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首页> 外文期刊>Magazine of Concrete Research >Properties of self-consolidating rubberised concrete reinforced with synthetic fibres
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Properties of self-consolidating rubberised concrete reinforced with synthetic fibres

机译：合成纤维增强的自固性橡胶混凝土的性能

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摘要

The aim of this study was to develop and optimise self-consolidating rubberised concrete (SCRC) modified by different types and volumes of synthetic fibres (SFs). Steel fibres were also tested in this investigation for comparison. The investigation particularly sought to utilise the beneficial effect of fibres to alleviate the reduction in splitting tensile and flexural strengths resulting from adding crumb rubber (CR) to SCRC mixtures. The results indicated that the addition of SFs reduced the fresh properties, which limited the maximum percentage of CR that could be used in SCRC mixtures to 20%, compared to 30% maximum percentage of CR used in developing successful SCRC mixtures without SFs. However, the use of SFs beneficially contributed to alleviating the reduction in the splitting tensile strength and flexural strength of SCRC mixtures resulting from adding CR. Although increasing the length of SFs further reduced the fresh properties of the mixtures, this also enhanced further the splitting tensile and flexural strengths of SCRC mixtures. The results also showed that when self-compactability was disregarded, it was possible to use a higher combination of CR (30%) and fibre (1% volume fraction) in the development of vibrated rubberised concrete, resulting in mixtures with further improvements in splitting tensile and flexural strengths, and reduced self-weight.
机译：这项研究的目的是开发和优化由不同类型和体积的合成纤维（SFs）改性的自固性橡胶混凝土（SCRC）。在此研究中还对钢纤维进行了测试以进行比较。该研究特别寻求利用纤维的有益效果来减轻由于向SCRC混合物中添加粒状橡胶（CR）而导致的劈裂拉伸强度和弯曲强度的降低。结果表明，SF的添加降低了新鲜特性，将可用于SCRC混合物中的CR的最大百分比限制为20％，而成功开发不含SF的SCRC混合物中使用的CR的最大百分比为30％。然而，SF的使用有益地有助于减轻由于添加CR而导致的SCRC混合物的劈裂拉伸强度和挠曲强度的降低。尽管增加SF的长度进一步降低了混合物的新鲜性能，但这也进一步增强了SCRC混合物的劈裂抗张强度和弯曲强度。结果还表明，如果忽略自密实性，则在开发振动橡胶混凝土时可以使用较高的CR（30％）和纤维（体积分数为1％）的组合，从而导致混合物的裂化性能得到进一步改善抗拉和抗弯强度，并减轻自重。

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