This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards Guides and Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:E2177-20 INTERNATIONAL Standard Test Method for Measuring the Coefficient of Retroreflected Luminance (RL) of Pavement Markings using the Bucket Method in a Condition of Wet Recovery This standard is issued under the fixed designation E2177;the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript cpsilon (a)indicates an cditorial change sincc the last revision or rcapproval. 1.Scope 1.6 This standard does not purport to address all of the 1.1 This test method covers the measurement of the wet safety concerns if any associated with its use.It is the retroreflective (R properties of horizontal pavement marking responsibility of the user of this standard to establish appro- materials such as traffic stripes and road surface symbols priate safety health and environmental practices and deter- using a portable retroreflectometer that can be placed on or mine the applicability of regulatory limitations prior to use. before the road marking to measure the retroreflection at the 1.7 This international s...
ASTM E2177-20 在湿恢复条件下用桶法测量路面标线反射亮度系数（RL）的标准试验方法.pdf
