| Titre : |
The importance of hydration : Using accelerators to influence cementselting, strength and 3D printing application |
| Type de document : |
texte imprimé |
| Auteurs : |
Tobias Dorn, Auteur ; Tamino Hirsch, Auteur ; Stephan Dietmar, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 48-54 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Diffraction
Hydratation
Impression tridimensionnelle
Matériaux cimentaires -- Additifs
Microscopie électronique à balayage
Résistance à la compression
Thermogravimétrie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Research into 3D concrete printing has revealed the huge po-tential of this new construction method. A study into the in-fluence of accelerators on cernent hydration shows the possibilities of adapting cement pastes to the printing process and uses parameters such as compressive strength and setting time to determine the right dosage. |
| Note de contenu : |
- Compressive strength as a key parameter for printing
- Experimental
- Cement paste and mortar preparation
- Early compressive strength determination
- In-situ X-ray diffraction
- Thermogravimetric analysis
- Scanning electron microscopy
- Acceleration boost strength
- Admixtures change crystallinity
- Tailored cement pastes for printing
- Fig. 1a : Vicat needle penetration as a function of admixture concentration. Dashed : initial setting time ; solid : final stetting time. 1b : early compressive strength development of accelerated cement samples, determined with MILD
- Fig. 2 : TGA determination of weight loss and differentiated weight loss
- Fig. 3 : In-situ XRD recorded over 24h ; a) reference ; b) Ca(NO3)2-2.33 wt.% ; c) TEA - 0.1 wt.% ; d) Na2CO3-5.0 wt.% ; Et : ettringite, Pt : portlandite ; Al : alite ; Bl : belite
- Fig. 4a : SEM-BSA of samples with 0.1 wt.% TEA (1h hydration), b shows long ettringite needles (24 h hydration)
- Table 1 : Composition of the used CEM 1 52.5R determined by XRF
- Table 2 : Specifications of the used admixtures |
| En ligne : |
https://drive.google.com/file/d/11nToMmrBbaqhmD0wd7FvYVvD563F-DF0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32909 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2019) . - p. 48-54
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