Effect of fibre type and geometry on maximum pore pressures in fibre-reinforced high strength concrete at elevated temperatures

Compressive strength at high temperatures of a concrete made with recycled tire textile and steel fibers

“…The experimental results showed that the addition of fibers with lower sublimation temperatures presented and improved the concrete performance when compared to fibers with higher melting temperatures [14].…”

“…They also found that the longer fibers with smaller diameters attenuate the increase of pressure at the mixture pores when compared with the shorter fibers with larger diameters and regardless of the type of fibre. On the other hand, found that concrete mixtures reinforced with PP fibers had a better behavior under fire conditions than the PVA fibers, because PP fibers have better bonding properties with the concrete matrix [14].…”

“…In this study were tested polypropylene (PP), polyvinyl alcohol (PVA) and steel fibers (FA). All compositions were reinforced with the same amount of fibers (0.1% by volume) and subjected to a heating rate of 10 • C/min [14].…”

Mechanical properties of lightweight concrete made with coal ashes after exposure to elevated temperatures

“…One of the most destructive causes of concrete failure is fire [14]. Fire, unlike many other threats to concrete, may cause complete failure with a single case of exposure, making it difficult to take necessary measures when a threat or the resulting damage is first detected.…”

Microstructural response of polypropylene fibres at high temperature to protect concrete from spalling

“…Although does not exist a conclusive known about how this type of fibres works, it has been demonstrated that their presence in concrete reduces the pore pressure at high temperature, associated with its melting ability creating hollows where the water steam is transported [1,4] and relaxes vapour pressures. The permeability also increases by incorporating PP fibres, especially at temperatures near 170…”