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This guide describes the procedures for evaluating and calibrating friction measurement systems known as Continuous Friction Measuring Equipment (CFMEs) using the specialized equipment, instruments, pavement surfaces, trained personnel, and approved facilities. It serves as a process to identify and quantify the variables that affect system performance, to minimize the effect of these variables, and to provide a means to relate CFMEs to reference skid measurement systems. The standard covers the apparatus to be used in evaluation and calibration, physical measurements, static force evaluation and calibration, tire pressure gauge calibration, speed and distance calibration, slip ratio or yaw angle verification, water flow and distribution, force plate calibration, final testing and reporting, documentation, reporting of results, and frequency of system correlation and calibration.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This guide describes the evaluation and calibration of friction measurement systems which are known as Continuous Friction Measuring Equipment (CFMEs). The evaluation, and calibration processes; using the specialized equipment, instruments, pavement surfaces, trained personnel, and approved facilities; are performed using the procedures described below.
1.2 This guide is offered as a process to identify and quantify the variables that affect system performance, to minimize the effect of these variables, and to provide a means to relate CFMEs to reference skid measurement systems.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section 7 on Hazards.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
E556 Test Method for Calibrating a Wheel Force or Torque Transducer Using a Calibration Platform (User Level)
E670 Test Method for Testing Side Force Friction on Paved Surfaces Using the Mu-Meter
E867 Terminology Relating to Vehicle-Pavement Systems
E1859 Test Method for Friction Coefficient Measurements Between Tire and Pavement Using a Variable Slip Technique
E1960 Practice for Calculating International Friction Index of a Pavement Surface
E2340 Test Method for Measuring the Skid Resistance of Pavements and Other Trafficked Surfaces Using a Continuous Reading, Fixed-Slip Technique
E2666 Practice for Correlations of Mu Values of Continuous Friction Measurement Equipment to Determine Maintenance Levels for Use at Airports
F377 Practice for Calibration of Braking/Tractive Measuring Devices for Testing Tires
F457 Test Method for Speed and Distance Calibration of Fifth Wheel Equipped With Either Analog or Digital Instrumentation
ICS Number Code 93.080.20 (Road construction materials)
UNSPSC Code 60104605(Friction apparatus)