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

Table 3

Reactivity calculated from insoluble Si or Na element content of powder sodium silicate in distilled water (%).

Sample ID	Na	Si	Ca	Al
C	45.1	95.7	87.6	96.4
SF1-10	40.5	89.1	95.2	100
SF1-20	48.7	90.1	98.2	100
Z10	56.9	94.9	90.1	97.6
HFA	52.2	95.5	88.6	96.1
Z10S	60.1	92.4	87.4	96.8
SF2-10	65.5	94.7	91.2	97.7
SF2-20	65.8	90.8	94.6	100
SF2-10S	65.2	92.2	88.7	97.1
SF2-20S	64.4	90.9	97.0	100

Insoluble Al and Ca contents (%) mean the percentage of the insoluble contents into the distilled water to the total Al and Ca contents in the geopolymer sample, respectively.