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A platform for research: civil engineering, architecture and urbanism
Waste Polyethylene terephthalate flakes modified by gamma rays and its use as aggregate in concrete
Highlights Cement concrete specimens with waste PET flakes were elaborated. Effects of gamma radiation and waste PET flakes concentrations were studied. Improvement of 34% on the compressive strength was obtained. Elasticity modulus was improved up to 114% respect to control concrete. Structural changes on the waste PET flakes by gamma radiation were evaluated.
Abstract Severe environmental problems are generated by the excessive amount of waste Polyethylene Terephthalate (PET). A popular way to reuse it is to recycle as filler material in concrete technology. However, some mechanical properties decrease because of adhesion weakness between cement paste and waste polymers, when they are added. One alternative solution to deal with it is to use the radiation. In this respect, the influences of waste Polyethylene Terephthalate (PET) flakes and gamma radiation on strength, deformation capacity and elasticity modulus of cement based concrete were studied. In production, cement, water, gravel and sand were mixed. The sand was replaced with the PET flakes with 0.71, 1.4, 2.8 mm at 1, 2.5 and 5% in volume. Then, the specimens were subjected to 100, 150 and 200 kGy. Results present higher compressive strength (~34%) and elasticity modulus (~114%) for irradiated concretes when compared with those values obtained for reference specimen. However, deformation decreases about 88%. Such mechanical results were associated with the physicochemical characteristics induced by gamma rays on flakes and cement; which were evaluated by SEM, TGA, DSC and X-ray diffraction (XRD).
Waste Polyethylene terephthalate flakes modified by gamma rays and its use as aggregate in concrete
Highlights Cement concrete specimens with waste PET flakes were elaborated. Effects of gamma radiation and waste PET flakes concentrations were studied. Improvement of 34% on the compressive strength was obtained. Elasticity modulus was improved up to 114% respect to control concrete. Structural changes on the waste PET flakes by gamma radiation were evaluated.
Abstract Severe environmental problems are generated by the excessive amount of waste Polyethylene Terephthalate (PET). A popular way to reuse it is to recycle as filler material in concrete technology. However, some mechanical properties decrease because of adhesion weakness between cement paste and waste polymers, when they are added. One alternative solution to deal with it is to use the radiation. In this respect, the influences of waste Polyethylene Terephthalate (PET) flakes and gamma radiation on strength, deformation capacity and elasticity modulus of cement based concrete were studied. In production, cement, water, gravel and sand were mixed. The sand was replaced with the PET flakes with 0.71, 1.4, 2.8 mm at 1, 2.5 and 5% in volume. Then, the specimens were subjected to 100, 150 and 200 kGy. Results present higher compressive strength (~34%) and elasticity modulus (~114%) for irradiated concretes when compared with those values obtained for reference specimen. However, deformation decreases about 88%. Such mechanical results were associated with the physicochemical characteristics induced by gamma rays on flakes and cement; which were evaluated by SEM, TGA, DSC and X-ray diffraction (XRD).
Waste Polyethylene terephthalate flakes modified by gamma rays and its use as aggregate in concrete
Martínez-Barrera, Gonzalo (author) / Ávila-Córdoba, Liliana (author) / Ureña-Núñez, Fernando (author) / Martínez, Mar Alonso (author) / Álvarez-Rabanal, Felipe Pedro (author) / Gencel, Osman (author)
2020-09-18
Article (Journal)
Electronic Resource
English
Sustainable Structural Lightweight Concrete with Recycled Polyethylene Terephthalate Waste Aggregate
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