Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars
This paper aims to experimentally investigate the flexural behavior of concrete beams reinforced with glass fiber reinforced polymer (GFRP) bars made of concrete with and without polyethylene terephthalate (PET) waste fiber addition. The test variable covers the structural application of different P...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523007441 |
| _version_ | 1797454532144267264 |
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| author | Azad A. Mohammed Muhammad A. Muhammad Bilal K. Mohammed |
| author_facet | Azad A. Mohammed Muhammad A. Muhammad Bilal K. Mohammed |
| author_sort | Azad A. Mohammed |
| collection | DOAJ |
| description | This paper aims to experimentally investigate the flexural behavior of concrete beams reinforced with glass fiber reinforced polymer (GFRP) bars made of concrete with and without polyethylene terephthalate (PET) waste fiber addition. The test variable covers the structural application of different PET fiber lengths (20 mm and 40 mm). Firstly, several tests were done on ten concrete mixes containing 1–2% PET waste fiber with a 0.25% increment by volume. The mixture's concrete properties, including stress-strain curves, were studied to obtain the optimum percentage of PET fiber. Furthermore, four GFRP reinforced concrete (RC) beams were cast from concrete containing 0% PET fiber (the control beam), 1% PET fiber volumes of 20 mm and 40 mm, and an equal mixture of both lengths. The beams were designed using ACI 440.1R to fail in GFRP rupture. The results showed that compressive strength increased by 8% and 6% using 1% fiber volume of 20 and 40 mm PET fiber, respectively. It was found that PET fiber addition had a negligible effect on changing the ductility, cracking pattern, or failure mode of under reinforced GFRP RC beams. The cracking and ultimate loads are slightly reduced, however, and the corresponding deflections are well reduced, especially when using 40 mm PET fiber. With the use of PET waste fiber, serviceability increased by up to 12% based on deflection limit control (L/240). The addition of 40 mm of PET fiber was found to enhance the beam stiffness by 25%. An analysis method has been proposed to predict the flexural strength of GFRP RC beams made with PET fiber. Moreover, it is recommended to treat the PET fiber surface to improve the fiber-concrete bond when used in non-ductile RC beams. |
| first_indexed | 2024-03-09T15:38:34Z |
| format | Article |
| id | doaj.art-00b4a6fe224f47d09b05b41648893c08 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-09T15:38:34Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-00b4a6fe224f47d09b05b41648893c082023-11-25T04:49:19ZengElsevierCase Studies in Construction Materials2214-50952023-12-0119e02564Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP barsAzad A. Mohammed0Muhammad A. Muhammad1Bilal K. Mohammed2Civil Engineering Department, College of Engineering, University of Sulaimani, Sulaymaniyah, Kurdistan Region, IraqCivil Engineering Department, College of Engineering, University of Sulaimani, Sulaymaniyah, Kurdistan Region, Iraq; Corresponding author.Surveying Department, Sulaimani Technical Institute, Sulaimani Polytechnic University, Sulaymaniyah, Kurdistan Region, IraqThis paper aims to experimentally investigate the flexural behavior of concrete beams reinforced with glass fiber reinforced polymer (GFRP) bars made of concrete with and without polyethylene terephthalate (PET) waste fiber addition. The test variable covers the structural application of different PET fiber lengths (20 mm and 40 mm). Firstly, several tests were done on ten concrete mixes containing 1–2% PET waste fiber with a 0.25% increment by volume. The mixture's concrete properties, including stress-strain curves, were studied to obtain the optimum percentage of PET fiber. Furthermore, four GFRP reinforced concrete (RC) beams were cast from concrete containing 0% PET fiber (the control beam), 1% PET fiber volumes of 20 mm and 40 mm, and an equal mixture of both lengths. The beams were designed using ACI 440.1R to fail in GFRP rupture. The results showed that compressive strength increased by 8% and 6% using 1% fiber volume of 20 and 40 mm PET fiber, respectively. It was found that PET fiber addition had a negligible effect on changing the ductility, cracking pattern, or failure mode of under reinforced GFRP RC beams. The cracking and ultimate loads are slightly reduced, however, and the corresponding deflections are well reduced, especially when using 40 mm PET fiber. With the use of PET waste fiber, serviceability increased by up to 12% based on deflection limit control (L/240). The addition of 40 mm of PET fiber was found to enhance the beam stiffness by 25%. An analysis method has been proposed to predict the flexural strength of GFRP RC beams made with PET fiber. Moreover, it is recommended to treat the PET fiber surface to improve the fiber-concrete bond when used in non-ductile RC beams.http://www.sciencedirect.com/science/article/pii/S2214509523007441PET waste fiber additionFiber lengthGFRP reinforced concrete beamFlexural behaviorCompressive stress-strain curveSplit tensile stress-strain response |
| spellingShingle | Azad A. Mohammed Muhammad A. Muhammad Bilal K. Mohammed Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars Case Studies in Construction Materials PET waste fiber addition Fiber length GFRP reinforced concrete beam Flexural behavior Compressive stress-strain curve Split tensile stress-strain response |
| title | Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars |
| title_full | Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars |
| title_fullStr | Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars |
| title_full_unstemmed | Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars |
| title_short | Effect of PET waste fiber addition on flexural behavior of concrete beams reinforced with GFRP bars |
| title_sort | effect of pet waste fiber addition on flexural behavior of concrete beams reinforced with gfrp bars |
| topic | PET waste fiber addition Fiber length GFRP reinforced concrete beam Flexural behavior Compressive stress-strain curve Split tensile stress-strain response |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523007441 |
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