The morphology of CSH formed in GBFS-NC9
blend differed from that formed in case of GBFS activated by
sodium hydroxide. This is mainly due to different Ca
2+
/Si
GBFS-NC9 as a result of relatively lower CC
/SH ratio in dry
activator (NC9) of mix G which leads to the dissolution of
activated species (Al
3+
,Si
4+
and Ca
2+
) is sufficient for the
formation of geopolymer and hydrated product (CSH), thus,
producing a very compact structure