Predicting Frost Resistance of Concrete with Different Coarse Aggregate Concentration by Porosity Parameters

  • Džigita NAGROCKIENĖ Vilnius Gediminas Technical University
  • Gintautas SKRIPKIŪNAS Vilnius Gediminas Technical University
  • Giedrius GIRSKAS Vilnius Gediminas Technical University
Keywords: concrete, water absorption, coarse aggregate concentration, porosity parameters, frost resistance factor

Abstract

Frost resistance is one of the key indicators of concrete quality. Frost resistance can be determined by direct testing; however it is time-consuming and labour-intensive method. Concrete decomposition is a complex process (from initial signs of degradation to complete failure of the surface subjected to freezing) involving many factors. Frost resistance of concrete can be predicted from porosity parameters after determining their relation to frost resistance. Test results showed the relation between the closed porosity of concrete and frost resistance factor. Closed porosity of concrete was found to have a significant influence on frost resistance factor. It is shown that closed porosity depends on the concentration of coarse aggregate in concrete, the closed porosity and predicted frost resistance of concrete increase with lower concentration of coarse aggregate.

http://dx.doi.org/10.5755/j01.ms.17.2.493

Section
CONSTRUCTION MATERIALS