Abstract
Most test methods that have been commonly adopted as durability tests mainly focus on a roofing material itself because of easiness and low costs in tests. However, the informatiopn we really ask for is not durability of the individual materials,but long term performance of a roof membrane system. In this paper, new laboratory test methods for evaluating durability of performance of a roof membrane system are proposed by combining the performance tests reported in the 1995 IWA congress and various aging processes. First, the levels of specimends are determined in eight performances such as resistance to static puncture, resistance to dynamic puncture, resistance to cylic fatigue, stability of joints between rofing membranes, resistance to sliding on vertical surface, stability at corners in supports, resistance to suction, resistance to pressure beneath membrane. Then, they are exposed in the four aging conditions of heat, ultraviolet radiation, moisture and ozone gas. After the exposure, the levels of eight performances of them are measured again and the change in level of performances is investigated. The evaluation by the methods was tried to apply the roof membrane systems that are commonly used in Japan, such as two kinds of built up roof membrane systems, a torch on system, a sheet applied system and a liquid applied system. Some results obtained from the tests were finally discussed.
Most test methods that have been commonly adopted as durability tests mainly focus on a roofing material itself because of easiness and low costs in tests. However, the informatiopn we really ask for is not durability of the individual materials,but long term performance of a roof membrane system. In this paper, new laboratory test methods for evaluating durability of performance of a roof membrane system are proposed by combining the performance tests reported in the 1995 IWA congress and various aging processes. First, the levels of specimends are determined in eight performances such as resistance to static puncture, resistance to dynamic puncture, resistance to cylic fatigue, stability of joints between rofing membranes, resistance to sliding on vertical surface, stability at corners in supports, resistance to suction, resistance to pressure beneath membrane. Then, they are exposed in the four aging conditions of heat, ultraviolet radiation, moisture and ozone gas. After the exposure, the levels of eight performances of them are measured again and the change in level of performances is investigated. The evaluation by the methods was tried to apply the roof membrane systems that are commonly used in Japan, such as two kinds of built up roof membrane systems, a torch on system, a sheet applied system and a liquid applied system. Some results obtained from the tests were finally discussed.
Date
10/2000
10/2000
Author(s)
Kyoji Tanaka ; Ichiro Schimizsu
Kyoji Tanaka ; Ichiro Schimizsu
Page(s)
467-478
467-478
Keyword(s)
durability; system performance; aging;
durability; system performance; aging;