1. Directive 2008/98/EC of the European Parliament and of the Council of 19 November 2008 on waste and repealing certain directives;European Commisssion;Off. J. Eur. Union.,2008
2. Ellen MacArthur Foundation, Growth within: a circular economy vision for a competitive Europe, Ellen MacArthur Found. (2015). https://www.ellenmacarthurfoundation.org/assets/downloads/publications/EllenMacArthurFoundation_Growth-Within_July15.pdf (accessed December 16, 2016).
3. Use of gypsum and CKD to enhance early age strength of High Volume Fly Ash (HVFA) pastes;Bondar;Constr. Build. Mater.,2014
4. The role of water content and paste proportion on physico-mechanical properties of alkali activated fly ash GGBS concrete;Vinai;J. Sustain. Metall.,2016
5. Geopolymer Chemistry & Applications;Davidovits,2015