@misc{9241251,
  abstract     = {{Concrete is one of the most widely used construction materials, offering several advantages 
but also presenting certain limitations. One of its most significant drawbacks is the substantial 
carbon dioxide emissions associated with the production of Portland cement, the essential 
binder in concrete. Replacing portions of Portland cement with alternative binders is 
considered the most effective and rapid measure for reducing the climate impact of concrete. 
As the use of alternative binders continues to increase, there is a growing need for a better 
understanding of the air-void system in concrete containing such binders. The air-void system 
plays a crucial role in several properties of concrete. Since it is influenced by multiple factors, 
ensuring an appropriate and stable air-void system remains a challenge.
 
The objectives of this study were to investigate whether the choice of superplasticizer and air
entraining admixture, as well as mixing time, affected the formation of the air-void system in 
concrete containing ground granulated blast-furnace slag. Admixtures from two different 
manufacturers and two different mixing times were evaluated. For concrete containing ground 
granulated blast-furnace slag, the air-void system, workability, and compressive strength were 
investigated. The air-void system was determined using AVA, thin-section analysis, and the 
pressure method.
 
The results showed that the air-void system varied depending on the type of superplasticizer 
and air-entraining admixture used. Admixtures from one manufacturer generally resulted in 
higher air content, lower spacing factor, larger specific surface, and a higher proportion of 
microvoids compared to admixtures from the other manufacturer. Furthermore, the results 
showed that mixing time affected the air-void system, although the effect varied between mix 
designs. A longer mixing time tended to result in higher air content, lower spacing factor, and 
larger specific surface for one mix design, whereas the opposite trend was observed for the 
other. Thus, the results indicate that the choice of superplasticizer and air-entraining 
admixture, as well as mixing time, influences the formation of the air-void system in concrete 
containing ground granulated blast-furnace slag.}},
  author       = {{Wennerberg, Elin}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBM}},
  title        = {{Luftporsystem i betong med mald granulerad masugnsslagg}},
  year         = {{2026}},
}