Table 1 Technical specification of sodium metasilicate and aluminum oxide (as received).

From: Production, characterization and performance of green geopolymer modified with industrial by-products

Specification

Sodium metasilicate (Na2SiO3)

Aluminum oxide (Al2O3)

Appearance

White, uniform, beaded powder

White, powder

Molecular weight ,g

122.69

233.00

Bulk density , g/cm3

0.85–0.95

3.98 ± 0.02

Solubility

Soluble in water

Insoluble in water

Degree of polymerization

75–95%

1000 ± 50

Melting point °C

71

2,072

Particular size (14–40 mesh) by wt %

90

66

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