When high- strength BFS and fly ash composite cement
were mixed with water, clinker minerals hydrated first and
released calcium hydroxide. Water phase was saturated by
calcium hydroxide. Then the glass phase of BFS and fly ash
reacted with alkalis, and led to Si±O±Si, Al±O±Al links,
etc. ruptured. It depolymerized to produce SiO4
4ÿ
, AlO4
5ÿ
,
Ca2+, etc., which went into the solution and formed new
hydrated calcium silicate and hydrated calcium aluminate.
The latter went on to react with SO4
2-
dissolved from
gypsum, and derived AFt. In addition, hydro-grossularite,
etc., hydrates were produced. The more amounts of mixed
materials, the lower the clinker content, and the lower the
alkalinity would be reduced to. The decomposing reaction
of the glass phase network for BFS and fly ash would be