Experimental investigations on the influence of nozzle travel speed and height on the mechanical properties of 3D printed concrete

SHI Qingxuan; WAN Shengmu; WANG Qiuwei; TAO Yi; HUO Jian

doi:10.13801/j.cnki.fhclxb.20220607.001

Volume 40 Issue 4

Apr. 2023

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Article Navigation > Acta Materiae Compositae Sinica > 2023 > 40(4): 2273-2284

SHI Qingxuan, WAN Shengmu, WANG Qiuwei, et al. Experimental investigations on the influence of nozzle travel speed and height on the mechanical properties of 3D printed concrete[J]. Acta Materiae Compositae Sinica, 2023, 40(4): 2273-2284. doi: 10.13801/j.cnki.fhclxb.20220607.001

Citation:

SHI Qingxuan, WAN Shengmu, WANG Qiuwei, et al. Experimental investigations on the influence of nozzle travel speed and height on the mechanical properties of 3D printed concrete[J]. Acta Materiae Compositae Sinica, 2023, 40(4): 2273-2284. doi: 10.13801/j.cnki.fhclxb.20220607.001

Citation:

SHI Qingxuan, WAN Shengmu, WANG Qiuwei, et al. Experimental investigations on the influence of nozzle travel speed and height on the mechanical properties of 3D printed concrete[J]. Acta Materiae Compositae Sinica, 2023, 40(4): 2273-2284. doi: 10.13801/j.cnki.fhclxb.20220607.001

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Experimental investigations on the influence of nozzle travel speed and height on the mechanical properties of 3D printed concrete

doi: 10.13801/j.cnki.fhclxb.20220607.001

SHI Qingxuan^{1, 2, 3
,
,},
WAN Shengmu²,
WANG Qiuwei^{1, 2, 3},
TAO Yi^{1, 2, 3},
HUO Jian²

1.
State Key Laboratory of Green Building in Western China, Xi'an University of Architecture & Technology, Xi'an 710055, China
2.
School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
3.
Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi'an University of Architecture & Technology, Xi'an 710055, China

Funds: National Natural Science Foundation of China (51878540; 52178505)

Received Date: 2022-04-25
Accepted Date: 2022-05-27
Rev Recd Date: 2022-05-19

Available Online: 2022-06-08

Publish Date: 2023-04-15

Abstract

Abstract

In order to study the influence of printed parameters such as nozzle travel speed and nozzle height on the mechanical properties of 3D printed concrete (3D PC), the same mix proportion of cast test blocks and printed test blocks with different printed parameters were prepared. Through concrete cubic compressive test, prismatic axial compressive test and cubic splitting tensile test, the failure process and failure mode were investigated, the influence of nozzle travel speed and nozzle height on the mechanical properties of 3D PC were analyzed, the axial compression stress-strain curve of 3D PC was obtained, and the relationships between the strengths of 3D PC were established. The results show that the cubic compressive strength, axial compressive strength and splitting tensile strength of 3D PC decrease with the acceleration of nozzle travel speed and the increase of nozzle height, and the adverse effect of nozzle height on strengths is stronger than that of nozzle travel speed. Under the optimal combination of printed parameters, the compressive strength of printed test block is higher than that of cast test block. However, due to the weak interlayer bonding surface of printed test block, the splitting section is at the interlayer interface, resulting in an obvious smooth section, and the splitting tensile strength is lower than that of cast test block. Through regression analysis, the functional relationships between the strengths of 3D PC and printed parameters, as well as the conversion relationships between axial compressive strength, splitting tensile strength and cubic compressive strength were established.
- 3D printed concrete,
- printed parameters,
- cubic compressive strength,
- axial compressive strength,
- splitting tensile strength
Long Abstrsct
Innovation Points

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References(26)

References

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