Statistical variations in impact resistance of polypropylene fibre-reinforced concrete
Statistical variations in impact resistance of polypropylene fibre-reinforced concrete
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DOI：
10.1016/j.ijimpeng.2005.05.003
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发表时间：
2006-11-01
影响因子：
5.1
通讯作者：
Platten, AK
中科院分区：
文献类型：
--
作者：
Badr, A;Ashour, AF;Platten, AK
采用ACI委员会544推荐的反复落锤冲击试验，研究了聚丙烯纤维混凝土(FRC)的抗冲击性能。根据统计方法对结果进行了分析。对同一批次内和不同批次之间的结果差异进行了检查。统计参数与报道的用其他类型的纤维如碳纤维和钢纤维增强的混凝土复合材料的抗冲击性能的变化进行了比较。统计分析表明，本次试验的结果差异很大，有必要将重复次数增加到每个混凝土配合料至少40个试件，以确保误差在10%以下。得出的结论是，按照目前的程序和建议，该试验不应被视为可靠的冲击试验。这项研究强调了修改这项测试的必要性，以提高其准确性并减少结果的巨大差异。(C)2005爱思唯尔有限公司。保留所有权利。
The impact resistance of polypropylene fibre-reinforced concrete (FRC) was investigated using the repeated drop-weight impact test recommended by ACI Committee 544. The results were analysed based on a statistical approach. The variation in results was examined within the same batch and between different batches. Statistical parameters were compared with reported variations in impact resistance of concrete composites reinforced with other types of fibres such as carbon and steel fibres. Statistical analysis indicated that the results obtained from this test had large variations and it is necessary to increase the number of replications to at least 40 specimens per concrete mix to assure an error below 10%. It is concluded that this test with its current procedures and recommendations should not be considered as a reliable impact test. This study has highlighted the need for modifying this test in such a way as to increase its accuracy and reduce the large variation in results. (C) 2005 Elsevier Ltd. All rights reserved.