本文件描述了一种测定沥青中游离酸性成分的方法，通常称为酸值。警告——本文件的使用可能涉及危险材料、操作和设备。本文件并非旨在解决与其使用相关的所有安全问题。本文件的使用者有责任在使用前建立适当的安全和健康实践，并确定监管限制的适用性。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document describes a method for the determination of the free acidic constituents present in bitumen, conventionally known as acid number.WARNING — The use of this document may involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.All current amendments available at time of purchase are included with the purchase of this document.