Next Article in Journal
Novel Mg-Doped SrMoO3 Perovskites Designed as Anode Materials for Solid Oxide Fuel Cells
Next Article in Special Issue
Benefits of Sealed-Curing on Compressive Strength of Fly Ash-Based Geopolymers
Previous Article in Journal
Anomalous Halo Formation in an Arc-Melted ScNi-Sc2Ni Off-Eutectic Binary Alloy
Previous Article in Special Issue
Optimizing and Characterizing Geopolymers from Ternary Blend of Philippine Coal Fly Ash, Coal Bottom Ash and Rice Hull Ash
Open AccessArticle

Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature

Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini, 28, Bologna 40131, Italy
Author to whom correspondence should be addressed.
Academic Editor: Claudio Ferone
Materials 2016, 9(7), 586;
Received: 31 May 2016 / Revised: 10 July 2016 / Accepted: 13 July 2016 / Published: 18 July 2016
(This article belongs to the Special Issue Advances in Geopolymers and Alkali-Activated Materials)
Present 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
Keywords: geopolymer; admixtures; superplasticizers; workability; mechanical properties; porosity geopolymer; admixtures; superplasticizers; workability; mechanical properties; porosity
Show Figures

Figure 1

MDPI and ACS Style

Carabba, L.; Manzi, S.; Bignozzi, M.C. Superplasticizer Addition to Carbon Fly Ash Geopolymers Activated at Room Temperature. Materials 2016, 9, 586.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop