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A.S.T.M. C-744 Specifies the following tests for prefaced glazed concrete
masonry units
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| Cracking and Crazing |
A test to ensure that the units are free from cracking and/or crazing. |
Complies |
| Resistance to Staining and Chemicals |
Testing of various chemical, i.e., detergents, solvents, etc., in concentrations
set by ASTM standards and A.S.T.M. requirements. |
Complies |
| Adhesion |
A test to determine the adhesion of the glazed facing to the block substrate. |
Complies |
| Abrasion |
A test to measure the abrasion resistance of the glazed facing. |
Complies |
| Flame Spread Index† |
A test to determine how much the glazed facing will allow flame to spread
in a fire. |
Complies |
| Smoke Development†† |
A test to determine the amount of smoke given off by the glazed facing
in a fire. |
Complies |
| Color Change |
A test by accelerated weathering apparatus to measure color fading or
change. |
Complies |
| Soiling and Cleansability |
A test to determine how easily the glazed surface can be cleaned. |
Complies |
| Efflorescence |
A test to ensure that unsightly soluble salts do not migrate to the surface
when moisture is present. |
Complies |
| Dimensional Tolerances |
A test to ensure that variations in the sizes of the blocks in all dimensions
are less than 1/16". |
Complies |
| Face Variation |
A test to ensure that the glazed facing dimensions do not vary more than
1/16". |
Complies |
| Depth Variation |
A test by measurements to ensure that the thickness of the prefaced block
are within 1/16" of the specified size. |
Complies |
| Distortion of Facing |
A test by measurements to ensure that the glazed facing is straight,
true, and in plane within 1/16". |
Complies |
| Surface |
A laboratory inspection for quality of the face (no imperfection). |
Complies |
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A.S.T.M. C-90 Specifies the following tests for load-bearing concrete
masonry units
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| Compressive Strength and Moisture Absorbency |
A test to ensure that blocks meet strength and moisture requirements,
and are free of cracks and other defects. |
Complies |
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Canadian Standard CSA-CAN3-A165.3-M85
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| Aging and Thermal Shock |
A test to ensure that no cracking, spalling, crazing, or blistering of
the glaze occurs when the unit is subject to cycles of thermal shock, at
0? and 93? C. |
Complies |
| Other Tests: |
| Freeze/Thaw Test |
A test to ensure that the glazed facing does not crack or craze when exposed
repeatedly to freeze thaw cycles. |
Complies |
| Acid Rain Test |
A test to ensure that acid rain does not mar the face of ASTRA-GLAZE-SW®+
blocks. |
Complies |
| Diesel Fume Exhaust Test |
A test to measure the effect of prolonged diesel fume exhaust on the facing
of ASTRA-GLAZE-SW®+ blocks. |
Complies |
| Waste Water Treatment Plant Test |
A test to ensure that the glazed facing is not affected by affected by
chemicals found in waste water treatment plant environments. |
Complies |
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ASTRA-GLAZE-SW®+ units meet USDA approval
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†The test method specified in ASTM E-84 is used to determine surface
burning characteristics.
††In this test, red oak is given a value of 100 and asbestos cement
board is given a value of 0 to calibrate the test equipment.
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Industry-Specific Testing
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Industry-specific certificate of analysis testing has been completed
for ASTRA-GLAZE-SW®+ glazed masonry units by Froehling and Robertson,
Inc. Laboratories. ASTRA-GLAZE-SW®+ units successfully pass chemical
and medical agents, steam, fuel, and detergent testing in:
- Veterinary Hospitals & Clinics
- Animal Shelters
- Power Plants
- Machine Shops
- Heating Plants
- Control Labs
- Brewing & Distilling Industries
- Wash Rooms & Showers
- Laundry Rooms
- Dairy Industry
- Jails
- Meat Packagers
- Slaughter Houses
- Seafood Industries
- Kitchens & Food Preparation Facilities
- Dish Washing Bars
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