#逆反射亮度系数测试方法 1 个

#雨夜标线 4 个

#测试方法 3 个

#标线及涂料检验检测 11 个

ASTM E2832-2017

Standard Test Method for

Measuring the Coefficient of Retroreflected Luminanceof Pavement Markings in a Standard Condition of Continuous Wetting (RL-2)

在连续降雨条件下交通标线逆反射亮度系数测试方法(RL-2)

ASTM E2832-12(2017)

Scope范围

Scope

1.1  This test methodcovers a measurement of the wet retroreflective (mcd/m

2

/lx) propertiesof horizontal pavement marking materials, such as traffic stripes and roadsurface symbols. A standardized method utilizing a standardized continuouswetting device and a portable retrorefleclometer is described to obtainmeasurements of the welretroreflective properties of horizontal pavementmarkings.

1.范围

1.1该测试方法涵盖了对水平路面标记材料（例如交通标线和路面符号）的连续降雨条件下的逆反射性能的测量。规定了一种利用标准化的连续降雨装置和便携式逆反射仪，来测得水平路面标线的逆反射亮度系数的标准化试验方法。

1.2  Retroreflectiveperformance obtained with this test in a standardized condition of continuouswetting does not necessarily relate to how markings perform in all conditionsof natural rain.

NOTE 1—Test Method E2I77 may be used to describe theretroreflective properties of pavement markings in conditions of wetness, suchas after a period of rain.

1.2在标准的连续降雨条件下，通过此测试获得的逆反射性能不一定与自然降雨条件下的逆反射性能的表现相同。

注1：试验方法E2I77在潮湿条件下（例如下雨后）测试路面标线的逆反射性能。

1.3  This testmethod is suitable for measurements made in the laboratory and in the fieldwhen the necessary controls and precautions are followed.

1.3本试验方法适用于在实验室和现场进行的质量跟踪及控制的测量。

1.4  This testmethod specifies the use of external beam retroreflectometers conforming toTest Method El710.

2

   Theentrance and observation angles required of the retroreflectometer in this testmethod are commonly referred to as “30 meter geomelry."

2

1.4本试验方法规定了符合规范El710.2的外光源逆反射测量仪的使用。在本试验方法中，逆反射测量仪所需的入射角和观察角度通常称为“30米几何条件”

2

1.5  The testmethod excludes the effects of rain between the vehicle and the marking.

1.5此试验方法不包括雨水对车辆和标线之间的视觉影响。

1.6  Resultsobtained using this test method should not be the sole basis for specifying andassessing the wet retroreflective etfectiveness of pavement marking systems.Users should complement the results of this test method with other evaluationresults, such as nighttime visual inspections.

1.6使用该测试方法获得的结果不应成为界定和评估路面标线连续降雨下逆反射性能的唯一依据。用户应将此测试方法的结果与其他判定结果综合评估，例如：

夜间目视检查。

1.7  The valuesstated in SI units are to be regarded as standard. The values given inparentheses are for information only.

1.7以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。

1.8  Thisstandard 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 standardto establish appropriate safety, health, and environmental practices and determinethe applicability of regulatory limitations prior to use.

1.8本标准并非旨在解决与使用相关的所有安全问题。本标准的使用者有责任建立适当的安全，健康和环境规范，并在使用前确定其适用性。

        1.9Thisinternational standard was developed in accordance with internationally recognizedprinciples on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued bythe World Trade Organization Technical Barriers to Trade (TBT) Committee.

1.9本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

2．ReferencedDocuments参考文件

2     Referenced Documents 引用文件

        2.1   ASTM Standards: ASTM标准

El77 Practice for Use of the Terms Precision and Bias in ASTM TestMethods

E691 Practice for Conducting an In ter laboratory Study to Determinethe Precision of a Test Method

E965 Test Method for Measuring Pavement Macrotexture Depth Using aVolumetric Technique

E1710 Test Method for Measurement of Retroreflective Pavement MarkingMaterials with CEN-Prescribed Geometry Using a Portable Retroreflectometer

E2177 Test Method for Measuring the Coefficient of Ret- roreflecledLuminance (R

L

) of Pavement Markings in a Standard Condition of Wetness

E177美国材料试验标准试验方法中精度和误差的使用实施规程

E691进行室内研究以确定试验方法精度的实施规程

E965用体积技术测量路面宏观纹理深度的试验方法

E1710使用便携式逆反射测量仪按CEN规定的几何条件测试逆反射路面标线材料的试验方法

E2177在标准潮湿条件下路面标线逆反射亮度系数（RL）测试方法

3. Terminology 术语

3 Terminology 术语

3.1Definitions:定义

    3.1.1coefficient of retroreflected luminance, RL, n—the ratio of theluminance, L, of a projected surface to the normal illuminance, E, at thesurface on a plane normal to the incident light, expressed in millicandelas persquare metre per lux (mcd/nr/lx).

    3.1.1逆反射亮度系数RL，投影到标线表面的亮度L与垂直于入射光的平面上的法向照度E之比，以毫坎德拉每平方米每勒克斯(mcd/m2/lx1)表示。

    3.1.2conditions of continuous wetting, n—the test condition where thepavement marking specimen is subjected to continu¬ously uninterrupted waterspray applied uniformly over a pavement marking at a defined and controlledrate during measurement.

    3.1.2连续降雨条件，在测量过程中以规定的流量对路面标线测试区（样板）域连续不间断地喷水，均匀地喷洒在路面标线上。

    3.1.3external beam R, retroreflectomeiers, n—a pavement markingretroreflectometer that measures the coefficient of retrorefleeted luminance.RL, in a measurement area that falls entirely outside the retroreflectometer.

    3.1.3外光源逆反射测量仪，一种路面标线逆反射测量仪，用于测量逆反射亮度系数RL，测试光源的测量区域完全位于逆反射仪之外。

    3.1.4 R

L-2

, the steadystate coefficient of retroreflected luminance, R

L

, determined underdefined conditions of continuous wetting at a rate of 2 inches per hour.

         3.1.4 R

L-2

，逆反射亮度系数测试稳定状态，RL，在以2英寸/小时（50.8毫米/小时）连续降雨量的规定条件下测定。

    3.1.4.1 Discussion—The results from thistest method shall be reported as R(L.2) where "2" designates thewetting rate used in inches per hour (in./h).

      3.1.4.1 注——该试验方法的结果应报告为R

(L-2

)，其中“2”表示以英寸/小时为单位使用的降雨量。

3.1.5steady state conditions, n一the measurements have reached steady statewhen six consecutive retroreflectometer instrument readings made atapproximately 10s intervals show no consistent tending of the coefficient ofretroreflected luminance value up or down.

3.1.5稳态状态一当以大约10s的间隔进行连续六次逆反射亮度系数测量并记录逆反值，没有明显的上升或下降时，测量达到稳定状态。

测试方法概述

4.  Summary of Test Method 测试方法概述

4.1This test method describes a standard procedure for measuring theretroreflective properties of horizontally applied pavement marking systemsunder conditions of continuous wetting.

4.1本试验方法详述了在连续降雨条件下测量水平路面标线逆反射性能的标准化操作程序。

4.2The pavement marking system under test is subjected to continuouswetting delivered by a wetting device of a specified design calibrated toprovide a controlled wetting rate.

4.2试验中的路面反光标线由连续降雨模拟装置提供连续降雨条件，该连续降雨装置经过校准以提供标准的降雨量。

4.3A protocol andinstrument requirements are described for measuring RL_2 under a definedcondition of continuous wetting.

4.3 描述了在规定的连续降雨条件下测量R

L-2

的方法和仪器要求。

5.

意义和用途

....