Effect of Polymers on Performance of Underwater 3D Printing Building Mortar

The effects of latex powder（FX），cellulose ether（HM）and starch ether（KH）on rheological properties，working properties，anti‑dispersant properties and mechanical properties of underwater 3D printing building mortar （3DP‑BM）were studied. The results show that 3DP‑BM cannot be printed underwater without FX or HM，or with too much KH. Mixed with FX，HM and KH together，3DP‑BM has good working performance，appropriate mechanical strength and underwater anti‑dispersion performance. When the content of FX，HM and KH is 0.500%，0.100% and 0.025% respectively，3DP‑BM has suitable operational time，good underwater anti‑dispersion property，and high underwater strength and underwater stacking height. © 2023 Tongji University. All rights reserved.