Test Background
Asphalt waterproofing membrane refers to a rolled material made of asphalt material, tire material and anti-adhesive material spread on the surface. It is also called linoleum. The shear performance between the overlap widths of asphalt membranes varies with the overlap method (flame or thermal welding, thermal bonding such as asphalt, cold adhesive, etc.), the size of the overlap, and the operating process. The asphalt waterproofing membrane joint shear test can measure the shear performance of the joints between the same asphalt roof waterproofing membranes, and test the mechanical fastening or compression performance of the single-layer roofing asphalt waterproofing membrane joints.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various construction waterproofing membranes, and provides professional joint shear testing services for asphalt waterproofing membranes.
Scope of tests
According to different manufacturing methods, it is divided into two types: impregnated membrane (with tires) and rolled membrane (without tires). The former is made by impregnating and coating asphalt with raw paper or glass cloth, fabric and other tire materials, and then sprinkling spreading materials (talcum powder, fine sand, mica powder, etc.) on the surface; the latter is made by mixing asbestos, rubber powder, etc. into asphalt and rolling it.
Test method
The joints of the specimen are stretched at a constant speed until the specimen is damaged or separated, and the tensile force is recorded continuously during the entire test.
The specimen is firmly placed into the clamp of the tensile testing machine so that the longitudinal axis of the specimen coincides with the axis of the tensile testing machine and the clamp. The entire distance between the clamps is (200±5) mm and does not bear preload.
Test standard:
GB/T 328.22-2007 Test methods for construction waterproofing membranes Part 22: Asphalt waterproofing membranes Seam shear performance
EN 12317-1: 1999 Determination of joint shear properties of flexible waterproofing membranes Part 1: Roofing waterproofing bitumen membranes
GB/T 328.1 Test methods for construction waterproofing membranes Part 1: Asphalt and polymer waterproofing membranes Sampling rules
JJG 139-1999 Tensile, Compression and Universal Testing Machine
