a polished concrete floor can be slip resistant in both wet and dry environments. in some cases they are more slip resistant than the resinous flooring systems. the slip resistance of polished concrete actually has a greater coefficient of friction cof than most coated floors considering a typical specification of polished concrete.
the method measures the coefficient of friction for two common footwear sole materials leather and neolite rubber on wet and dry surfaces. for litigation cases, the material from the actual shoe worn in the accident can be used in the test.--scott m. tarr skokie, ill.
shes referring to american national standards institute ansi a137.1 section 9.6.1 procedure for wet dynamic coefficient of friction dcof testing, which cpaa adopted in april as the slip-resistance measurement methodology for polished concrete.
coefficient of friction dcof values for polished concrete surfaces, using the test method in section 9.6 of ansi a137.1, american national standards specifications for ceramic tile. that standard specifies a minimum dynamic coefficient of friction of 0.42 for tiles in level indoor areas that may get wet in use. in 2015, cpc polishing contractors placed a 20 x 45 ft 6 x
coefficient of friction for polished concrete. polished concrete dcof during a six-month study at clemson university that ended in december 2014, a cpaa subcommittee tested three slabs using the ansi a-137.1 methodology. each slab was divided into 16 squares processed to replicate a different polished concrete category.
static friction is friction between two or more solid objects that are not moving relative to each other. for example, static friction can prevent an object from sliding down a sloped surface. the coefficient of static friction, typically denoted as s , is usually higher than the coefficient of kinetic friction.
polished concrete slip coefficient of friction flooring systems used on industrial and commercial floors should provide a safe walking surface by measuring the coefficient of friction cof , a quantitative number can be used to express the degree of slip resistance of a floor surface.
polished concrete floors1 is a generic term that describes a variety of exposed decorative concrete flooring options often having a highly polished or gloss surface finish. with the increasing popularity of these types of finishes the issue of providing adequate slip resistance has become an important consideration.
ansi a137.1. coefficient of friction cof describes the ratio f/w between the force necessary to cause an object to slide across a surface and the weight of the object. when the object begins at rest, the ratio is the static coefficient of friction. when the object is already in motion, it is the dynamic cof dcof .
leaving dirt at the door. in measuring the static coefficient of friction of a polished concrete floor, always maintain records of the test measurements, both from a visual gauge of your grinding and polishing and to eliminate or minimize punitive damages in light of a slip and fall in your office, or on your project.
ansi 137.1 dynamic coefficient of friction standard; the embedded etch slip resistant polished concrete; the risks of epoxy grout residue and the challenges of epoxy grout haze removal; surface solutions factory certified network
the most common method for testing decorative concrete, he says, is astm c-1028-96 standard test method for determining the static coefficient of friction of ceramic tile and other like surfaces by the horizontal dynamometer pull-meter method.
when asking 'what is coefficient of friction' in the concrete polishing industry, understand that coefficient of friction cof tests the slip resistance for accidents on any type of floor including commercial, industrial, and residential surfaces.
dr. sotter summarized some of the variables affecting slip resistance of polished concrete. when its clean and dry, he said, its normally not slippery. when wet, it might be. topical sealers can be a problem. sotter said, think about how an ice rink is made. a liquid, water, is spread on a surface, then solidified into ice.
it involves measuring dynamic coefficient of friction dcof using a trace of wetting agent sodium lauryl sulfate, or sls, an ingredient in many detergents in the water used for the testing. the standard establishes a minimum dcof of greater than 0.42 for level floors.
coefficient of friction in polished concrete. these coefficients vary according to the type of flooring. for instance, hard tiles require a different coefficient than Seven Trust floors. polished concrete is the newest of the flooring options, so required cof values have only just recently been established.
polished concrete slip coefficient of friction flooring systems used on industrial and commercial floors should provide a safe walking surface in both wet and dry conditions. by measuring the coefficient of friction cof , a quantitative number can be used to express the degree of slip resistance of a floor surface.
a most welcome surprise was the evidence that properly polished concrete is one of the safest flooring choices available to the consumer. this revelation came out of cpaa-sponsored field workshops where a battery of tests was performed, including measurements of dynamic coefficient of friction dcof .
affect installation of polished concrete floor system. 3.3 installation specifier notes: installation requirements of the polished concrete floor system will need to be determined for each project based on the following: 1. new or existing floor. 2. floor finish. 3. curing of floor. 4. condition of floor. 5. aggregate exposure desired. 6.
slip resistance guide for concrete surfaces. the most common method for testing decorative concrete, he says, is astm c-1028-96 standard test method for determining the static coefficient of friction of ceramic tile and other like surfaces by the horizontal dynamometer pull-meter method.