Cementos híbridos de bajo impacto ambiental: Reducción del factor clinker

The environmental problems posed by Portland cement manufacture have prompted the scientific committee to seek more eco-efficient binders with the same technological features as OPC; hybrid cements are among such alternative materials. Hybrid alkaline cements are multi-component systems containing a high mineral addition (fly ash (FA), metakaolin (MK), blast furnace slag (BFS)) content, low proportions (<30 %) of portland clinker and moderately alkaline activators. The substantially lower amount of clinker needed to manufacture these binders than ordinary Portland cement is both economically and ecologically beneficial. The present study explored strength development and the reaction products generated by several hybrid cements, consisting of a number of industrial by-products and very low Portland clinker contents.

Keywords:alkaline activation; geopolymer; hybrid cements; mechanical strength; NMR.