Hybridisation effect of steel-polypropylene fibres in high volume fly ash concrete

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Magazine of Concrete Research Pub Date : 2023-05-31 DOI:10.1680/jmacr.22.00278

Onkareshwar Mishra, S. Singh, Shweta Mishra

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Abstract

The paper presents result of an investigation conducted to investigate the footprints of fibre's hybridisation on workability, compressive strength, flexural strength and flexural toughness of High Volume Fly Ash Concrete (HVFAC). Different proportions of Polypropylene (PP) and Steel (S)fibres i.e. 100%PP-0%S, 75%PP-25%S%, 50%PP-50%S, 25%PP-75%S and 0%PP-100%S, were incorporated at the total fibre volume fraction of 1.0%. Further, three different methods JCI, ASTM C 1018 and ASTM C 1609 were used for comparative evaluation of various parameters such as toughness, residual strength etc. It was observed that the concrete mixes with higher percentage of PP fibres resulted in lower workability as compared to mixes made with higher percentage of S fibres. Moreover, the concrete mix with 25%PP-75%S fibre combination showed the best results among all concrete mixes and is considered to be the most appropriate for hybridization in HVFAC. Highlights · Effect of hybridization of steel and polypropylene fibres at different percent combination on workability, compressive strength and flexural strength of HVFAC has been investigated. · Flexural toughness of HVFAC incorporated with different percent combination of steel and polypropylene fibres via enumerating various parameters like toughness, residual strength, first and ultimate crack strength, deflection etc. have been determined. · Comparison between different methods i.e. JCI, ASTM C 1018 and ASTM C 1609 has been highlighted. · The mix with 25%PP-75%S (M5) fibre combination showed the best results among all other concrete mixes and is considered to be the most auspicious hybrid fibre combination for enhancing the above given properties.

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钢-聚丙烯纤维在大体积粉煤灰混凝土中的混杂效应

本文介绍了一项研究结果，旨在研究纤维混杂对大体积粉煤灰混凝土（HVFAC）工作性能、抗压强度、抗弯强度和抗弯韧性的影响。不同比例的聚丙烯（PP）和钢（S）纤维，即100%PP-0%S、75%P-25%S%、50%PP-50%S、25%P-75%S和0%PP-100%S，以1.0%的总纤维体积分数加入。此外，使用三种不同的方法JCI、ASTM C 1018和ASTM C 1609对韧性、残余强度等各种参数进行比较评估。观察到，与用较高百分比的S纤维制成的混合物相比，具有较高百分比的PP纤维的混凝土混合物导致较低的可加工性。此外，在所有混凝土混合物中，含有25%PP-75%S纤维组合的混凝土混合物显示出最好的结果，并且被认为是最适合在HVFAC中杂交的。亮点·研究了钢纤维和聚丙烯纤维在不同组合百分比下的杂交对HVFAC的工作性能、抗压强度和抗弯强度的影响·通过列举韧性、残余强度、初裂强度和极限断裂强度、挠度等参数，测定了不同比例钢纤维和聚丙烯纤维复合HVFAC的弯曲韧性·强调了不同方法（即JCI、ASTM C 1018和ASTM C 1609）之间的比较·在所有其他混凝土混合物中，含有25%PP-75%S（M5）纤维组合的混合物显示出最好的结果，并且被认为是增强上述性能的最有利的混合纤维组合。

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

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.