利用回收废料加固混凝土板的冲孔技术

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-01 DOI:10.2478/jaes-2024-0011

K. Hassani, D. Atlaoui, Y. Bouafia

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引用次数: 0

摘要

本研究旨在通过实验评估使用两种纤维（金属纤维（MF）和基于聚丙烯纤维（PPG）的网格）加固的混凝土板的机械性能。金属纤维来自钢铁部件的加工废料，随机分布在混凝土中，而聚丙烯纤维则排列成网格状。调查包括在 [25x50x7] 立方厘米的板上进行的冲压试验，以及在直径为 Ø16 厘米、高为 H32 厘米的圆柱体上进行的压缩试验。此外，还对纤维的机械阻力和撕裂特性进行了评估。混凝土的成分是通过 "Dreux-Gorisse "实验法确定的。研究了五种不同的金属纤维含量（MF）（W=0.2%、W=0.4%、W=0.6%、W=0.8% 和 W=1%），以及与基质成分相同的无纤维（W=0%）混凝土对照样本（BT）。考虑了基于小网格聚丙烯纤维（PPG/SM）和大网格聚丙烯纤维（PPG/LM）配置的两种网格变体。结果对比分析表明，当纤维含量 W=0.8% 时，金属纤维（MF）比小网格（PPG/SM）和大网格（PPG/LM）中的聚丙烯纤维更有效地增强了阻力和刚度，从而限制了穿刺裂缝的形成。

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Punching of Concrete Slabs Reinforced by Recycling Waste

This study aims to experimentally evaluate the mechanical properties of concrete slabs reinforced with two types of fibers: metallic fibers (MF) and grids based on polypropylene fibers (PPG). The metallic fibers, sourced from machining waste of steel parts, are randomly distributed in the concrete, while the polypropylene fibers are arranged in grids. The investigation includes punching tests conducted on slabs measuring [25x50x7] cm³, as well as compression tests on cylinders with a diameter of Ø16 cm and a height of H32 cm. Mechanical resistance and tearing characteristics of the fibers were also assessed. The concrete’s composition was determined using the experimental “Dreux-Gorisse” method. Five different metal fiber contents (MF) were studied (W=0.2%, W=0.4%, W=0.6%, W=0.8%, and W=1%), alongside a control concrete sample (BT) with no fibers (W=0%) having the same composition as the matrix. Two variants of grids based on small-mesh polypropylene fibers (PPG/SM) and large-mesh (PPG/LM) configurations were considered. The comparative analysis of the results highlights that, at a fiber content of W=0.8%, metallic fibers (MF) enhance both resistance and rigidity more effectively than polypropylene fibers in small meshes (PPG/SM) and large meshes (PPG/LM), thereby limiting the formation of puncturing cracks.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.