Purdue University and Solidia Technologies have conducted tests to demonstrate that concrete cured with carbon dioxide (CO2) performs comparably or better than traditional Portland Cement-based concrete. The tests covered performance related to cold weather resistance and exposure to extreme conditions.
Purdue University Professor of Civil Engineering Jan Olek commented: "On multiple indicators, our findings underscore comparable or favourable performance of the calcium silicate-based carbonated concrete under severe conditions."
Tests of the CO2-cured concrete show the product has good freeze-thaw resistance and scaling resistance in comparison with the traditional form.
The CO2-curing technology reduces water consumption in the production of concrete up to 80%, carbon emissions up to 70%, and the curing time to one day.
There is no shortage of challenges when it comes to any cement silo cleanout project. Mole•Master Services Corporation was contracted to resolve a number of issues at a large cement producer in northeastern Missouri, US.
Nick DeCristofaro and Sada Sahu of Solidia Technologies®, USA, discuss carbon dioxide curing in low-carbon Solidia cement in the second part of this abridged article from the World Cement January 2014 issue.