Title:
Real-time Vibrorheological Control Strategies for 3D Printable Cement Mortar
Author(s):
Jae Hong Kim
Publication:
Web Session
Volume:
ws_S26_JaeHongKim.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/29/2026
Abstract:
This presentation introduces a comprehensive vibrorheological control strategy for 3D printable cement-based materials, addressing key challenges in construction automation through innovative additive manufacturing techniques. Our research demonstrates how strategic application and elimination of vibration can effectively control the thixotropic behavior of cement-based materials throughout the printing process. By quantifying this relationship in energy density terms, we establish that vibration intensity directly correlates with both material flowability during extrusion and accelerated thixotropic recovery upon vibration cessation. The experimental framework examines how vibration affects cement-based materials in two critical phases: during application to enhance workability and after elimination to accelerate shape stability. Through rheological analysis and printing experiments, we demonstrate that materials can transition effectively from high flowability states necessary for extrusion to rapidly increasing yield stress when vibration is removed. This approach successfully addresses critical technical challenges including weak interlayer bonding, reinforcement integration, and shape stability maintenance. Printing tests validate that materials subjected to controlled vibration parameters demonstrated improved surface quality and reinforcement integration while requiring significantly reduced waiting times to achieve shape stability. This unified vibrorheological control methodology represents a significant advancement in optimizing additive construction processes and expanding the practical applications of 3D concrete printing technology.