Master's Theses

Permanent URI for this communityhttps://hdl.handle.net/10679/9875

Browse

Browsing by Author "Ahi, Oğulcan"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • Placeholder
    Master ThesisPublicationMetadata only
    Flow rate control system utilizing rheological parameters for precise and consistent extrusion in 3D concrete printing
    Ahi, Oğulcan; Bebek, Özkan; Bebek, Özkan; Ertunç, Özgür; Akgül, Ç. M.; Department of Mechanical Engineering
    The use of inline quality assessment technologies is of great importance in meeting the consistent extrusion requirements of 3D concrete printing (3DCP) applications. The proposed study suggests a system for regulating the extrusion speed during 3DCP processes in order to maintain the extrusion flow rate at a targeted value. This system is based on a newly proposed equation that combines both printing parameters and the rheological properties of the material used in the printing process. The study presents a novel flow rate control method for 3DCP, leveraging a unique correlation between printing and rheological parameters, to address quality assessment strategies in the process. The control strategy that has been proposed is established to function effectively with different types of cement-based mixtures and has the capability to regulate the extrusion process, thereby ensuring the attainment of a targeted flow rate from the system. Validation tests demonstrate that the proposed flow rate control can maintain an instantaneous flow rate within a certain range and eventually achieve a constant flow rate. During operation, the flow rate is consistently maintained around the targeted value with an average error rate of 6.7 percent. The presented flow rate control mechanism exhibits promising potential as a reliable and efficient solution for achieving precise and constant flow rate values, regardless of the cement mix design employed.