PROPERTY

RESULT

Set Time

 >30 minutes (ASTM C10);
Faster set than Portland cement,
Much faster than hydraulic lime

Compressiv e Strength

Minimum 1020 psi (7 MPa) @ 28 days (1:1 with test sand)
Lower initial strength than Portland cement,
Comparable strength to Lime/Portland Blends and Hydraulic Lime

Modulus of Elasticity

Typically 535,000-640,000 psi
Lower than stone, brick, Portland cement (See chart, below)

Modulus of Rupture

Typically 400-600;
Lower than stone, brick, Portland cement (See chart, below)

Fineness

Fineness specifications for traditional cements became increasingly stringent over time. Today there is no fineness requirement, only a minimum 28-day strength requirement. Typically a minimum of 70% passes a 200 mesh sieve.

Tensile Strength

Traditional Specifications required a minimum of:
38-70 psi @ 24 hours (neat)
87-134 psi @ 7 days (neat)
162-237 psi @ 28 days (neat)
34-50 psi @ 7 days (1:2 w/sand)
75-80 psi @ 28 days (1:2 w/sand)
There is no current requirement.

Adhesive Bond Strength

CROTON BRICK
Neat Cement: 68 psi
1:1 Cement/Sand: 40 psi
1:2 Cement/Sand24 psi

FINE CUT GRANITE
Neat Cement: 27.5 psi
1:1 Cement/Sand: 20.8 psi
1:2 Cement/Sand12.0 psi

NOTE: These values are higher than results for  lime and Portland cement.