Skip to Main content Skip to Navigation
Conference papers

Enhancing Printable Concrete Thixotropy by High Shear Mixing

Résumé : Our results show that the storage elastic modulus as a function of time increases at a higher rate for the cement paste mixed at higher versus lower mixing intensiy. Hence, higher mixing appears to be enhancing thixotropy. Using calorimetry analysis we find that higher mixing decreases the setting time and enhances the peak of the heat flow. By analyzing the nanoparticles present in the suspending fluid of the cement paste, we show, in accordance with literature, that an appropriate combination of mixing energy and superplasticizer dosage promotes hydration by scratching hydrates from the surface of cement particles, stabilizing them in the suspending fluid and hence generating additional nucleation surfaces. These results open the door for the design of printing heads including high-shear micro mixers allowing for a faster liquid-to-solid transition of the printable material.
Document type :
Conference papers
Complete list of metadata

Cited literature [9 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01913688
Contributor : Ifsttar Cadic <>
Submitted on : Tuesday, November 6, 2018 - 2:44:01 PM
Last modification on : Tuesday, December 8, 2020 - 10:20:42 AM
Long-term archiving on: : Thursday, February 7, 2019 - 4:11:24 PM

File

doc00029692.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Aileen Vandenberg, Hela Bessaies Bey, Kay Wille, Nicolas Roussel. Enhancing Printable Concrete Thixotropy by High Shear Mixing. Digital Concrete 2018 : First Rilem International Conference on Concrete and Digital Fabrication, Sep 2018, ZURICH, Switzerland. pp. 94-101, ⟨10.1007/978-3-319-99519-9_9⟩. ⟨hal-01913688⟩

Share

Metrics

Record views

173

Files downloads

316