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3D Printing and Low-Carbon Technologies in Cementitious Composites
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3D Printing and Low-Carbon Technologies in Cementitious Composites

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 2520

Special Issue Editors

Dr. Yanping Zhu

E-Mail Website
Guest Editor
Civil and Mechanical Engineering, University of Mount Union, Alliance, OH, USA
Interests: ultrahigh-performance concrete; fiber-optic sensor
Special Issues, Collections and Topics in MDPI journals
Dr. Jingjie Wei

E-Mail Website
Guest Editor
Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, USA
Interests: fiber reinforced concrete; Mechanical properties; microstructure analysis; nanomaterials reinfored cement; green cement; rheological performance; 3D printed concrete; cracking contol; shrinkage mitigation

Special Issue Information

Dear Colleagues,

The construction of our civil infrastructure is heavily dependent on cementitious materials, and their continuous development has revolutionized structural design and optimization. The high strength, toughness, and durability of concrete are desirable to develop sustainable and resilient buildings, bridges, and tunnels. Any component changes in cementitious composites may result in changes in the mechanical properties and performance of concrete structures. As such, developing environmentally friendly concrete materials is feasible and necessary to reduce energy consumption and current global CO2 emissions, as well as to slow down climate change. In the meantime, the development of digital construction technology provides new opportunities to reduce the time of labor-intensive construction work as well as to enhance construction quality and update construction philosophy. In this Special Issue, we welcome papers on the recent development of 3D printing and low-carbon concrete technologies from a material to structural level.

Dr. Yanping Zhu
Dr. Jingjie Wei
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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 monthly 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

  • concrete construction
  • 3D printing technology
  • low-carbon technology
  • fire performance
  • alkali–silica reaction
  • corrosion
  • spectroscopic technology

Published Papers (3 papers)

