Axial compression mechanical properties of steel-fiber-reinforced alkali slag concrete columns strengthened using carbon fiber-reinforced polymers at high temperatures

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

Construction and Building Materials Pub Date : 2025-04-09 DOI:10.1016/j.conbuildmat.2025.141164

Liang Yin , Yunhe Li , Pang Chen , Hao Cheng , Long Gao

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引用次数: 0

Abstract

Alkali-activated slag cementitious material (AASCM) is a promising innovation in sustainable building materials, characterized by a low carbon footprint and the effective utilization of solid waste resources. Despite its potential, its reinforcement performance at high temperatures is not sufficiently researched. In this study, the axial compression mechanical properties of 135 steel-fiber-reinforced alkali slag columns, strengthened with carbon fiber-reinforced polymer (CFRP) at high temperatures, are experimentally analyzed. The study explores the influence of steel fiber content, CFRP layers, and high-temperature grade on the failure modes, axial compressive strength, peak compressive strain, and axial compressive constitutive behavior of AASCM specimens. Furthermore, scanning electron microscopy analysis is employed to examine the microstructural effects on the axial compression mechanical properties of the specimens. A stress–strain model of CFRP-confined AASCM is established after subjecting the specimens to high temperatures considering the significant characteristics of thermal damage in AASCMs. The study findings provide a theoretical basis for the extended application of AASCM in high-temperature environments.

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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.