| Autor: |
Asadi Iman, Skjølsvold Ola, Kanstad Terje, Jacobsen Stefan |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Nordic Concrete Research, Vol 70, Iss 1, Pp 25-42 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2545-2819 |
| DOI: |
10.2478/ncr-2023-0015 |
| Popis: |
The surface scaling of low CO2-emission High Performance Concretes (HPC) was studied in freeze/thaw performance tests with a 3 mm layer of 3% NaCl on the surface to investigate whether such concretes can be made frost durable without air entrainment. Four different non-air entrained silica fume (SF)-fly ash concrete mixes with w/b = 0.30 – 0.35 with 91d strengths >100 MPa were investigated after 3 different curing conditions (Normal, Dried, Wrapped). The w/b=0.30 CEM IIA reference mix without additional FA had lowest scaling following all curing conditions. However, all 4 mixes at all 3 curing conditions had severe internal damage. Liquid Uptake (LU) during freeze/thaw related best to internal damage. The correlation between LU-scaling and strain-scaling was very good for wrapped curing which also showed high internal damage. We therefore suggest proceeding in modelling simultaneous salt scaling and internal damage. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
