Zhang Xutao, Wang Junyu, Lou Chao
School of Architecture and Civil Engineering, Liaocheng University, Liaocheng, 252059, China.
Heliyon. 2024 Jul 5;10(13):e34208. doi: 10.1016/j.heliyon.2024.e34208. eCollection 2024 Jul 15.
In order to investigate the tensile properties of basalt fibre reinforced recycled aggregate concrete (BFRAC), the axial tensile tests were carried out on BFRAC specimens using the concrete axial tensile testing device. The effects of basalt fibre (BF) content and recycled aggregate replacement rate on the tensile properties of BFRAC were quantitatively investigated, and the tensile damage mechanism of BFRAC was analysed. The following conclusions were drawn: The volume fraction of BF had the most prominent effect on the axial tensile properties of BFRAC. The axial tensile strength and peak tensile strain of BFRAC both showed the change rule of first increasing and then decreasing with the increase of BF volume fraction. The replacement rate of recycled aggregate is negatively correlated with the tensile properties of BFRAC. The larger the replacement rate, the worse the tensile properties of BFRAC. When the replacement rate of recycled aggregate is 30 % and the volume fraction of BF is 0.3 %, the tensile properties of BFRAC are better, as well as its economic and environmental performance. The axial tensile strength and peak tensile strain were 2.08 MPa and 114 × 10, respectively. BFRAC exhibits the toughening and crack arresting effect of BF, and the crack development is relatively slow, showing more obvious plastic damage characteristics.
为了研究玄武岩纤维增强再生骨料混凝土（BFRAC）的拉伸性能，采用混凝土轴拉试验装置对BFRAC试件进行了轴向拉伸试验。定量研究了玄武岩纤维（BF）含量和再生骨料取代率对BFRAC拉伸性能的影响，并分析了BFRAC的拉伸破坏机理。得出以下结论：BF体积分数对BFRAC的轴向拉伸性能影响最为显著。BFRAC的轴向抗拉强度和峰值拉应变均随BF体积分数的增加呈现先增大后减小的变化规律。再生骨料取代率与BFRAC的拉伸性能呈负相关。取代率越大，BFRAC的拉伸性能越差。当再生骨料取代率为30%且BF体积分数为0.3%时，BFRAC的拉伸性能较好，其经济和环境性能也较好。轴向抗拉强度和峰值拉应变分别为2.08MPa和114×10。BFRAC表现出BF的增韧和阻裂效果，裂缝发展相对缓慢，呈现出更明显的塑性破坏特征。
