https://www.geopolymer.org/fichiers_pdf/FA-GP-Concrete.pdf
https://drive.google.com/open?id=1IpaLMh5KCCdbiaRqZ9RZ2ldQN6FgLVKr
https://docs.google.com/document/d/1Pc6LTKwUSoUdHwx8H1QHqzltyNyc8NpWg9_hE1qHkY8/edit#
