Key Technologies and Innovative Applications of 3D Concrete Printing

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Structures".

Deadline for manuscript submissions: 30 April 2025 | Viewed by 918

Special Issue Editors


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Guest Editor
Institute of Smart City and Intelligent Transportation, Southwest Jiaotong University, Chengdu 611756, China
Interests: 3D concrete printing; engineered cementitious composites; material optimization; fracture of concrete

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Guest Editor
School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Interests: strain-hardening cementitious composites; 3D printing concrete materials; recycled high performance concrete

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Guest Editor
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Interests: construction materials; structural retrofitting; intelligent construction

Special Issue Information

Dear Colleagues,

3D concrete printing has seen rapid advancements in recent years, driven by the benefits of automated process, formwork-free construction, reduced material wastage, and low labor cost. Researchers have made significant strides in developing printable materials, characterizing the fresh and hardened properties of printable materials, optimizing the printing process, exploring structural optimization techniques, etc. However, the extrusion-based layer-by-layer printing approach has presented several challenges that have hindered the practical application of 3D concrete printing. The challenges include high drying shrinkage due to the formwork-free process, difficulty in integrating steel reinforcement in printed structures, etc.

This Special Issue aims to address the latest challenges and explore the developments in key technologies and innovative applications of 3D concrete printing. Topics of interest include, but are not limited to, the following:

  • Development of printable materials;
  • Fresh and hardened properties;
  • Structural optimization in 3D concrete printing;
  • Mechanical performance of printed structures;
  • Shrinkage/durability/sustainability;
  • Numerical simulation of 3D concrete printing;
  • Reinforcement integration in 3D concrete printing.

We invite researchers working in these and related areas to submit their original research articles, review papers, and case studies for this Special Issue. Your contributions will help advance the state of the art in this rapidly evolving field and promote the wider adoption of 3D concrete printing technology.

Dr. Junhong Ye
Dr. Yichao Wang
Dr. Fangyuan Dong
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • 3D concrete printing
  • material optimization
  • structural optimization
  • shrinkage/durability/sustainability
  • structural performance
  • numerical simulation
  • reinforcement strategy

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Published Papers (1 paper)

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Research

14 pages, 10389 KiB  
Article
Effect of Active MgO on Compensated Drying Shrinkage and Mechanical Properties of Alkali-Activated Fly Ash–Slag Materials
by Hongqiang Ma, Shiru Li, Zelong Lei, Jialong Wu, Xinhua Yuan and Xiaoyan Niu
Buildings 2025, 15(2), 256; https://doi.org/10.3390/buildings15020256 - 16 Jan 2025
Viewed by 592
Abstract
The influences of MgO activity and its content on the mechanical properties, drying shrinkage compensation, pore structure, and microstructure of alkali-activated fly ash–slag materials were investigated. Active MgO effectively compensated for the alkali-activated materials’ (AAMs’) drying shrinkage. The drying shrinkage increased rapidly with [...] Read more.
The influences of MgO activity and its content on the mechanical properties, drying shrinkage compensation, pore structure, and microstructure of alkali-activated fly ash–slag materials were investigated. Active MgO effectively compensated for the alkali-activated materials’ (AAMs’) drying shrinkage. The drying shrinkage increased rapidly with the increase in curing age and stabilized after 28 d. Within a certain range, the material’s drying shrinkage was inversely proportional to the content of active MgO. The higher the activity of MgO, the lower the drying shrinkage of the AAMs under the same MgO content. The drying shrinkage values of the test groups with 9% R-MgO, M-MgO, and S-MgO at 90 d were 2444 με, 2306 με, and 2156 με, respectively. In the early stage of hydration, the addition of S-MgO reduced the compressive strength. As the content of M-MgO increased, the compressive strength first increased and then decreased, reaching a maximum of 72.28 MPa at an M-MgO content of 9%. The experimental group with 9% M-MgO exhibited higher compressive and flexural strengths than those with 9% S-MgO and R-MgO, demonstrating better mechanical properties. The results of this study provide an important theoretical basis and data support for the optimal application of MgO in AAMs. MgO expansion agents have great application potential in low-carbon buildings and durable materials. Further research on their adaptability in complex environments will promote their development for engineering and provide innovative support for green buildings. Full article
(This article belongs to the Special Issue Key Technologies and Innovative Applications of 3D Concrete Printing)
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