Effect of FA and GGBFS on compressive strength, rheology, and printing properties of cement-based 3D printing material

Xu, Zhen‐Jiang; Zhang, Dawang; Li, Hui; Sun, Xue-Mei; Zhao, Kefei; Wang, Yueying

doi:10.1016/j.conbuildmat.2022.127685

Cited by 38 publications

(5 citation statements)

References 31 publications

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“…This is due to the addition of SAP and HFA, which can both lead to an increase in flexural strength. In comparison with this finding, Xu's [38] mixtures of 3D printed concrete with used fly ash, without SAP addition, achieved a flexural strength decrease. He found out that as the FA concentration increases the strength rapidly diminishes.…”

Section: Flexural Strengthmentioning

confidence: 64%

Study of the Interaction of Cement-Based Materials for 3D Printing with Fly Ash and Superabsorbent Polymers

et al. 2022

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The use of superabsorbent polymers (SAP) in construction is a relatively new trend, and not a completely explored area. However, SAP itself has been on the market for over 80 years. SAPs have a cross-linked three-dimensional structure, thanks to which they have the unique ability to absorb extreme amounts of water, up to a hundred times their weight. By using this property, it is possible to prevent water losses, which is important at the time of maturation in cementitious building materials. When there is a lack of water needed for hydration processes, the physical and mechanical properties deteriorate. The subject of this article is to determine the possible positive effect of the presence of SAP in the cement matrix in order to optimize the parameters of silicate composites for 3D printing. For this purpose, a special methodology was compiled consisting of tests through which it is possible to assess the suitability of the tested mixtures for 3D printing. This methodology consists of determining consistency, volumetric weight, ultrasonic analysis, buildability, X-ray diffraction, flexural tensile and compressive strength. For determining of buildability and ultrasonic analysis new methodologies were created in this research in order to be suitable for the 3D printing materials. Last but not least, efforts are also being made to increase the incorporation of secondary raw material (fly ash) in order to reduce the environmental impact of industrial production and, conversely, to increase its sustainability while maintaining or improving the mechanical–physical parameters of building materials. From the results presented in this paper it is apparent, that created methodology is efficient for determining properties of 3D printable mixtures. SAPs also significantly influenced properties of these mixtures. Mainly buildability and flexural tensile strength (by up to 30%) were increased and volumetric weight was decreased (by up to 5%).

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Section: Flexural Strengthmentioning

confidence: 64%

Study of the Interaction of Cement-Based Materials for 3D Printing with Fly Ash and Superabsorbent Polymers

et al. 2022

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“…However, excessive fly ash and GGBS may diminish extrudability due to increased water absorption. As the dosage increases, the water absorption rate rises, resulting in increased viscosity, thereby impeding the extrusion process during 3D printing 57 . The replacement of cement with silica fume 26 , rice husk ash 27 , limestone, and calcined clay 29 can enhance buildability.…”

Section: Impacts Of Scms On Fresh Propertiesmentioning

confidence: 99%

“…While silica fume reduces workability due to its high surface area 26 , fly ash and GGBS can enhance pumpability and extrudability when added appropriately. However, excessive amounts may hinder extrudability due to increased water absorption 57 . Substituting cement with fly ash, silica fume, rice husk ash, limestone, and calcined clay enhances buildability 26,27,58 .…”

Section: Impacts Of Scms On Fresh Propertiesmentioning

confidence: 99%

“…However, small additions of fly ash and GGBS can enhance mechanical properties but excessive amounts may compromise concrete strength. This is mainly due to that the high amount of replacement of cement with fly ash or GGBS reduces the initial cement hydration at the early stage 57 . As a result, the mechanical performance of 3D printable concrete decreases.…”

Section: Impacts Of Scms On Mechanical Properties and Sustainabilitymentioning

confidence: 99%

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A comprehensive review of sustainable materials and toolpath optimization in 3D concrete printing

Zhuang,

Xu,

et al. 2024

npj Mater. Sustain.

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The construction sector has experienced remarkable advancements in recent years, driven by the demand for sustainable and efficient building practices. Among these advancements, 3D concrete printing has emerged as a highly promising technology that holds the potential to revolutionize the construction industry. This review paper aims to provide a comprehensive analysis of the latest developments in three vital areas related to 3D concrete printing: sustainable materials, structural optimization, and toolpath design. A systematic literature review approach is employed based on established practices in additive manufacturing for construction to explore the intersections between these areas. The review reveals that material recycling plays a crucial role in achieving sustainable construction practices. Extensive research has been conducted on structural optimization methodologies to enhance the performance and efficiency of 3D printed concrete structures. In the printing process, toolpath design plays a significant role in ensuring the precise and efficient deposition of concrete. This paper discusses various toolpath generation strategies that take factors such as geometric complexity, printing constraints, and material flow control into account. In summary, the insights presented in this paper may serve as guidelines for researchers, engineers, and industry professionals towards sustainable and efficient construction practices using 3D concrete printing technology.

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“…However, when the slag content exceeded 20%, a significant deterioration in the rheological properties of 3D-printed concrete and an increase in initial printable time were observed. Xu et al [9] employed a combination of fly ash/slag (FA/S) and sulfo-aluminate cement (SAC) at various proportions as a partial replacement for cement. They found that with FA content exceeding 20%, there was an increase in slump and a decrease in mechanical properties, affecting buildability.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly 3D Printing Mortar with Low Cement Content: Investigation on Printability and Mechanical Properties

Sukontasukkul,

Komkham,

Jamnam

et al. 2024

Civ Eng J

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The conventional approach to achieving optimal printability and buildability in 3D printing mortar relies heavily on cement, which is both costly and environmentally detrimental due to substantial carbon emissions from its production. This study aims to mitigate these issues by investigating the viability of slag as a partial substitute for cement, with the goal of developing an eco-friendly alternative. The newly formulated mortar, featuring a 30% reduction in cement content (from 830 to 581 kg/m3) and the inclusion of 0.10% micro-fibers, exhibits properties comparable to conventional 3D printing mortar. The research is structured into two parts: Part 1 focuses on determining the optimal fiber content, while Part 2 delves into the investigation of fiber-reinforced mortar with reduced cement content for 3D printing. Criteria were established to ensure mortar flow at 115%, initial printable time below 60 minutes, and 7-day compressive strength exceeding 28 MPa. Part 1 results indicate that a fiber content of 0.1% by volume meets the specified requirements. In Part 2, it was observed that increasing the slag replacement percentage extended the initial printable time and time gap. However, even at a 30% replacement rate, the initial printable time remained within the acceptable range, partially attributed to the presence of fibers in the mix. Additionally, higher slag content led to increased flow and reduced filament height in the mixes. Notably, all formulations surpassed the 7-day compressive strength threshold. These findings underscore the potential of slag as a sustainable alternative to cement in 3D printing fiber-reinforced mortar, offering promising prospects for environmentally friendly construction practices. Doi: 10.28991/CEJ-2024-010-03-010 Full Text: PDF

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Effect of FA and GGBFS on compressive strength, rheology, and printing properties of cement-based 3D printing material

Cited by 38 publications

References 31 publications

Study of the Interaction of Cement-Based Materials for 3D Printing with Fly Ash and Superabsorbent Polymers

Study of the Interaction of Cement-Based Materials for 3D Printing with Fly Ash and Superabsorbent Polymers

A comprehensive review of sustainable materials and toolpath optimization in 3D concrete printing

Eco-friendly 3D Printing Mortar with Low Cement Content: Investigation on Printability and Mechanical Properties

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