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以硅粉含量和混杂纤维含量为试验参数,将1根普通混凝土梁作为对照组,3根不同硅粉含量和2根混杂纤维不同体积含量的梁作为试验组,对改性再生混凝土梁的抗弯性能进行分析,结果表明:改性再生混凝土梁与普通再生混凝土梁的破坏过程一样都具有明显的四个阶段,而且其基本受力过程也符合平截面假定;而且随着硅粉和混杂纤维的掺入使得改性再生混凝土梁的抗弯性能增强,抗开裂和极限承载力方面优于普通再生混凝土梁;而且按照规范计算出来的正截面极限承载力与试验值基本吻合,改性再生混凝土可以按照规范进行设计,为工程实践提供了参考依据。
Taking the silicon powder content and the hybrid fiber content as the experimental parameters, one ordinary concrete beam was used as a control group, three beams with different silicon powder contents and two mixed fiber different volume contents were used as test groups, and the resistance of the modified recycled concrete beams The results show that the modified recycled concrete beams have obvious four stages as the failure process of ordinary recycled concrete beams, and the basic force process also accords with the plane section assumption. And with the increase of the ratio of silica fume and hybrid fiber Makes the flexural performance of modified recycled concrete beam stronger than that of ordinary recycled concrete beam in terms of cracking resistance and ultimate bearing capacity. Moreover, the ultimate bearing capacity of normal section calculated according to the specifications is in good agreement with the experimental value. The modified recycled concrete It can be designed according to the standard, which provides a reference for engineering practice.