Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature
AbstractPresent concerns about global warming due to the greenhouse emissions in the atmosphere have pushed the cement industry to research alternatives to ordinary Portland cement (OPC). Geopolymer binder may constitute a possible breakthrough in the development of sustainable materials: understanding the effectiveness and the influences of superplasticizers on geopolymer systems is one of the essential requirements for its large-scale implementation. This study aims to investigate the possibility of using commercially available chemical admixtures designed for OPC concrete, to improve fresh properties of fly ash-based geopolymers and mortars. A special emphasis is laid upon evaluating their influence on mechanical and microstructural characteristics of the hardened material realized under room-temperature curing conditions. Results indicate that the addition of a polycarboxylic ether-based superplasticizer, in the amount of 1.0 wt. % by mass of fly ash, promotes an improvement in workability without compromising the final strength of the hardened material. Moreover, the addition of the polycarboxylic ether- and acrylic-based superplasticizers induces a refinement in the pore structure of hardened mortar leading to a longer water saturation time. View Full-Text
Share & Cite This Article
Carabba, L.; Manzi, S.; Bignozzi, M.C. Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature. Materials 2016, 9, 586.
Carabba L, Manzi S, Bignozzi MC. Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature. Materials. 2016; 9(7):586.Chicago/Turabian Style
Carabba, Lorenza; Manzi, Stefania; Bignozzi, Maria C. 2016. "Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature." Materials 9, no. 7: 586.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.