Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (5): 1245-1259.doi: 10.16285/j.rsm.2022.0824

• Fundamental Theroy and Experimental Research •     Next Articles

Basic mix ratio test and corresponding quality evaluation for cement-based 3D printing materials

JIANG Quan1, WU Si1, 2, LIU Qiang3, XIN Jie1, 2, ZHENG Hong1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. School of Civil Construction, Nanchang University, Nanchang, Jiangxi 330031, China
  • Received:2022-05-31 Accepted:2022-08-17 Online:2023-05-09 Published:2023-04-29
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (U1965205, 51879261)。

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Abstract: Cement-based 3D printing technology is increasingly popularized in civil construction and rock-like physical simulation, yet its cement-based 3D printing materials not only is limited by the challenges in quality control such as liquidity, shrinkage, and processability, but also is lack in basic formula in concrete material. This paper firstly establishes a set of assessing system based on six indexes and corresponding quality classification method considering the whole process of solid model forming for cement-based 3D printing, including fluidity, extrusion, setting time, buildability, compactness and deformation rate. The quality evaluation of the 3D printing solid model is realized in three aspects: printing process, stacking process, and solid accuracy. Then, through the two-stage orthogonal design and printing test with different threshold ranges, the basic mix ratio of cement-based 3D printing materials, which is ideal in comprehensive printing performance, is obtained. Finally, the uniaxial compression test is carried out for the printed cement-based 3D solid model and its rock-like mechanical properties are evaluated, which can provide a new type of rock-like cement-based 3D printing material. The specific mix ratios lay the foundation for the civil construction and physical simulation test of rock engineering based on cement-based materials.

Key words: cement materials, three dimensional print, physical simulation, quality evaluation, similar materials

CLC Number: 

  • TU 452
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