Improving Printability of Limestone-Calcined-Clay-Based Cementitious Materials by Using Viscosity-Modifying Admixture (2020-03)¶

10.1016/j.cemconres.2020.106040

Chen Yu, Figueiredo Stefan, Li Zhenming, Chang Ze, Jansen Koen, Çopuroğlu Oğuzhan, Schlangen Erik
Journal Article - Cement and Concrete Research, Vol. 132

Abstract

In 3D concrete printing (3DCP), it is necessary to meet contradicting rheological requirements: high fluidity during pumping and extrusion, and high stability and viscosity at rest to build the layered structure. In this paper, the impact of the hydroxypropyl methylcellulose (HPMC)-based viscosity-modifying admixture (VMA) on the 3D printability and mechanical performance of a limestone and calcined clay based cementitious material is investigated. A combination of VMA and superplasticizer was used for that purpose. In this case, controlling the competitive effects between VMA and superplasticizer becomes critical. The main strategy for 3D printing in this study was to add an optimal dosage of VMA in the solid suspension that was already mixed with water and superplasticizer. A lab-scale 3DCP setup was developed and demonstrated as well. A series of tests was performed to characterize the effects of VMA on flowability, extrudability, open time, buildability, green strength, hydration, compressive strength, and air void content and distribution. Experiments performed in this study showed that the mixture containing 0.24% (of the binder mass) of VMA exhibited satisfactory 3D printability and optimal mechanical performance. Finally, the results, limitations, and perspectives of the current research were discussed

¶

45 References

214 Citations

BibTeX

@article{chen_figu_li_chan.2020.IPoLCCBCMbUVMA,
  author            = "Yu Chen and Stefan Chaves Figueiredo and Zhenming Li and Ze Chang and Koen Jansen and Oğuzhan Çopuroğlu and Erik Schlangen",
  title             = "Improving Printability of Limestone-Calcined-Clay-Based Cementitious Materials by Using Viscosity-Modifying Admixture",
  doi               = "10.1016/j.cemconres.2020.106040",
  year              = "2020",
  journal           = "Cement and Concrete Research",
  volume            = "132",
}

Formatted Citation

IEEE

Y. Chen, “Improving Printability of Limestone-Calcined-Clay-Based Cementitious Materials by Using Viscosity-Modifying Admixture”, Cement and Concrete Research, vol. 132, 2020, doi: 10.1016/j.cemconres.2020.106040.

CMOS

Chen, Yu, Stefan Chaves Figueiredo, Zhenming Li, Ze Chang, Koen Jansen, Oğuzhan Çopuroğlu, and Erik Schlangen. “Improving Printability of Limestone-Calcined-Clay-Based Cementitious Materials by Using Viscosity-Modifying Admixture”. Cement and Concrete Research 132 (2020). https://doi.org/10.1016/j.cemconres.2020.106040.