Waste Polyethylene terephthalate flakes modified by gamma rays and its use as aggregate in concrete
| Autor: | Felipe Pedro Álvarez-Rabanal, Mar Alonso Martínez, Fernando Ureña-Núñez, Osman Gencel, Gonzalo Martínez-Barrera, Liliana Ávila-Córdoba |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Cement Materials science Aggregate (composite) technology industry and agriculture 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Polymer engineering.material 0201 civil engineering chemistry.chemical_compound Compressive strength chemistry Filler (materials) 021105 building & construction Polyethylene terephthalate engineering General Materials Science Deformation (engineering) Composite material Elastic modulus Civil and Structural Engineering |
| Zdroj: | CONSTRUCTION AND BUILDING MATERIALS |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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