氧化铁红颜料对白水泥基3D打印材料流变及可打印性能的影响

目前3D打印技术在建筑材料领域的研究主要集中在大型结构的建立和力学性能上,而对异形装饰及景观构件的研究还很少。本文采用白色硅酸盐水泥作为胶凝材料,并引入亚微米级粒度氧化铁红颜料来制备彩色水泥基3D打印材料,并研究氧化铁红颜料对白水泥基3D打印材料流变性能、可打印性能及力学性能的影响。结果表明,低掺量的颜料可以降低白水泥基3D打印浆体的动态流变性能,改善浆体的挤出性能。此外,颜料的掺入能够明显提高浆体的静态屈服应力,使得结构变形率从11.38%降低至4.03%。同时,颜料的掺入能够改善浆体的早期力学性能,其3 d抗压和抗折强度最高可达到48.56 MPa和5.07 MPa。总的来说,氧化铁红颜料可调控白水泥基3D打印材料流变性能和优化材料微观结构。

Effect of Iron Oxide Red Pigment on Rheological Property and Printability of 3D Printed White Portland Cement-Based Materials

Recently, most of the research on 3D printing technology in the field of architectural decoration focuses on the rheological property of materials and the mechanical properties of materials, while the study of its decorative effect is still few. In this paper, iron oxide red pigment was introduced into 3D printed white Portland cement-based materials for dyeing. The effects of iron oxide red pigment on the rheological property, printability, and mechanical property on 3D printed white Portland cement-based materials were studied. The experimental results show that the low pigment content can reduce the dynamic rheological property of the 3D printed white Portland cement-based materials and improve the extrusion performance of the paste, while the high pigment content is not conducive to the extrusion of the paste. Besides, the addition of iron oxide red pigment can significantly increase the static yield stress of the paste and reduce the structural deformation rate from 11.38% to 4.03%. At the same time, the addition of iron oxide red pigment can improve the early mechanical properties of the paste, and the 3 d maximum compressive strength and flexural strength of the paste can reach 48.56 MPa and 5.07 MPa, respectively. In general, the introduction of iron oxide red pigment can improve the deformation rate of paste through the regulation of rheological properties.