

Huixia Li , Yan Liang , Yanke Yang , Yunjie Xia , Xiangbing Xie , Zhengtao He

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引用次数: 0

Abstract

This study investigated the feasibility of using recycled concrete powder (RCP) as an alternative to limestone powder (LP) in asphalt mastic fillers, addressing construction waste management challenges while promoting sustainable development of asphalt pavements. Through multidimensional research incorporating microscopic characterization, performance evaluation, and mechanism analysis, the study systematically examined the effects of RCP on asphalt mastic properties. Results showed that RCP exhibited rough surface texture and high specific surface area, while its elevated MgO content enhanced the asphalt-filler interfacial interaction. The incorporation of RCP improved the high-temperature stability and deformation resistance of asphalt mastic, although performance declined when the replacement ratio exceeded 75 %. Rheological tests and fatigue analysis revealed that RCP50 and RCP75 blends demonstrated optimal comprehensive performance. Grey relational analysis identified correlations between filler characteristics and mastic properties, showing that J_nr(diff) values were significantly associated with MgO content and RCP dosage. Multi-criteria evaluation based on the entropy method suggested an optimal RCP replacement ratio of 50–75 %. This study provides new insights and theoretical foundation for the utilization of construction waste and enhancement of asphalt pavement performance.

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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.