We use cookies to enhance your experience. By continuing to browse this site you agree to our use of cookies. More info.

In an article recently published in the journal Additive Manufacturing, researchers discussed the form stability, rheological characteristics, and compressive strength of needle-like pigment-modified 3D printed colored cement composites.

Study: Rheological properties, shape stability and compressive strength of 3D printed colored cement composites modified by needle-like pigment . Image Credit: Parmna/Shutterstock.com

As one of the most rapidly developing additive manufacturing products, 3D printed concrete (3DPC) has been extensively researched as a construction material. In the case of 3D printed constructions, fresh cement pastes with outstanding extrudability and buildability are required for a successful installation. Fresh paste should have an appropriate plastic viscosity and dynamic yield stress during pumping and extrusion, as well as high static yield stress during the stacking.

Recent research has suggested that the flow law of various printed cementitious pastes incorporating supplementary material and rheological additives can be revealed by the controlling of rheology, which introduces the flow law of various printed cementitious pastes incorporating supplementary material and rheological additives.

White Portland cement (WPC) is a commonly utilized cementitious material in the architectural decoration sector because of its consistent performance, great lightness, and ease of dyeing. The research into 3D printed WPC composites, on the other hand, is still in its early stages. Furthermore, preparing 3D printed WPC composites so that they may display a wide range of colors and match artistic modeling requirements for architectural components brings additional obstacles.

In this study, the authors examined the impact of needle-like yellow pigment (YP) and sheet-like blue pigment (BP) as coloring components in 3D printed WPC-based materials on rheological characteristics, colorability, form stability, and compressive strength.

The team demonstrated how different pigment dosages affected color performance, buildability, extrudability, and mechanical strength of the 3D printed WPC and figured out what the best pigment dose was. The three primary colors' sheet-like blue pigment (BP) and needle-like yellow pigment (YP) were added to the WPC to create 3D printed colored cement composites (3DPCCCs). Using a precision colorimeter to confirm the saturation point of the color, the impact of various dosages of YP/BP on the shading effect was described.

The researchers measured the dynamic and static yield stress of 3DPCCCs changed by colors for managing structure deformation and printability. To analyze the mechanical property and hydration reaction, the hydration heat and compressive strength of 3DPCCCs were also examined. Further, the ideal mix's practicality was confirmed by printing a big pentagram component.

When the YP concentration approached 2%, huge micropores with pore diameter greater than 2 mm were found, along with a considerable rise in the relative macropores ratio. The compressive strength increased by 12.3% from 42.2 MPa to 47.4 MPa as the YP content increased from 0% to 2%.

When the BP content was increased from 0 to 2%, the structure deformation increased from 10.38% to 14.3%, then decreased to 11.5% when the BP content was increased to 4%. The static yield stress of 3DPCCCs was considerably reduced when BP was added, with a BP concentration in the region of 12%. The static yield stress of 3DPCCCs with 2% BP was 450 Pa, which was the lowest.

The addition of YP increased the static yield stress and thixotropy of 3DPCCCs, which resulted in a considerable reduction in structure deformation. The compressive strength of 3DPCCCs with 2% YP was enhanced by 12.3% to 47.4 MPa, and structure deformation was reduced by almost 50% when compared to the reference sample.

Although the inclusion of BP enhanced the extrudability of 3DPCCCs, it also lowered shape stability and compressive strength. Further, the paste displayed good extrudability and buildability in a scaled-up 3D printed pentagram component with 2% YP, and 16 layers of stacking were achieved without apparent deformation.

In conclusion, this study utilized the needle-like YP and sheet-like BP to color WPC-based materials in order to create 3DPCCCs. The primary goal was to see how they affected rheological behavior, colorability, printability, and compressive strength. As the pigment content in 3DPCCCs increased, the colorability improved.

