| Autor: |
Choinska Marta, Al-Khazraji Hayder, Benkemoun Nathan, Khelidj Abdelhafid |
| Jazyk: |
English<br />French |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
MATEC Web of Conferences, Vol 163, p 02001 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2261-236X |
| DOI: |
10.1051/matecconf/201816302001 |
| Popis: |
The aim of this study is to investigate the interaction between crack opening (COD), aggregate size and gas transfer in concrete submitted to mechanical loading in the Brazilian splitting tensile test. The lab-made devices have been developed to investigate physical phenomena during loading and to provide data to validate a developed mesoscale hydromechanical model by the same authors, based upon a 3D lattice approach to represent the heterogeneity of the material [1]. Experimental studies has been carried out on five materials with different aggregate sizes. The results emphasize that permeability of mortar increases with cracking following a sigmoid law, with the most important kinetics due to passingthrough connected crack growth, after nonsymmetric one-face crack initiation. Furthermore, the obtained results highlight that permeability increase, due to aggregate size, may be separated from permeability increase due to tensile cracking: for all the five materials tested results fall on the same master sigmoid curve. This behaviour law represents a strong advantage for concrete modelling. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
