Effect of Basalt Fiber on Interlayer Bonding Properties of 3D Printed Concrete

doi:10.16552/j.cnki.issn1001-1625.2024.1280

Abstract

Abstract: In this paper, the interlayer bonding properties of 3D printed concrete with basalt fiber were studied. The 3D printed concrete specimens with basalt fiber content of 0%, 0.3%, 0.6%, 0.9%, 1.2% and 1.5% (mass fraction) were designed and printed, respectively. The effects of basalt fiber on the macroscopic interlayer bonding properties of 3D printed concrete were analyzed by rheological properties, interlayer tensile and interlayer shear tests. The microstructure of 3D printed concrete with basalt fiber was analyzed by SEM and BET, and the influence of microstructure on the macroscopic interlayer bonding properties was discussed. The results show that compared with 3D printed concrete without basalt fiber, the rheological properties, interlayer tensile strength and interlayer shear strength of 3D printed concrete with basalt fiber are improved. The basalt fiber can bridge cracks in cement paste and inhibit the expansion of microcracks in the interface area. However, the high content of basalt fiber will lead to the increase of porosity of 3D printed concrete, thus reducing the interlayer bonding property. When the content of basalt fiber is 0.6%, the interlayer bonding property of 3D printed concrete is significantly improved, and its interlayer tensile strength and interlayer shear strength reach 3.51 MPa and 6.26 MPa, respectively.

Key words: basalt fiber, 3D printed concrete, fiber content, interlayer bonding property, microstructure

CLC Number:

TU528

PEI Qiang, YANG Yuhang, ZHONG Yingzhu, QI Pengfei, ZHANG Luxi. Effect of Basalt Fiber on Interlayer Bonding Properties of 3D Printed Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2465-2473.

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