2023年 05期

硅灰掺量对纤维混凝土力学性能影响试验研究

Experimental Research on Influences of Silica Fume Content on Mechanical Properties of Fibre Concrete


摘要(Abstract):

为了探究硅灰替换水泥掺入纤维混凝土后 ,纤维混凝土抗压、抗折、抗初裂冲击和抗破坏冲击等性能的优劣,在掺加硅灰的质量分数为0.5%、7.5% 、10%时,对纤维素纤维与聚乙烯纤维体积质量均为0.9kg/m3的纤维混凝土试件进行破坏分析与力学性能分析。结果表明:当硅灰质量分数为5.0% 时 ,纤维混凝土的抗压强度、抗破坏冲击耗能达到最佳,分别为53.5MPa、9417.6kJ;当硅灰质量分数为7.5% 时,纤维混凝土的抗初裂冲击耗能为6621.8kJ,达到最佳;硅灰的掺加使纤维混凝土的抗折强度减小,掺量过大会导致纤维混凝土力学性能劣化。

关键词(KeyWords): 纤维混凝土;硅灰;力学试验;抗压强度;抗折强度;抗冲击性能

基金项目(Foundation): 国家自然科学基金青年科学基金项目(52108214) ; 山东省住房城乡建设科学技术计划项目(2020-K5-18) ; 建筑结构加固改造与地下空间工程教育部重点实验室开放课题项目(MEKL202006)

作者(Author): 周代昱,谢群,赵鹏,鞠好学,张鸿

DOI: DOI:10.13349/j.cnki.jdxbn.20221206.001

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