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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (6): 1821-1831.

• 3D Printing Cement-Based Materials • Previous Articles     Next Articles

Influencing Factors and Testing Methods of Printability of 3D Printing Concrete Materials

JIAO Zekun1, WANG Dongmin1, WANG Qibao1, HUANG Tianyong2, WANG Jixiang2, LI Linkun2   

  1. 1. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
    2. State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing Building Materials Academy of Science Research,Beijing 100041, China
  • Received:2021-03-24 Revised:2021-05-26 Online:2021-06-15 Published:2021-07-08

Abstract: Concrete 3D printing is a new and high technology developed in recent years, which has attracted extensive attention and achieved many research results. However, there is no unified understanding of the testing method of material properties at present. In this paper, the research progress of 3D printing concrete was reviewed for five aspects: fluidity, setting time, rheological properties, extrudability and buildability. Fluidity test is used to quickly screen out material not suitable for printing. In the long run, materials with short setting time have more potential. The rheological properties of materials are quantitatively analyzed, but the evolution of static yield stress with time is lacking in research. At present, the extrudability is still judged by observation method and quantified by voidage. Due to different collapse modes, buildability should be evaluated by combining the number of printed layers with the deformation of specimens. The printability testing methods in recent years were summarized, their advantages and disadvantages were analyzed. And this paper provides some suggestions for the quantification and evaluation of printability for researchers to use for reference.

Key words: 3D printing concrete, 3D printing mortar, rheological property, extrudability, buildability

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