3D printability of ternary Portland cement mixes containing fly ash and limestone

Dey, Dhrutiman; Srinivas, Dodda; Boddepalli, Uday; Panda, Biranchi; Gandhi, Indu Siva Ranjani; Sitharam, T. G.

doi:10.1016/j.matpr.2022.09.020

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…of binder) [ 30 , 51 , 52 , 112 ] or high quantities (around 70% wt. of binder) [ 46 , 90 , 113 , 114 ] of FA has been studied by several authors to fulfil printing requirements and reduce cement amount of 3DPCC mixtures. FA as a cement replacement (from 50 to 80% wt.)…”

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

“…A 3DPCC ternary blend of 70% PC, 20% FA and 10% crushing quartzite sandstone enhanced 23.1% and 51.9% on compressive and flexural strength at 28 days, respectively, compared to mixtures exclusively composed by CEM I 42.5N [ 113 ]. Recent research on the influence of FA replacement with different SCM has also emerged in the literature [ 52 , 114 ]. In ternary binders with 70%wt.…”

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

“…Another SCM used as FA replacement was LF (from 0 to 15% wt. binder) in ternary mixtures with 70% FA and 30% PC [ 114 ]. Dey et al [ 114 ] developed extrudable and buildable 3DPCC and observed an increase in yield stress with increased LF content.…”

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

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3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Fonseca¹,

Matos

2023

Materials

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Three-dimensional Cementitious materials Printing (3DCP) is a cutting-edge technology for the construction industry. Three-dimensional printed buildings have shown that a well-developed automated technology can foster valuable benefits, such as a freeform architectural design without formworks and reduced human intervention. However, scalability, commercialization and sustainability of the 3DPC technology remain critical issues. The current work presents the ecological fragility, challenges and opportunities inherent in decreasing the 3DCP environmental footprint at a material level (cementitious materials and aggregates). The very demanding performance of printable mixtures, namely in a fresh state, requires high dosages of cement and supplementary cementitious materials (SCM). Besides the heavy carbon footprint of cement production, the standard SCM availability might be an issue, especially in the longer term. One exciting option to decrease the embodied CO2 of 3DCP is, for example, to incorporate alternative and locally available SCM as partial cement replacements. Those alternative SCM can be wastes or by-products from industries or agriculture, with no added value. Moreover, the partial replacement of natural aggregate can also bring advantages for natural resource preservation. This work has highlighted the enormous potential of 3DCP to contribute to reducing the dependence on Portland cement and to manage the current colossal wastes and by-products with no added value, shifting to a Circular Economy. Though LCA analysis, mixture design revealed a critical parameter in the environmental impact of 3DCP elements or buildings. Even though cement significantly affects the LCA of 3DCP, it is crucial to achieving adequate fresh properties and rheology. From the literature survey, mixtures formulated with alternative SCM (wastes or by-products) are still restricted to rice husk ash, Municipal Solid Waste ashes and recycled powder from construction and demolition wastes. Natural aggregate replacement research has been focused on recycled fine sand, mine tailing, copper tailing, iron tailing, ornamental stone waste, recycled glass, crumb rubber, rubber powder and granules, recycled PET bottles and steel slag. However, flowability loss and mechanical strength decrease are still critical. Research efforts are needed to find low-carbon cement replacements and mix-design optimization, leading to a more sustainable and circular 3DCP while ensuring the final product performance.

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Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

Section: Powder Constituent Materials: Characterization and Effectmentioning

confidence: 99%

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3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Fonseca¹,

Matos

2023

Materials

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“…Skibicki et al [ 17 ] showed in a study that while LP had no effect on the compressive strength of printable mixtures with higher binder contents, it was effective in improving the buildability and compressive strength of mixtures with lower binder contents. The primary benefit of using LP is that it not only enhances rheological performance, but also lowers the need for cement, making printable mixes more sustainable [ 18 ]. Similarly, the incorporation of SF has been reported to increase the yield stress and plastic viscosity of cementitious materials, while reducing the flowability.…”

Section: Introductionmentioning

confidence: 99%

Printability, Thermal and Compressive Strength Properties of Cementitious Materials: A Comparative Study with Silica Fume and Limestone

et al. 2022

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Over the past decade, 3D printing in the construction industry has received worldwide attention and developed rapidly. The research and development of cement and concrete products has also become quite well-established over the years, while other sustainable materials receive considerably lower attention in comparison. This study aims to investigate the influence of the two most commonly used sustainable cementitious materials i.e., silica fume and limestone powder, on printability, thermal and mechanical properties of fly ash–Portland cement blends. Ternary blends containing Portland cement, fly ash and silica fume or limestone powder are prepared, whereas phase change material (PCM) is introduced to improve the thermal behavior. Based on the rheological properties and concurrent 3D concrete printing, improved buildability of the modified mixtures is linked to their static yield stress. Anisotropic mechanical properties are observed for 3D printed specimens, while cast specimens exhibit a maximum 41% higher compressive strength due to better material compaction. It is clear from the results that addition of silica fume and limestone powder ranged from 5% to 10%, reducing the anisotropic mechanical properties (maximum 71% and 68% reduction in anisotropic factor, respectively) in the printed specimens. The PCM addition ranged from 5% to 10% and improved thermal performance of the mixtures, as measured by a decrease in thermal conductivity (9% and 13%) and an increase in volumetric heat capacity (9% and 10%), respectively. However, the PCM-containing mixtures show around 29% reduction in compressive strength, compared to the control specimen, which necessitates new material design considering matrix strengthening methods.

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Impact of Water to Solids Ratio on Stability, Printability, and Mechanical Characteristics of 3D Printable Foam Concrete

Boddepalli,

Panda,

Gandhi

2024

Construction 3D Printing

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3D printability of ternary Portland cement mixes containing fly ash and limestone

Cited by 11 publications

References 11 publications

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

3D Construction Printing Standing for Sustainability and Circularity: Material-Level Opportunities

Printability, Thermal and Compressive Strength Properties of Cementitious Materials: A Comparative Study with Silica Fume and Limestone

Impact of Water to Solids Ratio on Stability, Printability, and Mechanical Characteristics of 3D Printable Foam Concrete

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