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Dynamic Viscoelastic Characterization of Bitumen/Polymer Roofing Membranes

✍ Scribed by Goretti Goikoetxeaundia; Oscar González; María Eugenia Muñoz; Juan José Peña; Anton Santamaría

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
292 KB
Volume
292
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Dynamic viscoelastic functions of bitumen/polymer waterproofing membranes are investigated. Analyses of the effect of polymer concentration on the height of the loss tangent peak observed around 20 °C reveals the existence of a continuous polymer phase. The variation of the elastic modulus and the loss modulus with frequency leads to define a Relaxation Spectrum Index which is used to determine the polymer concentration for the phase inversion. This is related to the Spanish UNE 104281 technical norm on bitumen/polymer blends for roofing. The results of the elastic modulus as a function of temperature and frequency were employed to evaluate the bonding capacity of the membranes to the roof surface. New perspectives on the characterization of bitumen/polymer membranes, similar to the Strategic Highway Research Program (SHRP) used in road pavement, are open.

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