This standard specifies two methods for the water absorption test of asphalt waterproofing membranes, the vacuum water absorption method and the normal pressure water absorption method. This standard is applicable to the acceptance and arbitration test of petroleum asphalt paper-based felt, oil-paper waterproofing membrane (hereinafter referred to as membrane) and other waterproofing membranes that are allowed to adopt this standard.
GB/T 328.4-1989 history
2007GB/T 328.27-2007 Test methods for building sheets for waterproofing Part 27: Bitumen ,Plastic and rubber sheets for waterproofing-water absorption
1989GB/T 328.4-1989 Test methods for asphalt waterproof roll roofing--Water absorption of asphalt
GB/T 328.4-1989 Test methods for asphalt waterproof roll roofing--Water absorption of asphalt was changed to GB/T 328.27-2007 Test methods for building sheets for waterproofing Part 27: Bitumen ,Plastic and rubber sheets for waterproofing-water absorption.