Charleston
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Description - Putnam Gneiss
Color - Light gray
Physical Properties
ASTM
Description
Data
ASTM C 170-06
Compressive Strength
9,895 psi
ASTM C 97-02
Absorption and bulk specific gravity
0.995% and 2.65
ASTM C 99-87
Modulus of Rupture
2,795 psi
ASTM C 67-07a
Freezing and Thawing
<1.0% loss