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层布式钢纤维混凝土的抗折强度的影响因素分析 总被引:2,自引:2,他引:0
试验研究了不同长径比和掺配率对层布式钢纤维混凝土的抗折强度的影响规律,确定最佳长径比和掺配率;结合本课题组以往的试验和国内有代表性试验,分析影响层布式钢纤维混凝土抗折强度的主要因素:钢纤维长径比、掺配率、减水剂、纤维型状. 相似文献
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DAI Shao-bin SONG Ming-hai HUANG Jun 《武汉大学学报:自然科学英文版》2005,10(5):883-886
The influence of two main characteristics of steel fiber, the aspect ratio (Df) and volume fraction (ρf), on the bending strength of Layered Steel Fiber Reinforced Concrete (LSFRC) is investigated by using orthogonal test. Via the variance analysis on the experimental results and trend analysis on the two characteristics, Df is found significantly related to the bending strength of LSFRC. The influence ratio is 63.3%. The bending strength of LSFRC increases if Df increases, makes better when Df reaches 100. ρf has ordinary influence on the bending strength of LSFRC. The influence ratio is 29.2%. Other characteristics, such as the shape of steel fiber and the mix proportion, have less influence. The best ρf contributing to the bending strength of LSFRC is 1.5 %. If ρf is greater than 1.5%, it has negative influence on the bending strength of LSFRC. So, ρf makes a limited contribution to the bending strength of LSFRC. 相似文献
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