Wang Jiajing, Wang Chenghao, Ji Yongcheng, Qie Ruihang, Wang Dayang, Liu Guanxun
School of Aulin, Northeast Forestry University, Harbin 150040, China.
School of Civil Engineering and Transportation, Northeast Forestry University, Harbin 150040, China.
Materials (Basel). 2024 Jul 18;17(14):3565. doi: 10.3390/ma17143565.
In recent years, wind energy has begun to receive a significant amount of attention as clean energy is utilised and demanded in large quantities, resulting in a sharp increase in the use of wind turbines. The demand for wind turbines has gradually risen due to the clean and recyclable nature of wind energy. The current blade life of wind turbines in China is about 20 years, which means that the disposal of obsolete used blades can become a difficult problem in the future. Therefore, this study is of great significance to explore the regeneration performance of the blades after recycling and disposal. In this paper, wind turbine blades were mechanically recycled into recycled macrofibres, which were added to concrete as a reinforcing material to make wind impeller fibre concrete (WIC), and the three proportion ratios of 1%, 1.5%, and 2% were explored to compare the performance. The performance of WIC was also evaluated and its performance was compared to that of glass fibre concrete (GC). In addition, the material physical properties of second-generation recycled aggregate concrete (RAC) based on WIC were explored. The strength and peak strain variations and their causal mechanisms were analysed both macroscopically and microscopically by means of the classical mechanical tests (compression and bending tests), SEM, and XRD. The results show that the compressive strength of WIC was negatively correlated with the fibre content and increased by 6.04-18.12% compared to that of ordinary concrete (OG), with a maximum of 19.25 MPa; the flexural strength was positively correlated with the fibre content, with an increase of 5.37-18.5%. The microstructural analysis confirmed the macroscopic results and the intrinsic model better validated the experimental results.
近年来，随着清洁能源被大量利用和需求，风能开始受到广泛关注，风力涡轮机的使用量急剧增加。由于风能具有清洁和可回收的特性，对风力涡轮机的需求逐渐上升。目前中国风力涡轮机叶片的使用寿命约为20年，这意味着废弃旧叶片的处理在未来可能成为一个难题。因此，本研究对于探索叶片回收处理后的再生性能具有重要意义。本文将风力涡轮机叶片机械回收成再生宏观纤维，将其作为增强材料添加到混凝土中制成风力叶轮纤维混凝土（WIC），并探索了1%、1.5%和2%这三种配比，以比较其性能。还对WIC的性能进行了评估，并与玻璃纤维混凝土（GC）的性能进行了比较。此外，还探索了基于WIC的第二代再生骨料混凝土（RAC）的材料物理性能。通过经典力学试验（压缩和弯曲试验）、扫描电子显微镜（SEM）和X射线衍射（XRD），从宏观和微观层面分析了强度和峰值应变的变化及其因果机制。结果表明，WIC的抗压强度与纤维含量呈负相关，与普通混凝土（OG）相比提高了6.04 - 18.12%，最高可达19.25MPa；抗弯强度与纤维含量呈正相关，提高了5.37 - 18.5%。微观结构分析证实了宏观结果，内在模型更好地验证了实验结果。
