Validation of an Accelerated Carbonation Model for Limestone Aggregate Concrete

Atmospheric air contains a small amount of CO2 that slowly penetrates through the capillary pores of concrete. Carbon dioxide reacts with the cement’s hydrated calcium compounds forming calcium carbonate, which is an insoluble compound that precipitates inside the concrete pores. This reaction is known as concrete carbonation. As the carbonation rate is a very slow process, most of the research reported has been performed employing accelerated methods to obtain results in a short period of time. In this work, a model for concrete carbonation obtained with a 4% carbon dioxide concentration chamber was validated. For the validation, concrete specimens exposed for four years under a hot sub-humid urban climate were employed. The specimens were prepared using four different water-cement ratios and four different sources of crushed limestone aggregate of high absorption. Results showed a good correlation between the predicted values from the model and the measured values under natural exposure.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 935-941
  • Monograph Title: Concrete under Severe Conditions: Environment and Loading. Proceedings of the 6th International Conference on Concrete Under Severe Conditions (CONSEC'10), Merida, Yucatan, Mexico, 7-9 June 2010

Subject/Index Terms

Filing Info

  • Accession Number: 01444743
  • Record Type: Publication
  • ISBN: 9780415593168
  • Files: TRIS
  • Created Date: Aug 29 2012 2:36PM