A study on the influence of aggregate shape on the aggregate void ratio and stress-strain performance of pervious concrete (PC)

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-06-28 DOI:10.1016/j.dibe.2025.100704

Xiaoye Dong , Di Wu , Xiaochun Xiao , Haiting Lu , Xin Ding

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引用次数: 0

Abstract

Aggregate morphology is essential for studying the mechanical properties of PC. This study captures the true morphology of aggregates and classifies them using shape indices such as the Flatness Index (FI) and Elongation Index (EI). The Discrete Element Method (DEM) is utilized to investigate the impact of aggregate morphological parameters on void ratio and pore space distribution. Uniaxial compression DEM numerical simulations are used to evaluate the macroscopic mechanical responses and stress-strain relationships of PCs with various aggregate shapes. The results indicate that regular aggregate shapes can reduce void ratio and enhance load-bearing capacity. While the effect of aggregate shape on the ascending branch of the normalized stress-strain curve is limited, increased aggregate shape irregularity results in a steeper descending branch. Based on this, a stress-strain relationship evaluation equation for PCs with different aggregate shapes has been established, providing a reliable method for predicting their mechanical properties.

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骨料形状对透水混凝土（PC）骨料空隙率及应力-应变性能影响的研究

聚集体形态是研究聚丙烯腈力学性能的关键。本研究捕捉了聚集体的真实形态，并使用形状指数（如平坦度指数（FI）和延伸指数（EI））对它们进行分类。利用离散元法（DEM）研究了聚集体形态参数对孔隙比和孔隙空间分布的影响。采用单轴压缩DEM数值模拟方法，对不同骨料形状的pc的宏观力学响应和应力-应变关系进行了评价。结果表明，规则的骨料形状可以降低孔隙率，提高承载能力。虽然骨料形状对归一化应力-应变曲线上升分支的影响有限，但骨料形状不规则性的增加导致下降分支更陡峭。在此基础上，建立了不同骨料形状pc的应力-应变关系评价方程，为预测pc的力学性能提供了可靠的方法。

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

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.