Thermal and Sound Insulation of Large-Scale 3D Extrusion Printing Wall Panel Lapyote Prasittisopin (&) , Kittisak Pongpaisanseree, Patiphat Jiramarootapong, and Chalermwut Snguanyat SCG Cement Co. Ltd., Bangkok, Thailand lapyotep@scg.com Abstract. A 3D printing technology for construction has been developed for some decades. This technology presents a great potential applying into existing construction and is believe to encourage a sustainable construction. This is because of its perceptible benefits of free-form fabrication without formwork, enhanced product quality, minimized waste produced, and reduced labor workforce. The technology also presents consequential automated advance- ments and is poised to be a disruptive force in the evolving global construction industry. Presently, it is found that many cementitious materials have been developed to have the fresh characteristics suitably for a large-scale extrusion 3D printer. Previous research reported that a large-scale 3D-printed wall panel with the size larger than 1-m by 1-m exhibited better thermal and sound insu- lating performance characteristics, when compared to a traditional concrete wall panel. These better performance characteristics were indicated when using a high-strength 3D extrusion printing wall panels with the 28-day compressive strength value greater than 50 MPa. The large-scale 3D extrusion printing wall panels having normal 28-day compressive strengths of 25 MPa and 35 MPa should be assessed. This work aims to present results on investigating its thermal and sound insulating performance of the 3D extrusion printing wall panels with mortar having different compressive strengths. Three mortar types having various 28-day compressive strengths are developed and printed into the wall panel with different surface textures using the large-scale 3D extrusion printer. The printed wall panels are investigated on their benefits for thermal and sound insulating performance. In additional, other hardened performance char- acteristics of mortars developed herein such as density, porosity, flexural strength, drying shrinkage, and thermal conductivity of the mortar materials are evaluated. Keywords: 3D extrusion printing Á Thermal insulation Á Sound insulation Á Wall panel 1 Introduction Additive manufacturing technology by cement extrusion also called as “3D extrusion printing” has been widely investigated for the future opportunity for disrupting existing construction techniques. Many opportunities and challenges of this technology are still present [1–10]. There have been many studies to develop the suitable material © RILEM 2020 F. P. Bos et al. (Eds.): DC 2020, RILEM Bookseries 28, pp. 1174–1182, 2020. https://doi.org/10.1007/978-3-030-49916-7_111