【国外标准】 Standard Specification for Asphalt Based Protection Board for Below-Grade Waterproofing

This specification covers the manufacture, testing, and physical requirements of two classes of asphalt based protection board used for protecting the integrity of below grade or below wearing surface waterproofing. Class A is made with asphalt saturated organic felt on the bottom and a coated or saturated non-woven glass felt on top, while Class B is made with glass fabrics both top and bottom. The boards shall be sampled for testing, and each class shall conform accordingly to specified individual values of the following physical properties: nominal thickness; puncture strength; water absorption; asphalt content; and resistance to decay.1.1 This specification covers an asphalt based protection board used for protecting the integrity of below grade or below wearing surface waterproofing. The protection board protects the waterproofing system from backfill, surfacing, construction activities, and weathering conditions prior to backfilling or applying surfacing.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 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 Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.