Improved Reactivity of Fly Ash-Slag Geopolymer by the Addition of Silica Fume

Table 6

Element dissolution concentrations of raw silica fume in NaOH solution (mg/L).

Sample ID	Time	Si	Al	Ca	S
Silica fume 1	24 h	169.4	2.895	0.183	6.087
	48 h	185.3	2.779	0.162	5.535
Silica fume 2	24 h	119.9	2.479	0.521	2.990
	48 h	136.6	2.413	0.175	1.329