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• W4380148557 endingPage "107077" @default.
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• W4380148557 abstract "This paper aims to improve the tensile strength, tensile ductility, and bending toughness of a recently developed ‘one-part’ geopolymer for 3D concrete printing (3DCP) applications, in order to address the insufficient tensile strength and brittle fracture characteristics of geopolymer materials in 3D printing scenarios where materials are subjected to tensile stress. The effects of steel fiber content, and aspect ratio, on mechanical properties, were systematically discussed, including compressive strength, flexure strength, splitting tensile strength, uniaxial tensile strength, bending toughness, and the anisotropy of 3D printing ‘one-part'geopolymer fiber reinforcement concrete(3DP-OPGFRC), respectively. The fiber distribution in the printed samples was obtained through x-ray computed tomography (X-CT) testing. In addition, the underlying mechanisms were discussed to provide a deep understanding of the role steel fiber played in the reinforcement. The experimental results showed that the flexural strength increased by 282% to 26.1 MP, and the compressive strength also reached 104.5Mpa. A high tensile ductility, appreciable bending toughness, and strain-hardening behavior can be achieved with steel fiber incorporation. In addition, it has an advantage over the OPC-based steel fiber-reinforced 3D printing materials given in the existing literature (flexural strength 15 Mpa); It is also superior to the tensile strength (<6Mpa) of current geopolymer fiber reinforcements used for 3D printing. It is expected that the development of this 3D printable, steel fiber-reinforced one-part geopolymer material will meet the requirement for high tensile strength in 3D printing applications." @default.
• W4380148557 created "2023-06-11" @default.
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• W4380148557 date "2023-09-01" @default.
• W4380148557 modified "2023-09-27" @default.
• W4380148557 title "Improving mechanical properties of 3D printable ‘one-part’ geopolymer concrete with steel fiber reinforcement" @default.
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• W4380148557 doi "https://doi.org/10.1016/j.jobe.2023.107077" @default.
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