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路面纤维混凝土韧性试验研究

, PP. 33-39

Keywords: 道路工程,纤维混凝土,试验研究,韧性,弯拉强度

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Abstract:

？为获取纤维混凝土的荷载-挠度曲线,研究纤维对纤维混凝土韧度的影响,配制8组混杂纤维混凝土试件进行韧度试验,利用独立于试验机的数据采集装置获取试件的荷载-挠度曲线,分析不同纤维种类和掺量对纤维混凝土韧度指数的影响,并研究了韧度指数同弯拉强度的关系。结果表明:钢纤维对弯拉强度的贡献较大;铣削型钢纤维与仿钢丝聚丙烯纤维的组合对韧度的贡献最大,针状钢纤维混凝土的韧度随着纤维掺量的增加而增大;韧度指数随着纤维体积率和纤维根数的增加而增加;韧度指数高的试件弯拉强度不一定大,弯拉强度为6.7MPa对应着韧度指数的最低值。

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