Volume 2,Issue 9
再生陶瓷骨料粒径及替代率对UHPC 力学性能的影响
将废弃瓷砖经破碎、筛分后作为细骨料替代石英砂制备UHPC，可实现陶瓷固废的资源化利用。为探究再生陶瓷骨料（RCA）对UHPC 力学性能与耐久性能的影响规律与作用机制，本文以最大粒径（Dmax）和替代率（Rc）为变量，设计了15组不同配合比的再生陶瓷细骨料UHPC 试件，通过抗压强度试验、抗弯强度试验分析，系统研究了各组试件的宏观性能演变。结果表明：抗压强度随Dmax 与Rc 的提高总体呈上升趋势，但存在边界效应—Rc<50% 时，部分低替代率组（如Dmax=1.25mm、Rc=30%）因骨料- 基体界面适配性不足出现强度波动（较基准组下降5.57%）；当Rc ≥50% 时，各组抗压强度显著且持续提升，Dmax=5mm、Rc=100% 时达峰值171MPa。抗弯强度则受粒径与替代率的反向调控，Dmax=1.25mm、Rc=100% 时最优（26.6MPa）。
[1] 杨娟, 朋改非, 税国双. 再生钢纤维增韧超高性能混凝土的力学性能[J]. 复合材料学报, 2019,36(8): 1949-1956.
[2] 万超. 再生陶瓷粗骨料混凝土基本力学性能与碳化试验研究[D]; 华侨大学,2009.
[3] 陆盛武, 曾志兴, 万超. 陶瓷粗骨料再生混凝土碳化后力学性能研究[J]. 混凝土,2014,(08):49-51+6.
[4] 邵莲芬, 张文忠. 陶瓷再生粗骨料混凝土力学性能与耐久性研究[J]. 新型建筑材料,2016,43(09):33- 35.
[5]Sivakumar, A., Srividhya, S., Sathiyamoorthy, V., Seenivasan, M., & Subbarayan, M. R. Impact of waste ceramic tiles as partial replacement of fine and coarse aggregate in concrete [J]. Materials Today: Proceedings, 2022, 61, 224-231.
[6]Zhang, L., Shen, H., Xu, K., Huang, W., Wang, Y., Chen, M., & Han, B. Effect of ceramic waste tile as a fine aggregate on the mechanical properties of low-carbon ultrahigh performance concrete [J].. Construction and Building Materials, 2023, 370, 130595.
[7]Zareei, S. A., Ameri, F., Bahrami, N., Shoaei, P., Musaeei, H. R., & Nurian, F. Green high strength concrete containing recycled waste ceramic aggregates and waste carpet fibers: Mechanical, durability, and microstructural properties [J]. Journal of Building Engineering, 2019, 26, 100914.
[8] 陈浩，刘敏，吴丹. 不同粒径再生陶瓷骨料对混凝土工作性及微观结构的影响 [J]. 混凝土，2022, (9): 34-38+43.
[9] 王芳，李刚，张宇. 陶瓷骨料粒径分布对再生混凝土界面过渡区的影响 [J]. 材料导报，2020, 34 (16): 16089-16093.
[10] 陈晓，马丽，董强. 再生陶瓷细骨料粒径对高强混凝土性能的调控作用 [J]. 建筑结构学报，2024, 45 (1): 123-130.
[11]Sagoe-Crentsil, K., Brown, A. A., & Taylor, P. C. Effect of ceramic aggregate particle size on the mechanical properties of concrete[J]. Construction and Building Materials, 2020, 245: 118432.
[12]El-Sayed, M., El-Dieb, A. S., & Mahmoud, M. A. Influence of fine ceramic aggregate particle size on workability and strength of normal concrete[J]. Journal of Materials in Civil Engineering, 2022, 34(8): 04022186.