3D-printed concrete shear keys: Design and experimental study

Hua, Tianran; Lin, Alexander; Poh, Wen Jun Desmond; Charlene,; Wong, De Hui Alwin; Zhang, Hong; Chan, Yao Zheng; Liu, Wenhui; Zhao, Liang

doi:10.1016/j.dibe.2023.100180

Developments in the Built Environment

2023

DOI: 10.1016/j.dibe.2023.100180

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3D-printed concrete shear keys: Design and experimental study

Tianran Hua,

Alexander Lin,

Wen Jun Desmond Poh

et al.

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Cited by 3 publications

References 32 publications

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Studies on the Mechanical Properties of Interlayer Interlocking 3D Printed Concrete Based on a Novel Nozzle

Jiang,

Gao,

Adhikari

et al. 2024

Case Studies in Construction Materials

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Studies on the Mechanical Properties of Interlayer Interlocking 3D Printed Concrete Based on a Novel Nozzle

Jiang,

Gao,

Adhikari

et al. 2024

Case Studies in Construction Materials

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Utilizing Industrial By-Products for Sustainable Three-Dimensional-Printed Infrastructure Applications: A Comprehensive Review

Kurniati,

Kim

2023

Infrastructures

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Industrial secondary products (e.g., fly ash, blast furnace slag, and silica fume) have found extensive application as alternative construction materials in conventional manufacturing methods to reduce carbon emissions due to cement usage and solve the waste management problem. To date, additive manufacturing or 3D printing has been massively developed for every material, including cement-based materials. Some possibilities have arisen to incorporate industrial wastes in cement mixtures in 3D printing applications. However, a comprehensive study about fly ash (FA), ground granulated blast-furnace slag (GGBFS), and silica fume (SF) usage in 3D-printed materials needs to be conducted. This paper shows that some aspects of 3D printing, such as printability, buildability, and rheological properties, need to be considered, and waste materials affect these fresh mixture properties. Applying waste materials as supplementary cementitious materials also gives different mechanical properties and durability performances. Furthermore, the environmental and economic benefits of 3D-printed and conventional materials are compared. The results show that 3D printing methods can enhance the environmental and economic benefits while maintaining the performance of materials created using traditional methods. Studying industrial waste application in 3D printing has become a promising way to develop sustainable materials in this digitalization era.

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Exploring Fresh and Hardened Properties of Sustainable 3D-Printed Lightweight Cementitious Mixtures

Sedghi,

Zafar,

Hojati

2023

Sustainability

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This study investigates using lightweight concrete in 3D printing to reduce transportation costs and maintain structural strength. Normal-weight river (RS) sand was replaced with pumice and expanded glass at 50% and 100% volumes to decrease the material density. This substitution reduced the weight of various mixes up to 25.1%, with apparent porosity ranging from 11.37% to 27.9%. This study found that aggregate characteristics, including the shape, size, and absorption capacity, influenced printability. Rounded aggregates like expanded glass flowed better and required less water than irregular pumice. Lightweight aggregates had finer textures and higher porosity, needing more water. According to the extrudability results, the best print quality was achieved using 100% expanded glass, incorporating methylcellulose (MC) and polyethylene (PE) fibers. Moreover, the buildability outcomes highlighted a reliance on the printing speed and the water-to-binder (W/B) ratio. Comparing cast and 3D printed specimens, cast concrete reached a maximum compressive strength of 65.6 MPa, while 3D printed concrete achieved a maximum strength of 43.4 MPa. RS had the highest strength (65.6 MPa), while expanded glass showed the lowest (17.5 MPa) in both cast and 3D printed specimens. Adding PE and MC enhanced the print quality and increased the compressive strength due to the fibers’ bridging capacity.

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3D-printed concrete shear keys: Design and experimental study

Cited by 3 publications

References 32 publications

Studies on the Mechanical Properties of Interlayer Interlocking 3D Printed Concrete Based on a Novel Nozzle

Studies on the Mechanical Properties of Interlayer Interlocking 3D Printed Concrete Based on a Novel Nozzle

Utilizing Industrial By-Products for Sustainable Three-Dimensional-Printed Infrastructure Applications: A Comprehensive Review

Exploring Fresh and Hardened Properties of Sustainable 3D-Printed Lightweight Cementitious Mixtures

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