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为了提高再生混凝土的抗裂性能,扩大再生混凝土的适用范围,在再生混凝土中改变不同种类有机纤维组合,试验分析其力学性能及其梁的抗裂性能。其结果如下:不同组合有机纤维对再生混凝土的抗压强度无明显影响,而对再生混凝土的劈拉强度有一定的提高。随着有机纤维不同组合变化再生混凝土梁的抗裂性逐步得到提高,其中同时掺粗聚丙烯纤维和聚丙烯腈纤维的A3组梁抗裂性有较为明显的提高。
In order to improve the crack resistance of recycled concrete, expand the applicable scope of recycled concrete, change the combination of different types of organic fibers in recycled concrete, and test the mechanical properties and crack resistance of beams. The results are as follows: Different combinations of organic fibers have no significant effect on the compressive strength of recycled concrete, but the tensile strength of recycled concrete has a certain increase. With the different combinations of organic fibers, the crack resistance of recycled concrete beams has been gradually improved, and the crack resistance of A3 beams with both polypropylene fibers and polyacrylonitrile fibers at the same time has been significantly improved.