Abstract
The present chapter discusses the main factors affecting the compressive strength of geopolymers produced from low-calcium ferronickel slag, namely paste composition, activator concentration, pre-curing, thermal conditions and presence of additives. Durability and structural integrity of geopolymers immersed in various aquatic and acidic solutions or subjected to freeze-thaw cycles over a period of 9 months as well as to high temperature heating are also investigated. XRD, SEM, FTIR and TG were used to identify new phases and subsequently elucidate to a certain extent the mechanisms involved.
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