Yield stress and thixotropy control of 3D-printed calcium sulfoaluminate cement composites with metakaolin related to structural build-up

被引：160
作者：
Chen, Mingxu [1 ,2 ]
Yang, Lei [1 ,2 ]
Zheng, Yan [1 ]
Huang, Yongbo [1 ]
Li, Laibo [1 ]
Zhao, Piqi [2 ]
Wang, Shoude [2 ]
Lu, Lingchao [1 ,2 ]
Cheng, Xin [2 ]
机构：
[1] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China
[2] Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 252卷
关键词：
Rheology; Structure deformation; CSA cement; Metakaolin; 3D printing; 3D PRINTING CONCRETE; FLY-ASH MIXTURES; RHEOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; FRESH PROPERTIES; GEOPOLYMER; EXTRUSION; ADMIXTURES; BEHAVIOR; DESIGN;
D O I：
10.1016/j.conbuildmat.2020.119090
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The three-dimensional (3D) structural build-up with the precision has proposed new requirements related to yield stress and thixotropy in the 3D-printed cementitious materials. In this study, the static and dynamic yielding behaviours of 3D-printed calcium sulfoaluminate (CSA) cement composites with metakaolin were studied to understand the relationship between thixotropy and structural build-up through the powder-based extrusion system. Experimental results show that the static yield stress implemented by the constant shear-rate-controlled protocol in the 3D-printed CSA cement paste increased significantly with rest time. Dynamic rheological behaviours were investigated by the Bingham and Herschel-Bulkley model. Given the change of flocculation structure and shear-thinning behaviour during the shear period, Herschel-Bulkley model is more suitable for studying the dynamic rheological properties of 3D-printed CSA cement paste. Moreover, the thixotropy can be well improved by the addition of metakaolin, and the correlation between the structure deformation and thixotropy of 3D-printed CSA cement paste further proved that the improved thixotropy is beneficial to 3D-printed structural build-up. In conclusion, developing a 3D-printed CSA cement composites with the controllable yield stress and thixotropy is significant for structural build-up in the 3D-printed construction materials. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：10
相关论文
共 46 条
[1]   Insights into material design, extrusion rheology, and properties of 3D-printable alkali-activated fly ash-based binders [J].
Alghamdi, Hussam ;
Nair, Sooraj A. O. ;
Neithalath, Narayanan .
MATERIALS & DESIGN, 2019, 167
[2]   3D printing using concrete extrusion: A roadmap for research [J].
Buswell, R. A. ;
de Silva, W. R. Leal ;
Jones, S. Z. ;
Dirrenberger, J. .
CEMENT AND CONCRETE RESEARCH, 2018, 112 :37-49
[3]   Rheological parameters, thixotropy and creep of 3D-printed calcium sulfoaluminate cement composites modified by bentonite [J].
Chen, Mingxu ;
Liu, Bo ;
Li, Laibo ;
Cao, Lidong ;
Huang, Yongbo ;
Wang, Shoude ;
Zhao, Piqi ;
Lu, Lingchao ;
Cheng, Xin .
COMPOSITES PART B-ENGINEERING, 2020, 186 (186)
[4]   Rheological parameters and building time of 3D printing sulphoaluminate cement paste modified by retarder and diatomite [J].
Chen, Mingxu ;
Li, Laibo ;
Wang, Jiaao ;
Huang, Yongbo ;
Wang, Shoude ;
Zhao, Piqi ;
Lu, Lingchao ;
Cheng, Xin .
CONSTRUCTION AND BUILDING MATERIALS, 2020, 234
[5]   Effect of Tartaric Acid on the Printable, Rheological and Mechanical Properties of 3D Printing Sulphoaluminate Cement Paste [J].
Chen, Mingxu ;
Guo, Xiangyang ;
Zheng, Yan ;
Li, Laibo ;
Yan, Zhen ;
Zhao, Piqi ;
Lu, Lingchao ;
Cheng, Xin .
MATERIALS, 2018, 11 (12)
[6]   Rheological and mechanical properties of admixtures modified 3D printing sulphoaluminate cementitious materials [J].
Chen, Mingxu ;
Li, Laibo ;
Zheng, Yan ;
Zhao, Piqi ;
Lu, Lingchao ;
Cheng, Xin .
CONSTRUCTION AND BUILDING MATERIALS, 2018, 189 :601-611
[7]   Rheology of CAC-based cement pastes and the relationship to penetrability through nonwoven fabric reinforcements [J].
Claramunt, J. ;
Ventura, H. ;
Ardanuy, M. .
CEMENT & CONCRETE COMPOSITES, 2018, 94 :85-93
[8]   Vision of 3D printing with concrete - Technical, economic and environmental potentials [J].
De Schutter, Geert ;
Lesage, Karel ;
Mechtcherine, Viktor ;
Nerella, Venkatesh Naidu ;
Habert, Guillaume ;
Agusti-Juan, Isolda .
CEMENT AND CONCRETE RESEARCH, 2018, 112 :25-36
[9]   A novel method to enhance the interlayer bonding of 3D printing concrete: An experimental and computational investigation [J].
Hosseini, Ehsan ;
Zakertabrizi, Mohammad ;
Korayem, Asghar Habibnejad ;
Xu, Guanzhong .
CEMENT & CONCRETE COMPOSITES, 2019, 99 :112-119
[10]   3D concrete printing: A lower bound analytical model for buildability performance quantification [J].
Kruger, Jacques ;
Zeranka, Stephan ;
van Ziji, Gideon .
AUTOMATION IN CONSTRUCTION, 2019, 106
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