The YP and BP both reached saturation thresholds of 3%, with a small total color difference. The YP greatly enhanced the static yield stress of 3DPCCCs, which was useful for improving buildability. To achieve the extrudability criterion, the YP content must not exceed 3%, and the dynamic yield stress of 3DPCCCs containing YP should be less than 414.17 Pa.

The inclusion of BP lowered the dynamic yield stress, allowing for better extrudability but at the expense of buildability and compressive strength. The compressive strength of 3DPCCCs having 2% YP incremented by 12.3% as compared to the reference sample. Furthermore, as the YP content increased to 4%, the structure deformation of 3DPCCCs having YP decreased by 69.7%. 2% YP was added to the mortar to create a big 3D printed pentagram with up to 16 layers without significant deformation, based on excellent printability and compressive strength.

More from AZoM: Reviewing the Use of Computational NIR Spectroscopy

Jin, Y., Xu, J., Li, Y., et al. Rheological properties, shape stability and compressive strength of 3D printed colored cement composites modified by needle-like pigment. Additive Manufacturing 102965 (2022). https://www.sciencedirect.com/science/article/abs/pii/S221486042200358X

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

Surbhi Jain is a freelance Technical writer based in Delhi, India. She holds a Ph.D. in Physics from the University of Delhi and has participated in several scientific, cultural, and sports events. Her academic background is in Material Science research with a specialization in the development of optical devices and sensors. She has extensive experience in content writing, editing, experimental data analysis, and project management and has published 7 research papers in Scopus-indexed journals and filed 2 Indian patents based on her research work. She is passionate about reading, writing, research, and technology, and enjoys cooking, acting, gardening, and sports.

Please use one of the following formats to cite this article in your essay, paper or report:

Jain, Surbhi. (2022, June 17). Researchers Test the Rheology of Colored 3D Printed Cement. AZoM. Retrieved on June 25, 2022 from https://www.azom.com/news.aspx?newsID=59361.

Jain, Surbhi. "Researchers Test the Rheology of Colored 3D Printed Cement". AZoM. 25 June 2022. <https://www.azom.com/news.aspx?newsID=59361>.

Jain, Surbhi. "Researchers Test the Rheology of Colored 3D Printed Cement". AZoM. https://www.azom.com/news.aspx?newsID=59361. (accessed June 25, 2022).

Jain, Surbhi. 2022. Researchers Test the Rheology of Colored 3D Printed Cement. AZoM, viewed 25 June 2022, https://www.azom.com/news.aspx?newsID=59361.

Do you have a review, update or anything you would like to add to this news story?

AZoM spoke with James Baker from [email protected] about the growth of graphene as an advanced material and its potential to shape the sustainable future of multiple sectors.

AZoM speaks with Alan Banks from Ford Motor Company about the significance of using lightweight materials in vehicles to improve fuel efficiency and the sustainability of the industry.

AZoM speaks with Joseph Toombs, a Ph.D. student at the University of California, Berkeley, about his research that has developed a new 3D printing process for the manufacture of small glass objects.

This product profile outlines the MAX-iR FTIR Gas Analyzer from Thermo Fisher Scientific.

Learn more about the JAM-5200EBM E-Beam Metal Additive Manufacturing System for 3D Printing.

This product profile outlines the features and benefits of the Contour X - 500 3D Optical Profilometer.

This article provides an end-of-life assessment of lithium-ion batteries, focusing on the recycling of an ever-growing amount of spent Li-Ion batteries in order to work toward a sustainable and circular approach to battery use and reuse.

Corrosion is the degradation of an alloy caused by its exposure to the environment. Corrosion deterioration of metallic alloys exposed to the atmosphere or other adverse conditions is prevented using a variety of techniques.

Due to the ever-increasing demand for energy, the demand for nuclear fuel has also increased, which has further created a significant increase in the requirement for post-irradiation examination (PIE) techniques.

AZoM.com - An AZoNetwork Site

Owned and operated by AZoNetwork, © 2000-2022