| Autor: |
Patrick F. McGrath, R. Doug Hooton |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
Cement and Concrete Research. 29:1239-1248 |
| ISSN: |
0008-8846 |
| DOI: |
10.1016/s0008-8846(99)00058-7 |
| Popis: |
There is a need to develop a better understanding of the relationship among short-, medium-, and long-term tests to assess the resistance of concrete to chloride penetration. In this contribution, a resistivity-based test is compared to a 90-day salt ponding test. The short-term (6-h) rapid chloride permeability test has been criticized for its lack of a scientific basis and poor correlation to the so-called control ponding test. Comparative testing is presented for several concrete and mortar mixtures, which suggests that if modifications are made to test procedures and methods of analysis then the relationship between the results of the resistivity-based test and the diffusion-based test is improved. The 90-day salt ponding test can be improved by using a depth of penetration approach rather than an integral chloride content and by limiting the transport process to diffusion only. Modification to the rapid chloride test by shortening the test time to 30 min did not improve the correlation to other test methods for the range of concretes studied here. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect