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Abstract
The values of breaking load, elongation and thermal expansion of nine bituminous built-up membranes prepared by roofing contractors under field conditions and by technicians in the laboratory were measured at subfreezing temperatures. The data indicated that the field-prepared specimens agreed favorably with laboratory-prepared specimens, although the samples from the field frequently reflected higher values for thermal shock resistance than did their laboratory-prepared counterparts. The higher values were attributed to the smaller amounts of bitumen used between the plies of the field specimens. The results appeared to support the validity of the application of the strength thickness rule to bituminous built-up membranes.
The values of breaking load, elongation and thermal expansion of nine bituminous built-up membranes prepared by roofing contractors under field conditions and by technicians in the laboratory were measured at subfreezing temperatures. The data indicated that the field-prepared specimens agreed favorably with laboratory-prepared specimens, although the samples from the field frequently reflected higher values for thermal shock resistance than did their laboratory-prepared counterparts. The higher values were attributed to the smaller amounts of bitumen used between the plies of the field specimens. The results appeared to support the validity of the application of the strength thickness rule to bituminous built-up membranes.
Date
12/1968
12/1968
Author(s)
Thomas Boone; Leopold Skoda; William Cullen
Thomas Boone; Leopold Skoda; William Cullen
Page(s)
13
13
Keyword(s)
bituminous adhesive; engineering properties; membrane; strength thickness; bituminous built up; lab field comparison
bituminous adhesive; engineering properties; membrane; strength thickness; bituminous built up; lab field comparison