| Titre : | A new system for crack closure of cementitious materials using shrinkable polymers (2012) |
| Auteurs : | Anthony Jefferson, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Cement and concrete research (Vol. 40 N° 5, Mai 2010) |
| Article en page(s) : | pp. 795–801 |
| Note générale : | Bibliogr. |
| Langues : | Anglais |
| Tags : | Long-term performance ; Durability ; Shape Memory Polymer ; Crack–healing |
| Résumé : |
This paper presents details of an original crack-closure system for cementitious materials using shrinkable polymer tendons. The system involves the incorporation of unbonded pre-oriented polymer tendons in cementitious beams. Crack closure is achieved by thermally activating the shrinkage mechanism of the restrained polymer tendons after the cement-based material has undergone initial curing.
The feasibility of the system is demonstrated in a series of small scale experiments on pre-cracked prismatic mortar specimens. The results from these tests show that, upon activation, the polymer tendon completely closes the preformed macro-cracks and imparts a significant stress across the crack faces. The potential of the system to enhance the natural autogenous crack healing process and generally improve the durability of concrete structures is addressed. |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0008884610000062 |