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Research

16 pages, 4295 KiB  
Article
Microstructure and Phase Characterization of Alkali-Activated Slag–Fly Ash Materials with Tetrasodium of 1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid (HEDP·4Na)
by Bo Zhou, Mingyang Zhang, Jiaqing Zhang and Jingjie Wei
Buildings 2024, 14(5), 1383; https://doi.org/10.3390/buildings14051383 - 12 May 2024
Viewed by 416
Abstract
The effect of tetrasodium of 1-hydroxy ethylidene-1, 1-diphosphonic acid (HEDP·4Na) on the microstructure and phase characterization of alkali-activated fly ash–slag (AAFS) materials is not clear or well documented. In this study, XRD, DTG, TAM-air, and SEM analyses of AAFS were used to identify [...] Read more.
The effect of tetrasodium of 1-hydroxy ethylidene-1, 1-diphosphonic acid (HEDP·4Na) on the microstructure and phase characterization of alkali-activated fly ash–slag (AAFS) materials is not clear or well documented. In this study, XRD, DTG, TAM-air, and SEM analyses of AAFS were used to identify the microstructural changes in AAFS made with HEDP·4Na. Meanwhile, the workability and compressive strength of AAFS were evaluated. The results demonstrated that the early-age alkaline-activated reactions were retarded due to the addition of HEDP·4Na in the AAFS mixture. However, the degree of gel formation was relatively increased at a later age in the AAFS made with HEDP·4Na compared to the plain AAFS mixture. Additionally, in comparison to the control group, the incorporation of HEDP·4Na in AAFS specimens resulted in improved flowability, with increments of 5%, 15%, and 24% for concentrations of 0.1%, 0.2%, and 0.3%, respectively. The initial and final setting times were prolonged by 5% to 50%, indicating a beneficial impact on the rheological properties of the AAFS fresh mixture. Furthermore, the addition of HEDP·4Na led to an improvement in compressive strength in the AAFS mixtures, with enhancements ranging from 13% to 16% at 28 days compared to the control group. With the presence of HEDP·4Na, the increase in the degree of reactions shifted to the formation of gel phases, like C-S-H, through the combined measurement of TGA, XRD, and SEM, resulting in a denser microstructure in the AAFS matrix. This study presents novel insights into the intricate compatibility between the properties of AAFS mixtures and HEDP·4Na, facilitating a more profound comprehension of the potential improvements in the sustainable development of AAFS systems. Full article
(This article belongs to the Special Issue 3D Printing and Low-Carbon Technologies in Cementitious Composites)
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14 pages, 37513 KiB  
Article
First Impressions on Three-Dimensional Printing with Earth-Based Mortar at the Faculty of Engineering of the University of Porto
by Márcio Buson, Humberto Varum and Marco Antônio Rezende
Buildings 2024, 14(2), 312; https://doi.org/10.3390/buildings14020312 - 23 Jan 2024
Cited by 1 | Viewed by 685
Abstract
Three-dimensional (3D) printing with earth-based mortar is still under development and faces challenges. Optimising the mortar mixture, improving structural strength, determining the relationship between the printing speed and the amount of extruded material, and ensuring long-term durability are areas that are being refined. [...] Read more.
Three-dimensional (3D) printing with earth-based mortar is still under development and faces challenges. Optimising the mortar mixture, improving structural strength, determining the relationship between the printing speed and the amount of extruded material, and ensuring long-term durability are areas that are being refined. Additionally, regulatory and certification issues must also be considered to ensure the safety and compliance of 3D printed structures. This paper presents for discussion the records, analyses, studies, and considerations regarding initial initiatives involving 3D printing with the extrusion of earth-based mortar developed at the Faculty of Engineering of the University of Porto (FEUP). Through this work, it was possible to strengthen and reaffirm that 3D printing with earth-based mortar has significant potential in the construction industry and that the incorporation of dispersed kraft paper fibres from the recycling of cement bags is an excellent resource to achieve good constructability in 3D printing with earth-based mortar. Full article
(This article belongs to the Special Issue 3D Printing and Low-Carbon Technologies in Cementitious Composites)
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14 pages, 3901 KiB  
Article
Microstructure and Mechanical Properties of Cost-Efficient 3D Printed Concrete Reinforced with Polypropylene Fibers
by Dragoș Ungureanu, Cătălin Onuțu, Nicolae Țăranu, Nicoleta Vornicu, Ștefan Vladimir Zghibarcea, Dan Alexandru Ghiga and Ionuț Alexandru Spiridon
Buildings 2023, 13(11), 2813; https://doi.org/10.3390/buildings13112813 - 9 Nov 2023
Viewed by 1006
Abstract
Studying emerging and cutting-edge digital construction techniques, especially the utilization of 3D printing for concrete/mortar materials, holds significant importance due to the potential benefits that these technologies might offer over the traditional approach of casting concrete in place. In this study, a mixture [...] Read more.
Studying emerging and cutting-edge digital construction techniques, especially the utilization of 3D printing for concrete/mortar materials, holds significant importance due to the potential benefits that these technologies might offer over the traditional approach of casting concrete in place. In this study, a mixture composed of Portland cement, water, sand, limestone filler and polypropylene fibers was utilized for 3D printed concrete production towards the sustainable constructions approach. The benefits that sustain this statement include reduced construction time and material requirements, diminished error and cost, increase in construction safety, flexibility of architectural design, and improved quality with much less construction cost and waste. The microstructure, fresh and hardened mechanical properties of the polypropylene fiber reinforced 3D concrete were investigated. The results indicated that it is essential to attain a slump measurement of approximately 40 mm and a slump flow within the range of 140 to 160 mm, as stipulated by relevant standards (ASTM C1437 and C230/C230 M), in order to create a 3D concrete mixture suitable for extrusion. Also, the effects of printing parameters, fiber dosage, material composition, and other factors on the 3D printed concrete strength were discussed, and the corresponding adjustments were addressed. Full article
(This article belongs to the Special Issue 3D Printing and Low-Carbon Technologies in Cementitious Composites)
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