Durability and fire resistance of high-performance fiber reinforced concrete with fly ash

Harendra Yadav, Shashikant Kumar, Baboo Rai
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Abstract

ABSTRACTHigh-performance concrete (HPC) is currently widely utilised in the civil engineering and construction industry. The rising use of HPC in structural applications, as well as the necessity to justify fire resistance, has prompted numerous laboratories to research high-temperature characteristics. The relevant properties of HPC with polypropylene fiber (PPF) and fly ash (FA) were determined through an experimental study. This paper presents some key aspects related to compressive strength for High-Performance Fiber Reinforced Concrete (HPFRC) with and without FA at high temperatures ranging from 100°C to 800°C for use in fire resistance calculations. Visual investigation revealed a change in colour as the temperature rose. It may be used as a guide for maintaining, designing, and predicting the life of HPC structures, such as high-rise buildings that are exposed to high temperatures. Detailed research on the mechanical and durability characteristics like the workability of fresh concrete, as well as compressive strength, modulus of elasticity, drying shrinkage, water permeability, and sorptivity coefficient of hardened concrete containing PPF and FA is also reported in this paper. FA concentration in concrete mixtures was 0%, 10%, 20%, 30%, and 40% on a mass basis, with fibre volume fraction ranging from 0% to 0.3% on a volume basis.KEYWORDS: High-performance fiber reinforced concretepolypropylene fiberfly ashdrying shrinkagewater permeabilitysorptivity Disclosure statementNo potential conflict of interest was reported by the author(s).
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掺粉煤灰高性能纤维增强混凝土的耐久性和耐火性能
高性能混凝土(HPC)目前在土木工程和建筑行业得到了广泛的应用。高性能混凝土在结构应用中的应用越来越多,以及证明耐火的必要性,促使许多实验室研究高温特性。通过实验研究,确定了聚丙烯纤维(PPF)和粉煤灰(FA)对高性能混凝土的相关性能。本文介绍了与高性能纤维增强混凝土(HPFRC)在100°C至800°C高温下的抗压强度相关的一些关键方面,用于耐火计算。目测显示,随着温度的升高,颜色发生了变化。它可以作为高温下高层建筑等高性能混凝土结构的维护、设计和寿命预测的指南。本文还详细研究了新拌混凝土的和易性、抗压强度、弹性模量、干收缩率、透水性和吸水系数等力学和耐久性特性。混凝土混合料中FA的质量浓度分别为0%、10%、20%、30%和40%,纤维体积分数为0%至0.3%。关键词:高性能纤维增强混凝土;聚丙烯纤维;粉煤灰;干燥收缩;
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
CiteScore
3.90
自引率
9.50%
发文量
24
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