Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4918175 | Construction and Building Materials | 2017 | 8 Pages |
Abstract
The present study investigated the microstructural and compositional formations of the gel phase in MgO-incorporated geopolymer exposed to a high CO2 concentration. Samples were synthesized by the alkali-activation of fly ash with different dosages of MgO. The results showed that a higher level of MgO incorporation into a geopolymer exposed to a CO2-rich environment decreases the porosity, corresponding to an increase in the compressive strength. Furthermore, the microstructural densification of geopolymer caused by the formation of Mg-bearing hydrate was observed, and this may have important implications for use in high-CO2 conditions by reducing the diffusivity of CO2 through the pore structure.
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Authors
J.G. Jang, S.M. Park, G.M. Kim, H.K. Lee,