1 Scope
This part of GB/T 328 specifies a method for the determination of the resistance tearing (nail shank) of bitumen sheets for roofing.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of GB/T 328. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to these specifications.
GB/T 328.1 "Test methods for building sheets for waterproofing—Part 1:Bitumen plastic and rubber sheets for waterproofing rules for sampling"
JJG 139-1999 "Verification Regulation of Universal Tension and Compression Testing Machine"
3 Terms and Definitions
For the purposes of GB/T 328, the following terms and definitions apply.
Resistance to tearing (nail shank)
The tensile force required to tear a test specimen held by a nail shank.
4 Principle
The test measures the force required to tear a test specimen pierced by a nail shank by a force applied to the product at right angles to the shank axis.
