Degradation of recycled PET fibers in Portland cement-based materials

Journal Article · Thu Sep 01 00:00:00 EDT 2005 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2004.10.040· OSTI ID:20706234

Silva, D A ^[1]; Betioli, A M ^[1]; Gleize, P J.P. ^[1]; Roman, H R ^[1]; Gomez, L A ^[1]; Ribeiro, J L.D. ^[2]

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1. Universidade Federal de Santa Catarina, Department of Civil Engineering, C.P. 476, CEP 88040-900, Florianopolis, SC (Brazil)
2. Universidade Federal do Rio Grande do Sul, Porto Alegre, RS (Brazil)

In order to investigate the durability of recycled PET fibers embedded in cement-based materials, fiber-reinforced mortar specimens were tested until 164 days after mixing. Compressive, tensile, and flexural strengths, elasticity modulus, and toughness of the specimens were determined. The mortars were also analyzed by SEM. The results have shown that PET fibers have no significant influence on mortars strengths and elasticity modulus. However, the toughness indexes I {sub 5}, I {sub 10}, and I {sub 20} decreased with time due to the degradation of PET fibers by alkaline hydrolysis when embedded in the cement matrix. Fourier transform infrared spectroscopy (FT-IR) and SEM analysis of PET fibers immersed and kept for 150 days in alkaline solutions supported the conclusions.

• OSTI ID: 20706234
• Journal Information: Cement and Concrete Research, Vol. 35, Issue 9; Other Information: DOI: 10.1016/j.cemconres.2004.10.040; PII: S0008-8846(05)00016-5; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE HYDROLYSIS
ELASTICITY
FIBERS
FLEXURAL STRENGTH
FOURIER TRANSFORM SPECTROMETERS
FOURIER TRANSFORMATION
INFRARED SPECTRA
MORTARS
PORTLAND CEMENT
SCANNING ELECTRON MICROSCOPY