Effect of Mineral Admixtures and Chemical Admixtures on Performance of 3D Printing Mortar

被引：0
|
作者：
Yang Q. [1 ]
Zhao Z. [1 ]
Xiao J. [2 ]
Li J. [3 ]
机构：
[1] School of Materials Science and Engineering, Tongji University, Shanghai
[2] School of Civil Engineering, Tongji University, Shanghai
[3] School of Mechanical Engineering, Tongji University, Shanghai
来源：
| 1600年 / Tongji University卷 / 24期
关键词：
3D printing mortar; Chemical admixture; Mineral admixture; Printability; Rheological property;
D O I：
10.3969/j.issn.1007-9629.2021.02.026
中图分类号：
学科分类号：
摘要：
The effect of mineral admixtures and chemical admixtures on the rheological behavior, setting time and printability of 3D printing mortar was studied. The results show that the addition of blast furnace slag and silica fume can significantly improve the rheological properties, prolong the operating time and printability of 3D printing mortar. With the increase amount of water reducing admixture, the viscosity, yield stress and thixotropy of 3D printing mortar are reduced, and the setting time is prolonged. However, too low dosage or too high dosage of the water reducing admixture will adversely affect the printability of 3D printing mortar. By adding appropriate retarder the viscosity and yield stress of 3D printing mortar can be reduced and its extrudability can be improved. With the increased dosage of gypsum, the apparent viscosity, yield stress, thixotropy and effective printing height of 3D printing mortar first decrease and later increase while the performance of extrudability shows the opposite. © 2021, Editorial Department of Journal of Building Materials. All right reserved.
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页码：412 / 418
页数：6
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