Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Degradation of recycled PET fibers in Portland cement-based materials
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 I5, I10, and I20 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.
Degradation of recycled PET fibers in Portland cement-based materials
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 I5, I10, and I20 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.
Degradation of recycled PET fibers in Portland cement-based materials
Silva, D.A. (Autor:in) / Betioli, A.M. (Autor:in) / Gleize, P.J.P. (Autor:in) / Roman, H.R. (Autor:in) / Gomez, L.A. (Autor:in) / Ribeiro, J.L.D. (Autor:in)
Cement and Concrete Research ; 35 ; 1741-1746
2005
6 Seiten, 13 Quellen
Aufsatz (Zeitschrift)
Englisch
Polyethylenterephthalat , faserverstärkter Werkstoff , Mörtel , Druckfestigkeit , Elastizitätsmodul , Biegefestigkeit , Zähfestigkeit , Hydrolyse , Fourier-Transform-Infrarotspektroskopie , Rasterelektronenmikroskopie , Polymerfaser , faserverstärkter Beton , faserverstärkter Zement , Portlandzement , chemischer Abbau
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