Mechanical Properties and Constitutive Relation of Waste Fiber Geopolymer Recycled Aggregate Concrete

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-04-10 DOI:10.1007/s11837-025-07339-6

Xingyi Chen, Yichao Zhang, Li Sun, Haolin Yang, Chuang Li, Chao Wang

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引用次数: 0

Abstract

To address the negative environmental impact of industrial and construction solid waste accumulation, a novel waste fiber geopolymer recycled aggregate concrete (WFGRAC) has been produced employing recycled coarse aggregates, geopolymers, and waste fibers. The mechanical properties and working mechanism of WFGRAC have been comprehensively analyzed through a combination of mechanical performance tests and mesoscopic finite element simulations. A constitutive model for WFGRAC under uniaxial compression was also established. The results demonstrated that WFGRAC exhibited a 5.71% increase in compressive strength compared to ordinary recycled concrete. However, when the waste fiber content exceeded 5%, the mechanical properties of WFGRAC declined as the fiber content increased. The interfacial transition zone (ITZ) in recycled concrete is identified as a weak area where damage initiates during compression. The constitutive model for WFGRAC under uniaxial compression was established through strain statistical analysis and was proven to effectively reflect the observed stress-strain relationship.

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废纤维地聚合物再生骨料混凝土的力学性能及本构关系

为了解决工业和建筑固体废物积累对环境的负面影响，利用再生粗骨料、地聚合物和废纤维生产了一种新型的废纤维地聚合物再生骨料混凝土（WFGRAC）。通过力学性能试验和细观有限元模拟相结合的方法，对WFGRAC的力学性能和工作机理进行了综合分析。建立了单轴压缩下WFGRAC的本构模型。结果表明，与普通再生混凝土相比，WFGRAC的抗压强度提高了5.71%。然而，当废纤维含量超过5%时，WFGRAC的力学性能随纤维含量的增加而下降。界面过渡区（ITZ）在再生混凝土被确定为一个脆弱的区域，破坏开始在压缩。通过应变统计分析，建立了单轴压缩下WFGRAC的本构模型，并证明该模型能有效反映观测到的应力-应变关系。

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

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.