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

Table 2

Mix proportion of fly ash-slag geopolymer paste.

Sample	Water/binder	AA/water	SF/(FA + BFS + SF)	FA/BFS
C	0.38	0.20	0	1.0
SF1-10	0.38	0.20	0.10	0.8
SF1-20	0.38	0.20	0.20	0.6
Z10	0.38	0.20	0.10	0.8
HFA	0.38	0.20	0	1.0
SF1-10S	0.38	0.20	0.10	1.25
SF1-20S	0.38	0.20	0.20	1.67
Z10S	0.38	0.20	0.10	1.25
SF2-10	0.38	0.20	0.10	0.8
SF2-20	0.38	0.20	0.20	0.6
SF2-10S	0.38	0.20	0.10	1.25
SF2-20S	0.38	0.20	0.20	1.67

AA indicates the alkaline activator with SiO₂/Na₂O ratio of 0.97.