Compression Strength ASTM-C 170

Sample Dry (avg. psi) Wet (avg. psi)
Pearl 13149 10758
Rose 11283 9905
Walnut 9755 7866
Oxford 9193 6669
Ice 8827 6932
Tahoe 7927 6480
Gold 5579 3604
Capril 6120 6680
Portofino 9382.8 8947.1
Silver 6934 5700.3

The Compressive Strength test indicates the maximum load per unit area, expressed in MPa or Psi, that a cubic specimen is able to withstand before yielding when compressed on two opposite surfaces (rarely is the test carried out on the opposite surfaces of a cylindrical sample). The resistance to this type of stress will vary depending on whether the sample is completely dry (Dry) or fully saturated in water (Wet). Another factor that greatly influences the resistance of the material to compression is the direction of the load in relation to the bedding (rift) planes, if present.

The test provides useful information on the behavior of the stone material in relation to stresses due to structural loads (e.g. columns) or small surfaces subjected to large loads.

The standard requires a“Dry” conditioning temperature of 60 °C and a complete immersion for “Wet” conditioning of at least 48 hours. A minimum of five specimens, typically 50x50x50mm in size, are required for each of the possible conditioning-direction of the load combinations.

Co-Efficient of Friction ASTM-C 1028

Sample
Size
CF Dry
CF Wet
Result
Tumbled Pearl
8”X8”
0.64
0.71
PASS
Tumbled Rose
8”X8”
0.64
0.70
PASS

Tumbled Walnut
8”X8”
0.66
0.68
PASS

Tumbled Oxford
8”X8”
0.70
0.73
PASS
Tumbled Ice
8”X8”
0.69
0.68
PASS
Tumbled Tahoe
8”X8”
0.70
0.67
PASS
Tumbled Gold
8”X8”
0.71
0.66
PASS
Capril
8”X8”
0.65
0.66
PASS
Portofino
8”X8”
0.69
0.71
PASS
Silver
8”X8”
0.64
0.75
PASS

Co-efficient of friction is defined as “the force causing a body to slide along a plane (in the direction of sliding) to the normal force pressing the two surfaces together.” Coefficient of friction has to be measured experimentally; it cannot be measured using formulasThe ASTMC1028 test is run with the HPS (Horizontal Pull Slipmeter). The HPS measures both static and kinetic coefficient of friction. The HPS is compromised of a large pad and 50 pounds of weight that is hand pulled across tiles to measure slip resistance. .

Freeze / Thaw ASTM-C 6666

Sample
Cicles
Result
Tumbled Pearl

125

No evidence of cracks or defects present
Tumbled Rose 125
No evidence of cracks or defects present

Tumbled Walnut
125
No evidence of cracks or defects present

Tumbled Oxford
125
No evidence of cracks or defects present
Tumbled Ice 125
No evidence of cracks or defects present
Tumbled Tahoe 125
No evidence of cracks or defects present
Tumbled Gold 125
No evidence of cracks or defects present
Capril 125
No evidence of cracks or defects present
Portofino 125
No evidence of cracks or defects present
Silver 125
No evidence of cracks or defects present

This test method covers the determination of the resistance of listed specimens to rapidly repeated cycles of freezing and thawing in the laboratory by two different procedures:

  • Procedure A, Rapid Freezing and Thawing in Water, and
  • Procedure B, Rapid Freezing in Air and Thawing in Water. Both procedures are intended for use in determining the effects of variations in the properties of the listed specimens on the resistance of the specimens to the freezing-and-thawing cycles specified in the particular procedure. Neither procedure is intended to provide a quantitative measure of the length of service that may be expected from a specific specimen.