Advances in alternative cementitious binders

Mechanical and Microstructural Characterization of Alkali-Activated Materials Based on Fly Ash and Slag

“…Most previous studies deal only with alkali-activated slag or fly ash, as for the combined use of both, relatively little information is reported [1]. How to merge the two kinds of materials into one to complement each other in performance is an important issue and needs further research.…”

“…In recent years, different kinds of alkali-activated cementitious materials have been developed because of their high strength and durability and low environmental impact [1]. Alkali-activated cementitious materials are made by mixing industrial aluminosilicate waste materials such as fly ash (FA) [2] or ground granulated blast furnace slag (GGBFS) [3]with an alkaline activating solution [4].…”

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

“…These materials offer a viable environmentally friendly replacement for PC, with a reduction in the associated CO2 emissions of between 50% and 80% when compared to PC binders [12]. Furthermore, as the raw materials used to produce geopolymers are often industrial by-products such as blast furnace slag and fly ash, or readily available aluminosilicate clay-based products such as metakaolin (calcined kaolinite), they present an avenue for the use of, and add value to, these materials.…”

Effect of graphene oxide on the mechanical properties and the formation of layered double hydroxides (LDHs) in alkali-activated slag cement

“…Alkali-activated slag cement (AAS), which can be a clinker-free binder, provides an eco-friendly alternative to conventional Portland cement [1]. The use of granulated ground blast furnace slag (GGBFS) as the precursor provides a significant lower carbon dioxide emission as well as lower energy consumption than ordinary Portland cement (OPC) [2][3][4][5].…”