Physical and chemical properties of geopolymer cements
Geopolymer cements

Shrinkage during curing: < 0.01%, non-quantifiable (figure 10)

Compressive strength (uniaxial) : > 90 MPa at 28 d (for high-strength initial formulation, 20 MPa after 4 h; figure 11)

Flexural strength: 10-15 MPa at 28 d (for high initial strength 4 MPa after 24 h)

Young's modulus: > 2 GPa

Freeze-thaw: mass loss < 0.1% (ASTM 4842), strength loss < 5% after 180 cycles

Wet-dry: mass loss < 0.1% (ASTM 4843)

Leaching in water: after 180 d K₂O < 0.015%.

Water absorption:...