3D-printable quaternary cementitious materials towards sustainable development: Mixture design and mechanical properties

Results in Engineering

卷:13

Zhanzhao Li¹  Shadi Nazarian²  Mehrzad Zahabi³  Ali M. Memari⁴  Keunhyoung Park⁴  Maryam Hojati⁵  José P. Duarte⁶  Aleksandra Radlińska⁷ 

[1] Corresponding author.;

[2] Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA;

[3] Department of Civil &

[4] Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA, 16802, USA;

[5] Department of Civil, Construction, and Environmental Engineering, University of New Mexico, NM, 87131, USA;

[6] McNamara Salvia Structural Engineers, Boston, MA, 02110, USA;

[7] Stuckeman School of Architecture and Landscape Architecture, Pennsylvania State University, University Park, PA, 16802, USA;

关键词: 3D-printing;    Cementitious materials;    Mixture design;    Quaternary blends;    Mechanical properties;   

DOI  :  

来源: DOAJ

【 摘 要 】

Development of 3D-printing technologies for cementitious materials becomes one of the driving forces to accelerate innovation in modern construction. The use of mineral and chemical admixtures in concrete has been found to benefit fresh and hardened properties and reduce the carbon footprint of portland cement. Towards this aim, four different supplementary cementitious materials, including metakaolin, silica fume, blast furnace slag, and sodium metasilicate, were utilized in binary, ternary, and quaternary cementitious blends. Flowability, setting, and compressive strength were measured to investigate the effects of different admixtures and their combinations on materials properties of printable mixtures. Selected mixtures were 3D-printed into cylinder specimens to assess their printing quality. The optimal mixture with up to 32.5% cement replacement was 3D-printed to evaluate mechanical properties (i.e., compressive strength and elastic modulus) based on prism specimens. The anisotropic behavior under compression load was observed. 3D-printed specimens tested under perpendicular direction showed the lowest compressive strength but the highest elastic modulus.

【 授权许可】

Unknown