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International Journal of Concrete Structures and Materials

Table 7 Analysis of variance for compressive strength.

From: Characterization and Early Age Physical Properties of Ambient Cured Geopolymer Mortar Based on Class C Fly Ash

Source

Sum of squares

Degrees of freedom

Mean squares

F ratio

p (significance)

NaOH:fly ash ratio

3,271.01

3

1,090.34

196.48

<0.01

Na2SiO3:fly ash ratio

1,252.84

3

417.61

75.25

<0.01

NaOH × Na2SiO3

182.93

9

20.33

3.66

<0.01

Error

177.58

32

5.55

–

–

Total

4,884.36

47

–

–

–

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