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Abstract
Results are presented and discussed of a laboratory study which measures ply adhesion of polymer modified bitumen membranes assembled under a wide range of applicatoin conditions and temperatures. The evaluation includes both standard and styrene-ethylene-butylene-styrene (SEBS) modified asphalts. Additional factors examined include the role of mineral parting agents, the temperature of the individual sheets during membrane construction, as well as the effects of room temperature and dark oven heat aging at 70C (158F) of the completed assemblies. The findings indicate that the use of evaluated bitumen applicatoin temperatures, previously thought to improve adhesion , has litte or no effect on interplyh peel strengths. When considering the other deleterious consuquences which may result from the elevated heating of asphalts, this approach may be considered more detrimental than beneficial to long term system performance.
Results are presented and discussed of a laboratory study which measures ply adhesion of polymer modified bitumen membranes assembled under a wide range of applicatoin conditions and temperatures. The evaluation includes both standard and styrene-ethylene-butylene-styrene (SEBS) modified asphalts. Additional factors examined include the role of mineral parting agents, the temperature of the individual sheets during membrane construction, as well as the effects of room temperature and dark oven heat aging at 70C (158F) of the completed assemblies. The findings indicate that the use of evaluated bitumen applicatoin temperatures, previously thought to improve adhesion , has litte or no effect on interplyh peel strengths. When considering the other deleterious consuquences which may result from the elevated heating of asphalts, this approach may be considered more detrimental than beneficial to long term system performance.
Date
0/1999
0/1999
Author(s)
K Chernotowich
K Chernotowich
Page(s)
1093-1102
1093-1102
Keyword(s)
asphalt heat aging; temperature; modified bitumen; SEBS, T peel adhesion
asphalt heat aging; temperature; modified bitumen; SEBS, T peel adhesion