Title:
Sustainable Polymer Modified Concrete for 3D Concrete Printing
Author(s):
Moneeb Genedy
Publication:
Web Session
Volume:
ws_S23_MoneebGenedy.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
4/2/2023
Abstract:
Additive manufacturing (i.e., 3D-printing) is potentially a sustainable construction technique due to improved accuracy, precision, quality, reduced waste, and the ability to print complex geometries. However, the common material used for 3D Concrete Printing (3DCP) contains high cement paste content to achieve the required properties for the printing process. In addition, the weak interlayer bond strength that occurs due to the nature of the process, especially in large scale 3D-printing as the delay time increases, is a major challenge. SBR latex has been proven to improve bond strength, toughness, durability and reduce shrinkage of polymer modified concrete (PMC) in addition to reducing its carbon footprint. In this investigation, a sustainable PMC mixture with superior properties is developed for 3D-printing applications. The effect of SBR latex content on the pumpability and buildability of concrete mix is investigated. The quality of the interlayer bond strength of 3D printed PMC with varied SBR latex content is evaluated based on tensile bond and shear bond strengths. The results show that incorporating SBR latex improved the buildability, interlayer bond strength, and overall performance of 3D printed concrete elements.