加掺粉煤灰再生混凝土梁受弯性能试验研究

Experimental study on flexural behavior of recycled concrete beam mixing fly ash

受弯性能是混凝土梁主要性能之一,通过4根不同掺量粉煤灰再生混凝土梁的受弯性能试验,研究了不同粉煤灰掺量的再生混凝土梁抗弯能力、挠度变形及平截面假定等性能。根据受弯性能试验结果与《混凝土结构设计规范》中混凝土梁的正截面极限承载力计算公式计算值比较,给出了加掺粉煤灰再生混凝土梁的设计建议。试验及分析结果表明,若粉煤灰掺量合适,再生混凝土梁具有较好的受力性能,可用于混凝土抗弯构件。

Flexural property is the main mechanical property of recycled concrete beam. From the tests of four concrete different admixture amounts of fly ash,research the bending resistance,deflection deformation and the plane section assumption. At the same time the laws and test results are compared and analyzed in this paper,and design suggestion of recycled concrete mixing fly ash beam is given. The tests show that recycled concrete mixing fly ash has better mechanical behavior and ability of deformation,so recycled concrete mixing fly ash can be used for bending elements.