5837-5 - Skid Resistance Evaluation (Slides of the...

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1 Skid Resistance Evaluation (Slides of the equipment were provided by FDOT Pavement Evaluation Group) Why Do We Need to Evaluate the Skid Resistance of Pavements? To Prevent Skid Related Accidents There are about 42,000 fatalities on the road in the U.S. each year. TEST METHOD: ASTM E 274-97 • STANDARD TEST METHOD FOR SKID RESISTANCE OF PAVED SURFACES USING A FULL-SCALE STANDARD TIRE. • REPRESENTS STEADY STATE FRICTION FORCE ON A LOCKED TEST WHEEL AS IT IS DRAGGED OVER A WETTED PAVEMENT SURFACE UNDER CONSTANT LOAD AND AT A CONSTANT SPEED TEST RESULT REPORTED: FRICTION NUMBER FN = (F/W) X 100 where F = HORIZONTAL FORCE W = DYNAMIC VERTICAL LOAD TEST APPARATUS THE TEST APPARATUS CONSISTS OF AN AUTOMOTIVE VEHICLE WITH ONE OR MORE TEST WHEELS INCORPORATED INTO IT OR FORMING PART OF A SUITABLE TRAILER TOWED BY A VEHICLE. THE APPARATUS CONTAINS A TRANSDUCER, INSTRUMENTATION, A WATER SUPPLY AND PROPER DISPENSING SYSTEM, AND ACTUATION CONTROLS FOR THE BRAKE OF THE TEST WHEEL
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2 Friction Testers
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This note was uploaded on 05/26/2011 for the course TTE 5837 taught by Professor Staff during the Spring '11 term at University of Florida.

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5837-5 - Skid Resistance Evaluation (Slides of the...

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