Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ASTM E503/E503M-88(2004)
Năm ban hành 2004
Publication date
Tình trạng
W - Hết hiệu lực
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Tên tiếng Anh
Title in English Standard Test Methods for Measurement of Skid Resistance on Paved Surfaces Using a Passenger Vehicle Diagonal Braking Technique (Withdrawn 2010)
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Chỉ số phân loại Quốc tế (ICS)
By field |
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Số trang
Page 5
Giá:
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Phạm vi áp dụng
Scope of standard 1.1 These test methods cover the measurement of skid resistance on paved surfaces with a passenger vehicle equipped with specified full-scale vehicle tires and using the diagonal braking mode. These test methods include the following:1.1.1 Full-Stop Method This represents the nonsteady-state skid resistance on two diagonally locked wheels, as the vehicle decelerates over a wetted pavement surface under specified limits of static wheel load and from a desired speed. The vehicle shall remain essentially parallel to its original direction of motion.1.1.2 Pulse-Braking MethodThe deceleration resulting from momentary diagonal wheel lockup (pulse braking) is measured. The vehicle decelerates over a wetted pavement surface under specified limits of static wheel load and at a desired speed. The vehicle shall remain essentially parallel to its original direction of motion.1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents: therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
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