玻璃纤维改善轻膨胀粘土集料混凝土梁性能的试验研究

IF 1.2 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frattura ed Integrita Strutturale Pub Date : 2023-06-22 DOI:10.3221/igf-esis.65.01

Louay Aboul Nour, Mariam Gamal, Amr Ghoniem

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引用次数: 0

摘要

由轻膨胀粘土骨料(LECA)和玻璃纤维配制而成的混凝土具有良好的性能、耐久性和可持续性。为此，实验研究被设计为研究立方体、圆柱体和简支梁。4种混合料替代粗骨料LECA体积为0%、75%、85%和95%，玻璃纤维含量为2% (N、L75、L85和L95)，另外2种混合料LECA体积为75%，玻璃纤维含量为1%和1.5% (L75- f1和L75- f1.5)。结果表明，与普通混凝土相比，加入更多的玻璃纤维使样品重量减轻，坍落度降低。增加混合料中玻璃纤维的体积对抗拉强度有负面影响，但对抗压强度有提高作用。L85的抗弯矩和吸能能力分别提高了7.5%和10.3%。L75-F1试件的梁刚度和延性分别提高了14.8%和14.3%。

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Glass Fiber for Improved Behavior of Light Expanded Clay Aggregate Concrete Beams: An Experimental Study

Concrete developed from light expanded clay aggregate (LECA) and glass fiber has good performance, durability, and sustainability. Towards this, the experimental investigation was designed to study cubes, cylinders, and simply supported beams. Four mixtures had LECA volume of 0%, 75%, 85%, and 95% as coarse aggregate replacement and glass fiber content volume of 2% (N, L75, L85, and L95), and the other two mixtures had 75% LECA and glass fiber content of 1% and 1.5% (L75-F1 and L75-F1.5). Results compared to normal concrete showed the weight reduction of samples while adding more glass fiber caused slump reduction in contrast to LECA. Increasing glass fiber volume in the mixture had a negative influence on tensile strength while causing compressive strength enhancement. Moment resistance and energy absorption capacity of L85 were enhanced by 7.5% and 10.3%, respectively. For L75-F1 specimens, the beam stiffness and ductility were enhanced by 14.8% and 14.3%, respectively.

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