What is the British pendulum test?
The British pendulum test is commonly used to measure low-speed pavement friction and provide a measure of the quality of pavement surface micro-texture in terms of skid resistance contribution. Generally, it is considered an empirical test, and the measured British Pendulum Number (BPN) taken as an index value.
How is slip resistance measured?
Slip resistance is measured in Coefficient of Friction (COF), which is equal to the ratio between the maximal frictional force that the sole of the shoe exerts and the force pushing the sole across the surface.
What is British pendulum number?
A BPN rating stands for British Pendulum Number and is an important measure of how your flooring will perform under wet conditions.
What is the slip resistance test for epoxy floorings are conducted using?
Flooring is tested using a tribometer (floor slip resistance tester) to discover if there is a high propensity for slip and fall accidents on it, either dry and/or (most often) when wet with water or lubricated with other contaminants such as kitchen grease, hydraulic oil, etc.
What is pendulum test value?
The height to which the shoe travels after contacting the floor gives a reading of the Pendulum Test Value (PTV), formally known as the Slip resistance Value (SRV). All testing is carried out in both dry and wet conditions as is intended to give a representative view of the floors intended service conditions.
What is pendulum impact tester?
Pendulum Charpy/Izod Impact Testing is a high strain-rate test to determine the amount of energy absorbed by a material during fracture. The Impact tester involves a pendulum of known mass and length which is dropped from a known height to strike an Impact Specimen.
What is slip coefficient?
The slip coefficient, ks, is defined to be the ratio of the force causing slip at the contact surface to the normal force between the plates resulting from bolt tension.
What is skid number?
Instrumentation measures the friction force acting between the test tire and the pavement and reports the result as a Skid Number (SN).
What is sand patch test?
This test method is used to assess the surface texture depth (the average depth of voids below the high points of the surface) of a road surface. Earlier versions of this test method have used either graded sands or glass beads used in linemarking, and have traditionally been known as the ‘sand patch’ method.
What is pendulum test?
The pendulum test assesses the friction offered by a floor surface when a foot comes into contact with it. It can measure slip potential of both dry, wet and contaminated flooring.
What is pendulum testing?
What is the difference between Charpy and Izod impact test?
The Izod impact testing holds the sample vertically with the notch facing the pendulum. The Charpy impact testing holds the sample horizontally with the notch facing away from the pendulum.
How does a pendulum friction tester work?
A pendulum-type friction-tester is assembled from a frame and a weight, with a device to fix the specimen and a supporting base (Figure 2 ). The friction measurement involves two circular surfaces that are slid across each other during the free libration of the pendulum frame.
How does the pendulum slip test work on a floor?
Wet Pendulum Slip Ratings AS 4586 Appendix A The wet pendulum slip test outlined in Appendix A of AS 4586 classifies the slip rating of surfaces that are prone to water contamination. The floor surface is tested using a Pendulum Friction Tester, where the individual measurements is the British Pendulum Number (BPN).
What is the COF of a pendulum test?
In the lower range the COF is 0.01 x PTV (or BPN): in other words, for PTV (BPN) = 31, COF = 0.31. In the higher range, for historical reasons the two diverge. At PTV = 50, COF = 0.54, and at PTV = 82, COF = 1.00.
How does the dry floor friction test work?
Divide the lot into lots of different smaller lots and then re-test to apply a slip rating to each of the smaller lots. AS 4586-2013 Append B is the Dry Floor Friction Test (FFT) which provides the slip ratings of surfaces that are intended for mainly internal floors that are away from potential contaminants.