PAN基碳纤维掺量对再生混凝土抗压和抗渗性能的影响

Effect of PAN Based Carbon Fiber Content on Compressive and Impervious Performance of Recycled Concrete

为了提高再生混凝土的抗压和抗渗性能,制备了含不同聚丙烯腈(PAN)基碳纤维掺量的再生混凝土,并对其抗压和抗渗性能进行测试。研究结果表明:再生混凝土抗压强度随着碳纤维掺量的增大呈现先上升后下降的趋势,且其增大的幅度明显小于其下降的幅度;渗水高度呈现先减小后增大的趋势,表示混凝土的抗渗性能先增大后减小,因此碳纤维掺量为4%时功能型再生混凝土的抗渗性能最佳。

In order to improve the compressive and impervious properties of recycled concrete,the recycled concrete with different PAN based carbon fiber content was prepared,and its compressive and impervious properties were tested experimentally.The results show that the compressive strength of recycled concrete increases first and then decreases with the increase of carbon fiber content,and the increase is obviously smaller than the decrease.The water penetration height decreases first and then increases with the increase of carbon fiber content,indicating that the impervious performance of concrete increases first and then de⁃creases.The impervious performance of functional recycled concrete is the best when the carbon fiber con⁃tent is 4%.