An approach to develop printable strain hardening cementitious composites. (5th May 2019)
- Record Type:
- Journal Article
- Title:
- An approach to develop printable strain hardening cementitious composites. (5th May 2019)
- Main Title:
- An approach to develop printable strain hardening cementitious composites
- Authors:
- Chaves Figueiredo, Stefan
Romero Rodríguez, Claudia
Ahmed, Zeeshan Y.
Bos, D.H.
Xu, Yading
Salet, Theo M.
Çopuroğlu, Oğuzhan
Schlangen, Erik
Bos, Freek P. - Abstract:
- Abstract: New additive manufacturing methods for cementitious materials hold a high potential to increase automation in the construction industry. However, these methods require new materials to be developed that meet performance requirements related to specific characteristics of the manufacturing process. The appropriate characterization methods of these materials are still a matter of debate. This study proposes a rheology investigation to systematically develop a printable strain hardening cementitious composite mix design. Two known mixtures were employed and the influence of several parameters, such as the water-to-solid ratio, fibre volume percentage and employment of chemical admixtures, were investigated using a ram extruder and Benbow-Bridgwater equation. Through printing trials, rheology parameters as the initial bulk and shear yield stress were correlated with variables commonly employed to assess printing quality of cementitious materials. The rheology properties measured were used to predict the number of layers a developed mixture could support. Selected mixtures had their mechanical performance assessed through four-point bending, uni-axial tensile and compressive strength tests, to confirm that strain hardening behaviour was obtained. It was concluded that the presented experimental and theoretical framework are promising tools, as the bulk yield stress seems to predict buildability, while shear yield stress may indicate a threshold for pumpability.Abstract: New additive manufacturing methods for cementitious materials hold a high potential to increase automation in the construction industry. However, these methods require new materials to be developed that meet performance requirements related to specific characteristics of the manufacturing process. The appropriate characterization methods of these materials are still a matter of debate. This study proposes a rheology investigation to systematically develop a printable strain hardening cementitious composite mix design. Two known mixtures were employed and the influence of several parameters, such as the water-to-solid ratio, fibre volume percentage and employment of chemical admixtures, were investigated using a ram extruder and Benbow-Bridgwater equation. Through printing trials, rheology parameters as the initial bulk and shear yield stress were correlated with variables commonly employed to assess printing quality of cementitious materials. The rheology properties measured were used to predict the number of layers a developed mixture could support. Selected mixtures had their mechanical performance assessed through four-point bending, uni-axial tensile and compressive strength tests, to confirm that strain hardening behaviour was obtained. It was concluded that the presented experimental and theoretical framework are promising tools, as the bulk yield stress seems to predict buildability, while shear yield stress may indicate a threshold for pumpability. Graphical Abstract: Unlabelled Image Highlights: A quantitative methodology based on rheological parameters to develop printable cementitious composites is presented The methodology was successfully applied to the development of printable strain hardening cementitious composites A correlation between shape stability and buildability with the initial bulk yield stress was found The use of VMA and the liquid/solid ratio are key factors to control mixture stability and fibre dispersion Rheological properties measured with the ram extruder and Benbow-Bridgwater model can suggest the build height of an object. … (more)
- Is Part Of:
- Materials & design. Volume 169(2019)
- Journal:
- Materials & design
- Issue:
- Volume 169(2019)
- Issue Display:
- Volume 169, Issue 2019 (2019)
- Year:
- 2019
- Volume:
- 169
- Issue:
- 2019
- Issue Sort Value:
- 2019-0169-2019-0000
- Page Start:
- Page End:
- Publication Date:
- 2019-05-05
- Subjects:
- 3D printing -- Rheology -- Strain hardening -- Additive manufacturing
Materials -- Periodicals
Engineering design -- Periodicals
Matériaux -- Périodiques
Conception technique -- Périodiques
Electronic journals
620.11 - Journal URLs:
- http://catalog.hathitrust.org/api/volumes/oclc/9062775.html ↗
http://www.sciencedirect.com/science/journal/02641275 ↗
http://www.sciencedirect.com/science/journal/02613069 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.matdes.2019.107651 ↗
- Languages:
- English
- ISSNs:
- 0264-1275
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5393.974000
British Library DSC - BLDSS-3PM
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- 9672.xml