Abstract
Waterproofing membranes are directly or indirectly susceptible to solar radiation and weathering. The majority of the oxidized bituminous and modified bituminous and the synthetic single ply membranes, such as plasticized PVC and chlorinated polyethylene, applied to low slope roofs degrade in some degree due to the presence of solar radiation, including ultraviolet, heat and atmospheric oxygen. These factors commonly result in physical changes that occur in strength, elongation & toughness of the membrane. A research project was carried out in the hot dry climatice region of Saudi Arabia to investigate the performance oflowslope roofs,roofing and insulation materials. A field station was set up to examine the effects of solar radiation and weathering on the waterproofing and thermal insulation materials, and to monitor the surface and the inner temperatures of the applied roof system. Various oxidized bituminous and modified bituminous membranes and unreinforced and reinforced plasticized PVC and CPE membranes aged on the roof of the station were physically tested before and after weathering. Weather condition specifically measured surface temperatures and the applied testes will be presented in this paper. The subsequent results concerning tensile strength, elongation, stain energy and toughness of these materials will be analyzed, compared and evaluated, and the outcome will be discussed.
Waterproofing membranes are directly or indirectly susceptible to solar radiation and weathering. The majority of the oxidized bituminous and modified bituminous and the synthetic single ply membranes, such as plasticized PVC and chlorinated polyethylene, applied to low slope roofs degrade in some degree due to the presence of solar radiation, including ultraviolet, heat and atmospheric oxygen. These factors commonly result in physical changes that occur in strength, elongation & toughness of the membrane. A research project was carried out in the hot dry climatice region of Saudi Arabia to investigate the performance oflowslope roofs,roofing and insulation materials. A field station was set up to examine the effects of solar radiation and weathering on the waterproofing and thermal insulation materials, and to monitor the surface and the inner temperatures of the applied roof system. Various oxidized bituminous and modified bituminous membranes and unreinforced and reinforced plasticized PVC and CPE membranes aged on the roof of the station were physically tested before and after weathering. Weather condition specifically measured surface temperatures and the applied testes will be presented in this paper. The subsequent results concerning tensile strength, elongation, stain energy and toughness of these materials will be analyzed, compared and evaluated, and the outcome will be discussed.
Date
9/1997
9/1997
Author(s)
Ertan Ozkan
Ertan Ozkan
Page(s)
242-252
242-252
Keyword(s)
weathering; degradation;elongation; modified bitumen; oxidized; performance standard; single ply; strain energy; tensile strength; toughness; waterproofing
weathering; degradation;elongation; modified bitumen; oxidized; performance standard; single ply; strain energy; tensile strength; toughness; waterproofing