| Titre : | Autogenous healing of engineered cementitious composites under wet–dry cycles (2009) |
| Auteurs : | Yingzi Yang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Cement and concrete research (Vol. 39 N° 5, Mai 2009) |
| Article en page(s) : | pp. 382–390 |
| Note générale : | Génie Civil |
| Langues : | Anglais |
| Tags : | Self-healing ; Mechanical properties ; Transport Tensile Permeability ; Cracks |
| Résumé : | Self-healing of Engineered Cementitious Composites (ECC) subjected to two different cyclic wetting and drying regimes was investigated in this paper. To quantify self-healing, resonant frequency measurements were conducted throughout wetting–drying cycles followed by uniaxial tensile testing of self-healing ECC specimens. Through self-healing, crack-damaged ECC recovered 76% to 100% of its initial resonant frequency value and attained a distinct rebound in stiffness. Even for specimens deliberately pre-damaged with microcracks by loading up to 3% tensile strain, the tensile strain capacity after self-healing recovered close to 100% that of virgin specimens without any preloading. Also, the effects of temperature during wetting–drying cycles led to an increase in the ultimate strength but a slight decrease in the tensile strain capacity of rehealed pre-damaged specimens. This paper describes the experimental investigations and presents the data that confirm reasonably robust autogenous healing of ECC in commonly encountered environments for many types of infrastructure. |
| ISSN : | 0008-8846 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0008884609000222 |
