一种提高打印构件尺寸精度的3D打印混凝土及制备方法
By combining modified brick powder and steel slag powder, and incorporating sodium polyacrylate hydrogel as a grinding aid in the ball milling process, the problem of dimensional inconsistency in the forming and plastic hardening stages of concrete 3D printing was solved, improving the stability and precision of printed components, enhancing the water retention and interfacial strength of concrete, and improving printing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHEAST UNIV
- Filing Date
- 2024-04-23
- Publication Date
- 2026-07-17
AI Technical Summary
In the process of concrete 3D printing, there are dimensional inconsistencies in the printing and plastic hardening stages, which lead to technical problems. Existing technologies are unable to solve the differences in height, width, and surface roughness of printed components. Furthermore, the components shrink in high-temperature and low-humidity environments, affecting the dimensional accuracy and strength of the printed components.
A combination of modified brick powder and steel slag powder is used, and sodium polyacrylate hydrogel is uniformly incorporated as a grinding aid through ball milling to improve powder flowability and thixotropy, delay hydration reaction, enhance water retention and interfacial strength of concrete, and improve printing stability and accuracy when combined with appropriate printing parameters.
This improved the stability and precision of the concrete printing process, reduced drying shrinkage, decreased the error between actual and design dimensions, and enhanced the quality and strength of printed components.
Smart Images
Figure CN118388191B_ABST