Soft Pre-stressed PET Profiles as reinforcing fibers in structural elements made of concrete
Perfiles de PET ligeramente pretensados como fibras de refuerzo en elementos estructurales de concreto
Palabras clave:
PET profiles, fiber matrix, beams-type, concrete, Pre-stress, PET fibers, probabilistic model (en)Perfiles de PET, matriz de fibra, tipo vigas, concreto, pretensado, Fibras de PET, modelo probabilístico (es)
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The inclusion of pre-stressed PET profiles as reinforcing fibers in structural elements is proposed. The PET-profiles are placed in a unidirectional and bidirectional fiber matrix with soft pre-tensioned condition that they could have advantages in structural members made of concrete in some precise applications, for instance, structural support for road safety barriers. A universal machine is used to test PET-profiles with different width, knots and even other conditions. The desired PET profile is chosen and the concrete mixture is designed under the ACI standard guidance. Pre-stressed PET-profiles are included in wood molds shaped in beam-type and subsequently flexural strength is estimated. Finally, experimental tests results are presented for PET-profiles as structural reinforcement of beams made of concrete under pure flexural. Finally, a probabilistic model is used to estimate the PET contribution in terms of exceedance of the rupture modulus.
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