Effect of polyacrylamide on the workability and interlayer interface properties of 3D printed cementitious materials

• DOI: 10.1016/j.jmrt.2022.06.093
• Publication Date: 2022-06-23T16:25:31Z
• Authors: Qiang Yuan; Zonglin Xie; Hao Yao; Tingjie Huang; Zemin Li; Xinguo Zheng
• Keywords: Cementitious

Weak interlayer interface is a major drawback of three-dimensional (3D) printed cementitious materials technology. In this paper, the effect anionic polyacrylamide (APAM) with different dosages on workability, properties (i.e., durability, shear bond strength) and microstructure 3D cement mortar were studied. The relationship between workability regulated by APAM was analyzed. results showed that artifacts had good correlation fresh pastes. With increase content, plastic viscosity structural build-up rate paste improved. Meanwhile, defects increased, porosity became higher, hence resulting in decline durability strength. addition, introduction can improve cohesiveness layer stacking performance mortar.