Materials and Structures

, Volume 26, Issue 6, pp 355–361 | Cite as

Effect of heat-ageing on the thermal and mechanical properties of APP- and SBS-modified bituminous roofing membranes

  • I. Rodriguez
  • O. Dutt
  • R. M. Paroli
  • N. P. Mailvaganam


The effect of heat-ageing on four bituminous roofing membranes, two modified with atactic polypropylene (APP) and two modified with styrene-butadiene-styrene (SBS) was studied using tensile testing and dynamic mechanical thermals analysis (DMA). The samples were heated at 80°C for 7, 28, 84 and 168 days and were tensile tested at 23, 0, −10, −20 and −30°C. Each heat-aged sample was also subjected to thermomechanical testing to find its glass transition temperature T g . The results show significant variation in the effect of heat-ageing on tensile strength and elongation of membranes. T g values differ with the modifiers and other ingredients of the membranes and are affected by heat-ageing. The influence of the glass transition zone measured by DMA is also reflected in the tensile test results.


Tensile Strength Asphalt Glass Transition Temperature Bitumen Dynamic Mechanical Thermal Analysis 
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On a étudié l’influence du vieillissement par la chaleur sur quatre membranes d’étanchéité, deux d’entre elles étant traitées par APP (polypropylène atactique) et deux par SBS (styrène de styrène butadiène), à l’aide de l’essai en traction et de l’analyse thermique mécaniques (DMA). Les échantillons ont été chauffés à 80°C pendant 7, 28, 84 et 168 jours et essayés en traction à 23, 0, −10, −20 et −30°C. Chaque échantillon vieilli par la chaleur a été également soumis à un essai thermomécanique pour identifier sa température de passage à l’état vitreux T g .

Les résultats montrent des différences importantes dans l’influence de la chaleur sur la résistance en traction et l’allongement des membranes. Les valeurs de T g diffèrent selon les traitements et les autres composants des membranes, et sont affectées par le vieillissement par la chaleur. L’influence de la zone de passage à l’état vitreux mesurée par l’analyse thermique mécainique se traduit aussi dans les résultats de l’essai en traction.


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Copyright information

© RILEM 1993

Authors and Affiliations

  • I. Rodriguez
    • 1
  • O. Dutt
    • 2
  • R. M. Paroli
    • 2
  • N. P. Mailvaganam
    • 2
  1. 1.Laboratorio Central de Estructuras y Materiales (CEDEX)MadridSpain
  2. 2.Institute for Research in ConstructionNational Research Council of CanadaOttawaCanada

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