Journal
MATERIALS AND STRUCTURES
Volume 47, Issue 4, Pages 693-707Publisher
SPRINGER
DOI: 10.1617/s11527-013-0089-2
Keywords
Alkali-activated slag; Aged concretes; Durability; Natural carbonation
Categories
Funding
- Australian Research Council (ARC)
- Particulate Fluids Processing Centre
- Special Research Centre of the ARC
- Universidad del Valle (Colombia)
- GEOCERAM Project
Ask authors/readers for more resources
Alkali-activated slag concretes stored for 7 years under atmospheric conditions are assessed, and the structural characteristics of naturally carbonated regions are determined. Concretes formulated with a 400 kg/m(3) and water/binder (w/b) ratio between 0.42 and 0.48 present similar natural carbonation depths, although these concretes report different permeabilities after 28 days of curing. The inclusion of increased contents of binder leads to a substantial reduction of the CO2 penetration in these concretes, so that negligible carbonation depth values (2 mm) are identified in concretes formulated with 500 kg/m(3) of binder. Calcite, vaterite, and natron are identified as the main carbonation products formed in these concretes. These observations differ from the trends which would be expected in comparable ordinary Portland cement-based concretes, which is attributable to the physical (permeability) and chemical properties of alkali-activated slag concretes promoting high long-term stability and acceptably slow carbonation progress under natural atmospheric conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available