Effect of the elevated temperatures on the mechanical behaviour of PBO-FRCM systems

Luciano Ombres, Pietro Mazzuca, Marielda Guglielmi

Abstract

Over the last two decades, fabric reinforced cementitious matrix (FRCM) materials started to be used as a strengthening system in a wide variety of structural applications, especially where their firerelated advantages may offer an alternative to traditional composite materials (e.g. FRP materials). However, there is a major gap in the knowledge of FRCM composites: the lack of information about their mechanical response at elevated temperature. The main objective of this paper is to provide further insights about the influence of elevated temperatures on the mechanical properties of a Polypara-pheny lene-benzo-bisthiazole (PBO) FRCM system. Direct tensile (DT) tests and single lap direct shear tests (DS) were performed respectively on PBO FRCM specimens and PBO FRCM-concrete prisms, for temperatures ranging from 20 ºC up to 300 ºC. Specimens were first heated up to the target temperature, and then loaded up to failure at ambient temperature. The results obtained show that both tensile and bond strength suffer relatively low reductions up to 200 ºC. For increasing temperature, the degradation of the mechanical properties was more pronounced: at 300 ºC, the reductions of tensile and bond strength were 65% and 40%, respectively.

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IMEKO-TC4-MetroArchaeo2022-091.pdf

DOI

10.21014/tc4-ARC-2022.091

IMEKO TC

TC4 - Measurement of Electrical Quantities

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