Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/220521
Title: EXPERIMENTAL STUDY ON THE SHEAR BEHAVIOUR OF 3D PRINTED CONCRETE JOINTS
Authors: POH WEN JUN DESMOND
Keywords: Shear Key
3D Printing
Concrete
Joints
Degree of B.Sc. (Project and Facilities Management)
Building
PFM
Project and Facilities Management
2020/2021 PFM
Alexander Lin
Issue Date: 30-Dec-2020
Citation: POH WEN JUN DESMOND (2020-12-30). EXPERIMENTAL STUDY ON THE SHEAR BEHAVIOUR OF 3D PRINTED CONCRETE JOINTS. ScholarBank@NUS Repository.
Abstract: The current construction industry is bogged down by inefficiency and labour shortage. Concrete 3D printing has the potential to overcome these productivity and labour shortage problems and more through automation, reducing labour usage, reducing environmental footprint and reducing cost of construction. However, even though 3DPC is currently under substantial research and investigation, no study has been conducted to evaluate the shear behaviour of 3D printed concrete (3DPC) shear keys. Therefore, this paper aims to investigate the shear behaviour of 3DPC shear keys to set a foundation and precedent for future research in this field of study. Four specimens of two different shear key angles were fabricated to investigate the effect shear key angle has on the shear behaviour and mechanical performance of the specimen. The specimens were designed to ensure that other parameters that can affect the specimens were kept constant in all specimens. It was hypothesise that specimens with a smaller shear key angle will have a better shear behaviour and mechanical performance. Direct shear tests were conducted and the ultimate shear load, peak shear stress, crack development, and normalised peak shear stress were all analysed to evaluate the results. It was concluded that the specimens with a smaller shear key angle did have a higher ultimate shear load and peak shear stress. The results also showed that the normalised shear stress of 3DPC shear keys was only slightly lower than precast concrete shear keys. This showed that the challenges faced during this study was successfully curbed through proper and well-executed fabrication of the specimens, inclusion of wire mesh reinforcement, and the use of epoxy resin.
URI: https://scholarbank.nus.edu.sg/handle/10635/220521
Appears in Collections:Bachelor's Theses

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