Influence of Curing Time and Initial Moisture Content on Metakaolin-Based Geopolymer-Stabilized Soft Soil

Table 2

Chemical composition and physical properties of metakaolin.

Compounds	wt%
SiO2	50.00 ± 1.0
Al2O3	45.00 ± 1.0
Fe2O3	0.50 max.
TiO2	1.00 max.
CaO	0.50 max.
MgO	0.40 max.
K2O + Na2O	0.55 max.
Physical properties	Results
Whiteness (ISO), %	89 ± 1.5
Brightness, %	87 ± 1.6
pH	5.5–7.0
Specific gravity	2.6
Oil absorption (g/100 g)	53 ± 5
Grain distribution	—
Sieve balance + 45 µm, %	0.004 max.
D50 µm	4–5
D90 µm	22–23
D98 µm	39–40