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. 2025 May 21;15:17633. doi: 10.1038/s41598-025-01461-w

Table 1.

Geopolymer ingredients, and the mix design.

Sample MK (g) SiO2 Al2O3 Partially de-Aluminated metakaolin SiO2 Al2O3 Total
SiO2
Total Al2O3 		NaOH (g) Water (g) Average Compressive Strength (MPa) Molar ratio
SiO2/Al2O3
“Source of Silica” (g)
#1 280

116.8

1.95 M

98

0.96 M

 264

167.1

2.78 M

16.4

0.16 M

4.73

1.12

 140 126 21 4.2
#2 330

137.6

2.29 M

115.5

1.13 M

 205

129.8

2.16 M

12.7

0.125 M

4.45

1.26

 165 110 28 3.5
#3 377

157.2

2.62 M

132

1.29

 151

95.6

1.59 M

9.4

0.092

4.21

1.38

 188 95 43 3.05
#4 425

177.2

2.95 M

148.8

1.46 M

 94

59.5

0.99 M

5.8

0.057 M

3.94

1.52

 212 80 32 2.6