ASTM D Standard Test Method for Static Coefficient of Friction of Polish- Coated Flooring Surfaces as Measured by the James Machine. Jan 5, The ASTM E slip resistance test standard defines the British pendulum . ASTM D is the basis of the testing of floor “waxes” (floor. Oct 31, ABIC Testing Laboratories, Inc. was authorized to test the following samples of metal floor panels for static coefficient of friction (SCOF).
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This is the static coefficient of friction SCOF.
Static Coefficient of Friction Measurements
Safety on flooring and ramps is one of the most common reasons for concern about the static coefficient of friction. There are manufacturing process reasons as well, such as stamping.
This physical parameter for electrical connection materials and some mechanical connections is also important. We have made a number of custom SCOF measurements for such applications. Walkway traction and the avoidance of slippage has led to a number of standards regarding the recommended static coefficient of friction for the materials used in flooring tiles, polished or painted wood surface flooring, highly textured ramp surface materials, cement walkways, bathroom floors, and pool and patio deck coatings.
Walkway materials which are occasionally wet or normally wet are to have a wet surface SCOF greater than or equal to 0.
Slip Resistance Testing Standards in 2018
However, when a surface is very rough, the decrease in traction may be very little when wet and for some very carefully engineered surfaces awtm may even be higher. Some materials also become more pliant when wet and this may cause an increase in the SCOF value. Anderson Materials Evaluation, Inc. The meter itself provides the applied weight on a horizontal surface sstm the material to be tested.
The meter has three feet which are Neolite for standard slippage testing purposes.
ASTM Standards/Tests for Coefficient of Friction | SlipNOT®
Satm Neolite is called the sensor. Other sensor materials may be substituted for the Neolite for specialized testing.
Measurements can be made in accordance with the following standards, except that the contact area and the applied weight may differ:. We do not recommend its use. We do not perform this measurement.
The above standards require measurements of the SCOF in each of four orthogonal directions. The average value is then used to determine xstm the SCOF is adequately high for a safe walking surface.
It should be noted that some surfaces have a strong directional dependence on the SCOF. A surface with an adequate average may actually have an unsafe SCOF in a particular direction.
A recent example of this measured in this laboratory was for decking and wharf planks which had a much lower SCOF along the plank length than f2047 the plank width. The static coefficient of friction depends both upon the chemistry of the surfaces and the morphology of the surfaces. AME is able to investigate these surface properties in detail so that insight is gained into the reasons that given surface combinations have the friction properties they have and so that improvements in those properties may be achieved.
We provide Asfm analysis of surfaces so that the elemental and chemical composition of the surface in immediate contact with the sensor or opposing material is well-characterized.
Testing the Safety of Polished Floors | ASTM Standardization News
We can also examine surfaces with FTIR spectroscopy to characterize polymeric material surfaces. In many cases, material surfaces have different local compositions than do the interior of the materials and it is the surface composition, along with the surface topography, which plays the critical role in determining the SCOF. Optical microscopy and SEM are available to better examine and document the topography or roughness characteristics of a surface.
These surface characterizations are very d20447 in engineering a higher traction surface.
Of course, for other applications there are cases in which one desires a more slippery surface and these additional surface characterizations are useful then as well. A high traction rough surface with large scale roughness due to large sand particles is shown in a macro photograph.
The colored UV coating is filled with complex silicates, calcium sulfate, and carbonate fine particles which provide a shorter-range roughness for this walking surface. A mineral particle in the high traction surface above using Nomarski differential phase contrast microscopy with a very irregular shape and a very high surface area provides surface roughness on a very fine scale.
This surface then has roughness on three scales and has the unusual property of having an even higher SCOF when wet than when dry. Measurements can be made in accordance with the following standards, except that the contact area and the applied weight may differ: Direct questions and comments to contactus andersonmaterials.