~ Bamboo Flooring Test Report ~
Tech Center
1MPa=145PSI=10.2kg(f)/cm2=10bar=9.8atm
Hardness (Janka Ball Test):
When tested according to the standards of the National Wood Flooring Association Test (Janka Ball Hardness Test), it shows an average hardness of 1320 PSI, which is comparable with Northern Red Oak. The carbonization process reduces the result to 1010 PSI, or approximately the strength
of walnut.
Basic Density: 0.766g/cm3
Air-dry Density: 0.819g/cm3
Moisture content:
6 to 9%
Dimensional Stability:
Bamboo flooring produced a dimensional change coefficient of .00144 making it more than 2.5 times more stable than commonly used wood flooring.
Compressive Strength:
Testing to ASTM 3501-86 A produced:
Compression parallel to grain: 7600 PSI
Compression perpendicular to grain: 2624 PSI
Modulus of Elasticity (MOE, Stiffness): 8.4GPa
This is the measurement of stiffness
that determines the deflection from a load. An example
would be boards on a floor. They will recover to their
original shape from a stress up to the proportional limit*,
but when stressed beyond this point, a permanent set will
remain.
The Modulus of Elasticity is not a force
number, but a ratio of the stress applied up to the
proportional limit divided by the strain (the deflection over
a given area). In simple terms: take the force of
7200 PSI and divide it by the amount of deflection over a
given area (.0050 in.) and you have a MOE of 1.44. The higher
number on the chart indicates greater stiffness.
*PROPORTIONAL LIMIT is a term to
describe a point where the strength of the wood and the load
are even. When stressed beyond this point, structural
damage will occur.
Modulus of Rupture (MOR, Bending
strength): 170.6MPa
This measurement shows the maximum
bending load that a board can support. The number
indicates the stress required to cause failure. The
higher number means that a greater force is required to cause
failure.
Shearing Strength of Gluing Line: 155.8kgf/cm2
Holding of Screw, Longitudinal Section: 149.60kgf
Holding of Screw, Cross Section: 136.80kgf
Water Absorption, pert. (26C, 24 Hr.): 11.80%
Water Absorption, Swelling (26C, 24 Hr.):
0.23%
Shrinkage after drying, parallel to fiber
(Radial):
0.028%
Shrinkage after drying, perpendicular to
fiber (Chord):
Shrinkage after drying, thickness:
0.308%
Impact Strength: 1.16kgf.m/cm2
Flammability:
When tested according to ASTM E648 Critical Radiant Panel Test, Bamboo passed with a Class 1 rating per NFPA "Life Safety Code". This means that Bamboo flooring can be used in all classes of buildings.
Smoke Density:
When tested according to ASTM E622, Bamboo passed with a 269 flaming mode and a 329 non-flaming mode. A passing score was 450 or less.
Tensile Strength:
Testing to ASTM 3500-90 A yielded results of 15,300 PSI parallel to grain.
Abrasion Resistance:
When tested according to ASTM C501, the weight loss was only .012 ounces (.349 grams). The test utilized H-22
calibrate wheels loaded with 1000-gram weights at 70 RPM for 1000 cycles.
Chemical and Stain Resistance:
When tested with the following chemical reagents finish, Bamboo was unaffected:
Acetic Acid (5%) Ethyl Alcohol (50%)
Ammonium Hydroxide (10%) Hydrogen Peroxide (3%)
Acetone Soap Solution (1%)
Detergent Solution Turpentine
Heavy Duty (.025%) Toluene
Sodium Hydroxide (1%) Hydrochloric Acid (10%)
Slip Resistance:
When tested according to ASTM D2047, Bamboo was rated as slip resistant per the Americans with Disabilities Act.
Formaldehyde:
0.0127ppm (European standards for formaldehyde = 0.124 mg/m3 (About .13 ppm)
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