Please note that this is a scanned copy of a paper originally published in 1981, so the text is not as clear as in documents created as pdf files. 

 
This paper discusses the carbonation of normal dense concrete resulting from the reaction of  atmospheric carbon dioxide gas with hydrated cement compounds, particularly in relation to the assessment of the corrosion risk to embedded steel. It describes the carbonation process and how the extent of carbonation may be measured, outlines the various factors influencing the depth and rate of carbonation, indicates the possible effects produced in hardened concrete, and briefly discusses maintenance. 4 pages.