Geopolymer concrete sulphate resistance
MetadataShow full item record
Geopolymer concrete is a concrete consisting of non-cement based binder, in the case of this research, the binder was fly-ash activated with sodium silicate and sodium hydroxide. Geopolymer concretes may offer sustainability advantages due to their use of by-products and replacement of cement. Research is required on their structural, mechanical and chemical properties. This research analyzed the effect of different curing regimes and exposure regimes on the sulphate resistance of geopolymer concrete. Geopolymer concrete cylinders that had been steam cured at different temperatures were exposed to a 10% concentrated sodium sulphate solution for one or two months in either fully submerged or partially submerged conditions. Control specimens were not exposed. Precipitate formation occurred on the partially submerged specimens. It was observed that only mass gains occurred in the exposed specimens. XRD indicated no expansive by-products had formed from the exposure and compressive strengths remained unchanged throughout the exposure period. Curing temperature affected the initial rate of strength gain but did not have an impact on the sulphate resistance of the geopolymer concrete.
Showing items related by title, author, creator and subject.
Deb, Partha; Nath, Pradip; Sarker, Prabir (2013)Inclusion of ground granulated blast furnace slag (GGBFS) together with fly-ash can have significant effects on the development of strength and durability properties of geopolymer concrete when cured at normal temperature. ...
Shaikh, Faiz (2014)This paper presents chloride induced corrosion durability of reinforcing steel in geopolymer concretes containing different contents of sodium silicate (Na2SiO3) and molarities of NaOH solutions. Seven series of mixes are ...
Sarker, Prabir; Nath, Pradip (2014)Recent studies have shown that the properties of emerging low-emission geopolymer binders are similar or superior to those of the OPC binder traditionally used for concrete. Most of the previous studies in literature ...