轻质自固结纤维增强混凝土的性能研究

Proceedings of the 4th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'19) Pub Date : 2020-11-01 DOI:10.11159/iccste20.245

K. Hossain, I. N. Celasun, K. M. Y. Julkarnine, M. Hossain

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引用次数: 0

摘要

本文研究了聚乙烯(PE)、聚乙烯醇(PVA)、高密度聚乙烯(HDPE)和橡胶屑四种不同类型的纤维对轻质自固结纤维混凝土(LWSCFRC)各项性能的影响。根据坍落度、密度、抗压/弯曲强度和快速氯化物渗透特性，评价了纤维类型和用量的影响。所有混凝土混合料均表现出坍落度流动和28天抗压强度分别大于500 mm和17.8 MPa, 28天空气干密度小于1840 kg/m，符合结构性低水细混凝土的分类标准。随着纤维掺量的增加，LWFRSCC混合料的抗压强度和坍落度减小。与未添加纤维的低密度轻质混凝土相比，低密度轻质混凝土具有较低的抗压与抗折强度比、较高的吸能/韧性和相似或更好的氯离子渗透性。

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Properties of Lightweight Self-consolidating Fibre Reinforced Concrete

This paper presents the influence of four different types of fibres such as Polyethylene (PE), Polyvinyl Alcohol (PVA), HighDensity Polyethylene (HDPE) and Crumb Rubber on various properties of lightweight self-consolidating fibre reinforced concrete (LWSCFRC). The influences of fibre types and dosages were evaluated based on slump flow, density, compressive/flexural strength and rapid chloride permeability characteristics. All concrete mixtures satisfied the criteria to be classified as structural LWSCC by exhibiting a slump flow and 28-day compressive strength of more than 500 mm and 17.8 MPa, respectively with a 28-day air dry density of less than 1840 kg/m. The compressive strength and slump flow of LWFRSCC mixtures decreased with the increase of fibre dosage. The good performance of LWSCFRC mixtures were reflected in terms of their lower compressive strength to flexural strength ratio, higher energy absorbing/toughness capacity and similar/better chloride permeability compared to their LWSCC counterpart (without fibre).

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Proceedings of the 4th International Conference on Civil, Structural and Transportation Engineering (ICCSTE'19)

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