Morphology-based indices and recommended sampling sizes for using image-based methods to quantify degradations of compacted aggregate materials
Morphology-based indices and recommended sampling sizes for using image-based methods to quantify degradations of compacted aggregate materials
复制标题
基于形态的指数和建议的采样大小，用于使用基于图像的方法量化压实骨料的降解
DOI：
10.1016/j.conbuildmat.2019.116970
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发表时间：
2020-01-10
影响因子：
7.4
通讯作者：
Li, Jia
中科院分区：
文献类型：
--
作者：
Li, Cheng;Zheng, Junxing;Li, Jia
破碎骨料的颗粒破碎和磨损可能会导致颗粒形态发生显着变化，从而对其工程性能产生不利影响。先前的研究已经确定了更准确、更快速地量化颗粒形态变化的研究需求，并建立了控制施工过程中搬运和压实引起的骨料降解的规范。在这项研究中，作者之前开发了一种实验室测试方法，称为旋转磨损和图像分析（GALA）测试，对五种骨料进行了测试，以评估它们在模拟压实载荷条件下的颗粒破碎和磨损特性。基于实验室测试和图像分析数据，本文提出了新的指标来量化骨料颗粒形态变化的破碎和磨损特性，并推荐了使用基于二维图像的分析方法量化骨料颗粒尺寸和形态分布的最小代表性样本尺寸。先前开发的GALA测试、提出的基于形态的骨料破碎和磨损指数以及骨料二维图像分析的推荐采样尺寸可以帮助研究人员和实践者快速、准确地量化骨料在实验室各种模拟压实荷载下的破碎和磨损特性，这可能有助于制定现场QC/QA规范来控制因搬运和压实引起的骨料退化。 (C) 2019 Elsevier Ltd. 保留所有权利。
Particle breakage and abrasion of crushed aggregate materials may cause significant changes in particle morphologies, which can adversely affect their engineering properties. Previous studies have identified the research needs of more accurately and quickly quantifying particle morphology changes and establishing specifications for controlling aggregate degradation caused by handling and compaction during constructions. In this study, a previously developed laboratory testing method by the authors, termed the Gyratory Abrasion and Image Analysis (GALA) test, was conducted on five types of aggregate materials to evaluate their particle breakage and abrasion characteristics under simulated compaction loading conditions. Based on the laboratory testing and image analysis data, this paper proposes new indices to quantify the breakage and abrasion characteristics in terms of changes in the particle morphologies of aggregate materials and also recommends the minimum representative sample sizes for using 2D image-based analysis methods to quantify distributions of the particle size and morphology of aggregate materials. The previously developed GALA test, the proposed morphology-based aggregate breakage and abrasion indices, and the recommended sampling sizes for 2D image analysis of aggregate materials can help both researchers and practitioners to quickly and accurately quantify the breakage and abrasion characteristics of aggregate materials under various simulated compaction loads in laboratory, which may help to develop field QC/QA specifications to control the aggregate degradation caused by handling and compaction. (C) 2019 Elsevier Ltd. All rights reserved.