Fig. 8b shows TGA and DTG thermograms for GBFS activated by sodium hydroxide (I), GBFS-NC9 (G), GBFS-NC14
(B) and GBFS-NC19 (H) after 28 days in 100% RH. The
weight loss of GBFS-NC9 (G) paste (16.51%) is greater than
those of GBFS-NC14 (B) paste, GBFS-NC19 (H) paste and
GBFS activated by sodium hydroxide (I) (12.95 and 14.05,
10.18%), respectively. This is due to that the amount of
CSH formed in GBFS-NC9 (G) paste is greater than those
of GBFS-NC14 (B) and GBFS-NC19 (H) pastes. Although
the CSH formed in GBFS-NC19 (H) blend is lower than those
formed in GBFS-NC14 (B) paste or GBFS activated by
sodium hydroxide (I), the weight loss for GBFS-NC19 (H)
paste is greater than those of GBFS-NC14 (B) paste or GBFS
activated by sodium hydroxide (I).