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首页> 外文会议>RILEM Proceedings PRO 39; RILEM Symposium on Fibre-Reinforced Concretes(FRC) - BEFIB 2004 vol.1; 20040920-22; Varenna(IT) >RHEOLOGICAL PROPERTIES AND FRACTURE PROCESSES OF HFC
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RHEOLOGICAL PROPERTIES AND FRACTURE PROCESSES OF HFC

机译：氢氟碳化合物的流变性质和断裂过程

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摘要

In order to find the optimum mixture for hybrid steel fibre reinforced self compacting concrete, a test series with different fibre-to-fibre ratios were carried out. Different fibre amounts which were used for the above mentioned fibre-to-fibre ratios can be expressed using the fibre factor. This parameter varied between 1.5 and 3.0 in all the test series. Several rheological tests were performed to assess whether the mixes were self-compacting or not. The research presented suggests that a new fresh concrete properties test has to be developed for HFC. Also, the influence of the state of moisture of the rheological testing equipment has been investigated. After these rheological tests, investigations of the mechanical properties, i.e. 'standard' bending and compressive strength, were carried out. In order to assess the effect of specimen geometry, boundary conditions and fibre distribution, a test series based on hybrid fibre concrete with a fibre factor of 2.15 and a fibre-to-fibre ratio of 8:1:1 was carried out using the pendulum-bar four-point bending test. After the tests crack patterns were recovered. It seems to be possible to compare bending strength based on results from specimens with different geometries. For that, the volume-to-moulded-surface ratio seems to be a suitable parameter.
机译：为了找到混合钢纤维增强自密实混凝土的最佳混合料，进行了一系列不同纤维比的试验。可以使用纤维因子表示用于上述纤维对纤维比率的不同纤维量。在所有测试系列中，此参数在1.5和3.0之间变化。进行了几次流变测试，以评估混合物是否是自密实的。提出的研究表明，必须为HFC开发新的新鲜混凝土性能测试。另外，还研究了流变测试设备的水分状态的影响。在这些流变测试之后，进行了机械性能的研究，即“标准”弯曲和抗压强度。为了评估试样几何形状，边界条件和纤维分布的影响，使用摆锤对纤维系数为2.15，纤维与纤维比率为8：1：1的混合纤维混凝土进行了一系列测试杆四点弯曲测试。在测试之后，裂纹图案被恢复。似乎有可能根据具有不同几何形状的试样的结果来比较弯曲强度。为此，体积与模制表面的比例似乎是合适的参数。

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