| Titre : | A new test method for determining the fracture toughness of concrete materials (2012) |
| Auteurs : | John Jy-An Wang, Auteur ; Ken C. Liu Dan Naus, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Cement and concrete research (Vol. 40 N° 3, Mars 2010) |
| Article en page(s) : | pp. 497–499 |
| Note générale : | Bibliogr. |
| Langues : | Anglais |
| Tags : | Fracture toughness ; Mortar Concrete |
| Résumé : | The Spiral Notch Torsion Test (SNTT) determines the intrinsic fracture toughness (KIC) of structural materials by applying pure torsion to cylindrical specimens having a notch line that spirals around the specimen at a 45° pitch. KIC values are obtained with the aid of a three-dimensional finite-element computer code, TOR3D-KIC. The SNTT method is suitable for testing a wide variety of materials used extensively in pressure vessel and piping structural components and weldments, as well as ceramic and graphite materials. One important characteristic of SNTT is that neither a fatigue precrack nor a deep notch is required for evaluation of brittle materials, significantly reducing the sample size requirement. Results are reported for a Portland cement-based mortar demonstrating applicability of the SNTT method to cementitious materials. The estimated KIC of the tested mortar samples with compressive strength of 34.45 MPa was found to be 0.360 ± 0.017 MPa √m. |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0008884609002725 |
