Factors affecting the tensile strength of bituminous geomembrane seams

Author:

Francey W.1,Rowe R. K.2

Affiliation:

1. PhD student, Queen's University, Kingston, Canada,

2. Professor, Queen's University, Kingston, Canada,(corresponding author)

Abstract

The tensile shear strength, break location, and constant tensile load failure times are examined for seams made from one 4 mm-thick bituminous geomembrane (BGM) product, with corresponding observations specific to that material. In short-term tests, failure is observed within the sheet material once the seam strength exceeded 0.8 times that of the sheet material. The effects of seam thickness reduction and overlap width on seam strength are examined for two methods of seaming. Seams with a short-term strength meeting or exceeding 80% of the sheet strength are subjected to constant tensile loads between 18 and 55% of sheet ultimate strength and the time to failure is reported. The relationship between short-term seam strength and time to failure under sustained load and thickness reduction and squeeze-out is investigated. Constant tensile load testing is proposed as a construction quality assurance procedure to assess the degree of geotextile engagement of field seams.

Publisher

Emerald

Reference24 articles.

1. ASTM D5262-07. Standard Test Method for Determining the Unconfined Tension Creep and Creep Rupture Behavior of Planar Geosynthetics Used for Reinforcement Purposes. ASTM International, West Conshohocken, PA, USA.

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