This study investigated the feasibility of using waste liquid crystal display (LCD) glass powder as a partial replacement for the silica flour that is typically used as a filler in ultra-high-performance concrete (UHPC). In this study, 50% of the silica flour was replaced with LCD glass powder, and its effects on the interfacial bond properties of two steel fiber shapes—circular and triangular—were evaluated. The test results indicated that the LCD glass powder effectively enhanced the bond between the steel fibers and the UHPC, which created a denser interfacial zone; this could be attributed to the filling effects of the LCD glass powder and secondary hydrates. The use of the LCD glass powder increased the pullout energy by 15–40% and the average bond strength by 16%, along with formation of additional scratches on the fiber surfaces. For the same matrix, as compared to the circular steel fibers, the triangular steel fibers yielded superior pullout resistance owing to their higher intrinsic fiber efficiency ratio. Thus, the highest average bond strength and pullout energy of 11.2 MPa and 744 mJ could be obtained from the UHPC mixture containing the LCD glass powder and triangular steel fibers.

这项研究调查了使用废旧的液晶显示器（LCD）玻璃粉作为硅粉的部分替代品的可行性，硅粉通常用作超高性能混凝土（UHPC）的填料。在这项研究中，用LCD玻璃粉代替了50％的硅粉，并评估了其对两种钢纤维形状（圆形和三角形）的界面粘结性能的影响。测试结果表明，LCD玻璃粉有效增强了钢纤维与UHPC之间的结合力，形成了致密的界面区域。这可能归因于LCD玻璃粉和二次水合物的填充效果。LCD玻璃粉的使用将拉拔能量提高了15-40％，平均粘结强度提高了16％，同时在纤维表面形成了更多的划痕。对于相同的基体，与圆形钢纤维相比，三角形钢纤维由于其较高的固有纤维效率比而具有出色的抗拔出性。因此，可以从包含LCD玻璃粉和三角钢纤维的UHPC混合物中获得11.2 MPa和744 mJ的最高平均粘结强度和拉拔能。