Long term permeation properties of different fly ash geopolymer concretes

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A Review of Recent Developments and Advances in Eco-Friendly Geopolymer Concrete (2020, background): “The durability of GPC can be determined by the properties like sorptivity, immersed absorption, water absorption, apparent volume of permeable voids (AVPV), chloride ingress, sulphate, or other acid attack [153].”
Effects of fly ash characteristics and alkaline activator components on compressive strength of fly ash-based geopolymer mortar (2018, background): “This is because the 111 nature of the reaction (geopolymerization) between the alkaline activator and the fly ash is 112 significantly different from the reaction (hydration) between the water and Portland cement 113 [36, 37].”
Clean production and properties of geopolymer concrete; A review (2020, background): “…of Al3+ in controlled Si/Al–Ca/Al or Si/Al–Na/Al ratios can positively influence the chemical stability and durability of the GeoPC matrix (Kamseu et al., 2016), and reduce the amount of sulfur trioxide (SO3) by less than 1%; thereby, ensuring high volume stability (Gunasekara et al., 2016).”