Interface adhesion enhancement and multi-scale evaluation of recycled concrete aggregate(RCA) and asphalt

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

Construction and Building Materials Pub Date : 2024-11-29 DOI:10.1016/j.conbuildmat.2024.139271

Yueqin Hou , Xuejun Zhang , Jie Liu , Chengchen He , Xiaoping Ji

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引用次数: 0

Abstract

Interfacial enhancement is an important way to ensure the road performance of RCA-containing asphalt mixtures. In this paper, RCA was enhanced by four methods, namely acid solution immersion(ASI), volcanic ash slurry immersion(VASI), Nano-SiO₂/cement material composite modification(NM) and lime water immersion(LWI), and the enhancement effect was evaluated using four indicators, namely, three-dimensional surface roughness on the RCA surface, surface energy parameter, adhesion work between RCA and asphalt, and predicted macroscopic bond strength between RCA and asphalt. The results showed that both ASI and LWI resulted in an increase in the 3D surface roughness of RCA, which was reduced after VASI and NM; the surface energy parameters of RCA and the adhesion work with asphalt were effectively increased after LWI, NM, and VASI. The predicted macroscopic adhesion strength of RCA after hydrochloric acid immersion(HAI) and LWI was increased by 1.55 %, 17.81 % and 17.81 %, respectively. The predicted macroscopic adhesion strength of RCA to asphalt decreased by 0.04 %, 10.85 %, and 18.67 % after phosphoric acid solution immersion(PAI), VASI, and NM, respectively; considering the four types of reinforcement, LWI and ASI were the more economical and effective reinforcement methods.

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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.