Minimising the global warming potential of clay based geopolymers

By Andrew Heath, K. Paine, Marcelle C. McManus. 2014

331 citations recorded by the source corpus.

Production of Portland cement (PC) binders contributes substantially to global CO2 production and various bodies including the Intergovernmental Panel on Climate Change (IPCC) have identified geopolymers as alternative binders with the potential to reduce these emissions. The hypothesis of this research is to investigate whether this is a realistic proposition in the light of limited waste materials such as fly ash and ground granulated blast furnace slag commonly used as geopolymer precursors. The effect of use of natural clay minerals as alternative precursors on global warming potential (GWP) is investigated. Methods of designing mixes with the lowest possible GWP are presented and these are compared to the GWP of PC and currently available metakaolin based geopolymer binders. It is concluded that it is possible to reduce the GWP by approximately 40%, but other impacts may increase.

Subfields: Building and Construction, Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/241ace630790fb51835c78a7bc5461f08b6e3996

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In Building and Construction

In Civil and Structural Engineering

In Materials Chemistry

Citations in the corpus

Recent update on the environmental impact of geopolymers (2016, background): “Data are coming from: [32]; [26]; [30]; [31].”
One-part alkali-activated materials : a review (2018, background): “[186] reported that GWP per mole is two times lower for sodium hydroxide than for sodium silicate, but as Ha-”
A Review of Recent Developments and Advances in Eco-Friendly Geopolymer Concrete (2020, background): “For example, the binder that requires high amount of sodium silicate has higher impact of GWP [216,221].”
Comparison of alkali and silica sources in one-part alkali-activated blast furnace slag mortar (2018, background): “However, of the raw materials, alkali silicates are the most expensive and have the highest environmental impact (Heath et al., 2014).”
Sulfate and acid resistance of lithomarge-based geopolymer mortars (2018, background): “[53] anticipated that current global production of fly ash and slag cement meets only 20% of PC demand and will most likely fall below 10% by 2050.”