Compressive strength of geopolymer concrete cured in hot air oven (100°C) and steam chamber (75°C).
Mix ID
Mixture proportions
B/AG ratio
F/C ratio
AC/B ratio
Water (lit/m3)
NaOH (kg)
Na2SiO3(kg)
Compressive strength (MPa)
Hot air oven (100°C)
Steam chamber (75°C)
1st day
3rd day
7th day
14th day
28th day
1st day
3rd day
7th day
14th day
28th Day
GC1
1 : 0.63 : 1.63
0.44
0.38
0.3
216
103.68
0
21.4
21.7
23.3
23.5
28.2
18.6
22.3
23.4
24.4
28.9
GC2
1 : 0.63 : 1.63
0.44
0.38
0.3
216
69.12
103.68
19.8
22.7
23.8
27.7
29.2
24.4
24.6
24.4
27.4
29.3
GC3
1 : 0.9 : 1.84
0.36
0.49
0.3
180
86.4
0
25.5
29.5
31.5
34.5
35.3
32.7
32.9
33.3
34.9
37.9
GC4
1 : 0.9 : 1.84
0.36
0.49
0.3
180
57.6
86.4
24.7
25.6
26.2
27.2
30.6
16.9
25.5
26.8
28.5
29.6
GC5
1 : 1.43 : 2.31
0.27
0.62
0.3
144
69.12
0
23.2
27.2
27.7
33.4
35.6
36.7
40.8
43.6
46.6
56.6
GC6
1 : 1.43 : 2.31
0.27
0.62
0.3
144
46.08
69.12
21.9
24.6
26.7
29.8
33.6
23.3
25.6
27.4
28.1
31.8
Note: AC/B—activator to binder ratio; test results denote an average of 5 concrete specimens tested with standard deviation of 5.11 and the coefficient of variation around 0.153.
