Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres
Autor: | Xiaoshan Lin, Muhammad Junaid Munir, Syed Minhaj Saleem Kazmi, Muhammad Riaz Ahmad, Yu-Fei Wu |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Toughness
Materials science Geography Planning and Development 0211 other engineering and technologies TJ807-830 020101 civil engineering 02 engineering and technology Surface finish Management Monitoring Policy and Law TD194-195 Renewable energy sources 0201 civil engineering Stress (mechanics) chemistry.chemical_compound macro-polypropylene fibres 021105 building & construction GE1-350 Composite material Polypropylene Aggregate (composite) Strain (chemistry) Environmental effects of industries and plants Renewable Energy Sustainability and the Environment axial stress-strain performance Environmental sciences fibre-reinforced concrete chemistry Properties of concrete Cylinder stress recycled aggregate concrete |
Zdroj: | Sustainability, Vol 13, Iss 5741, p 5741 (2021) Sustainability Volume 13 Issue 10 |
ISSN: | 2071-1050 |
Popis: | The addition of macro-polypropylene fibres improves the stress-strain performance of natural aggregate concrete (NAC). However, limited studies focus on the stress-strain performance of macro-polypropylene fibre-reinforced recycled aggregate concrete (RAC). Considering the variability of coarse recycled aggregates (CRA), more studies are needed to investigate the stress-strain performance of macro-polypropylene fibre-reinforced RAC. In this study, a new type of 48 mm long BarChip macro-polypropylene fibre with a continuously embossed surface texture is used to produce BarChip fibre-reinforced NAC (BFNAC) and RAC (BFRAC). The stress-strain performance of BFNAC and BFRAC is studied for varying dosages of BarChip fibres. Results show that the increase in energy dissipation capacity (i.e., area under the curve), peak stress, and peak strain of samples is observed with an increase in fibre dosage, indicating the positive effect of fibre addition on the stress-strain performance of concrete. The strength enhancement due to the addition of fibres is higher for BFRAC samples than BFNAC samples. The reduction in peak stress, ultimate strain, toughness and specific toughness of concrete samples due to the utilisation of CRA also reduces with the addition of fibres. Hence, the negative effect of CRA on the properties of concrete samples can be minimised by adding BarChip macro-polypropylene fibres. The applicability of the stress-strain model previously developed for macro-synthetic and steel fibre-reinforced NAC and RAC to BFNAC and BFRAC is also examined. |
Databáze: | OpenAIRE |
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