Standard Specification for Coal-Tar Glass Felt Used in Roofing and Waterproofing (Includes all amendments and changes 5/15/2020).
NORMA vydaná dňa 1.5.2020
Označenie normy: ASTM D4990-97a(2020)
Dátum vydania normy: 1.5.2020
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
This specification covers glass felt impregnated with coal tar intended to be used with coal tar pitch in the construction of built-up roofs and waterproofing systems. The felt shall be a thin, porous sheet of uniformly distributed glass fibers, with or without the addition of reinforcing stranded glass yarns, and bonded with a water-resistant resinous binder. Longitudinal and transverse breaking strength, pliability, width, area, net dry mass, parting agent and stabilizer content, moisture content, desaturated mass, bituminous saturant (coal tar) content, and ash content are among the property requirements to which the glass felts should conform to.
Keywords:
built-up roofs, coal tar, glass felt, waterproofing,, ICS Number Code 91.100.50 (Binders. Sealing materials)