Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally

The synthetic fiber reinforced polymer (FRP) composite is an effective method for strengthening the reinforced concrete (RC) member externally. However, high cost, environmental impact, and adverse effects on human health are the major limitation of FRP composite. Thus, the natural fiber reinforced...

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Main Author:	Tong, Foo Sheng
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/25505/ http://umpir.ump.edu.my/id/eprint/25505/ http://umpir.ump.edu.my/id/eprint/25505/1/Investigating%20the%20physico-mechanical%20properties%20of%20bamboo%20fiber%20reinforced%20composite.pdf

id	ump-25505
recordtype	eprints
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Tong, Foo Sheng Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
description	The synthetic fiber reinforced polymer (FRP) composite is an effective method for strengthening the reinforced concrete (RC) member externally. However, high cost, environmental impact, and adverse effects on human health are the major limitation of FRP composite. Thus, the natural fiber reinforced polymer composite (NFRPC) for the strengthening of RC structure is the trending interests in the construction industry. This study presented an experimental investigation on the structural behaviour of RC beams with openings in shear and flexure strengthened using bamboo fiber reinforced composite (BFRC) plates. The purposes of this work are to characterize the physico-mechanical properties of Gigantocholoa scortechinii Gamble (G. scortechinii) fiber and unidirectional BFRC plate. The load-deflection, cracking patterns, and failure mode of BFRC plates strengthened RC beams were also studied. The bamboo culms were treated with different sodium hydroxide (NaOH) concentrations (0, 5, 10, and 15 %) and soaking durations (0, 24, 48, and 72 hours) before subjected to the mill rolling process. The physico-mechanical characterizations were performed to evaluate the optimum treatment parameters for the suitability of fiber as reinforcement in the polymer composite. The BFRC plates were fabricated using an open mould hand lay-up method with different types of thermoset matrix (epoxy, polyester, and vinylester resin) and various fiber loadings (0, 10, 20, 30, and 40 %). The physico-mechanical properties of BFRC plates were examined to determine the optimal mix ratio. A total of 12 beams were tested in Phase 1 (shear strengthening) and Phase 2 (flexural strengthening) under four-point bending until failure. Each phase consists of two control beams, two beams of which was tested with or without the strengthening of BFRC plates. For flexural strengthening, the BFRC plates were bonded at the bottom soffit along the middle span, whereas the BFRC plates were bonded at both top and bottom chords of the openings for shear strengthening. From the obtained results, the surface morphology, crystallinity index, thermal stability, and tensile properties of fiber showed a gradual improvement with increasing NaOH concentrations and soaking durations due to the removal of non-cellulosic constituents. The bamboo fiber treated at 10 % concentrations and 48 hours presented the most outstanding physico-mechanical properties among all the treatment conditions. The physico-mechanical properties of the BFRC plates were enhanced with the increase of fiber content regardless the type of matrix. At 40 % of fiber loading, the bamboo fiber reinforced with the epoxy matrix (BFREC) was confirmed as the optimum ratio by exhibiting the highest physico-mechanical properties. The inclusion of large circular openings in the shear zones led to a reduction in ultimate load by 53.5 %. As compared to the beam with unstrengthened openings, the regained beam capacity by shear strengthening was 52.14 %. The ultimate load-carrying capacity of the flexural strengthened beams had improved the failure load by 7 %. The strengthened beams also exhibited higher first crack load. Both flexural and shear strengthening effectively mitigated the cracks propagation and improved the beam ductility. The obtained findings indicate that the unidirectional BFREC plate could be utilized as external strengthening material for structural strengthening.
format	Thesis
author	Tong, Foo Sheng
author_facet	Tong, Foo Sheng
author_sort	Tong, Foo Sheng
title	Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
title_short	Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
title_full	Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
title_fullStr	Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
title_full_unstemmed	Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally
title_sort	investigating the physico-mechanical properties of bamboo fiber reinforced composite (bfrc) plates and its effects on strengthening of rc beams externally
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/25505/ http://umpir.ump.edu.my/id/eprint/25505/ http://umpir.ump.edu.my/id/eprint/25505/1/Investigating%20the%20physico-mechanical%20properties%20of%20bamboo%20fiber%20reinforced%20composite.pdf
first_indexed	2023-09-18T22:39:12Z
last_indexed	2023-09-18T22:39:12Z
_version_	1777416800524304384
spelling	ump-255052019-07-24T07:54:32Z http://umpir.ump.edu.my/id/eprint/25505/ Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally Tong, Foo Sheng TA Engineering (General). Civil engineering (General) The synthetic fiber reinforced polymer (FRP) composite is an effective method for strengthening the reinforced concrete (RC) member externally. However, high cost, environmental impact, and adverse effects on human health are the major limitation of FRP composite. Thus, the natural fiber reinforced polymer composite (NFRPC) for the strengthening of RC structure is the trending interests in the construction industry. This study presented an experimental investigation on the structural behaviour of RC beams with openings in shear and flexure strengthened using bamboo fiber reinforced composite (BFRC) plates. The purposes of this work are to characterize the physico-mechanical properties of Gigantocholoa scortechinii Gamble (G. scortechinii) fiber and unidirectional BFRC plate. The load-deflection, cracking patterns, and failure mode of BFRC plates strengthened RC beams were also studied. The bamboo culms were treated with different sodium hydroxide (NaOH) concentrations (0, 5, 10, and 15 %) and soaking durations (0, 24, 48, and 72 hours) before subjected to the mill rolling process. The physico-mechanical characterizations were performed to evaluate the optimum treatment parameters for the suitability of fiber as reinforcement in the polymer composite. The BFRC plates were fabricated using an open mould hand lay-up method with different types of thermoset matrix (epoxy, polyester, and vinylester resin) and various fiber loadings (0, 10, 20, 30, and 40 %). The physico-mechanical properties of BFRC plates were examined to determine the optimal mix ratio. A total of 12 beams were tested in Phase 1 (shear strengthening) and Phase 2 (flexural strengthening) under four-point bending until failure. Each phase consists of two control beams, two beams of which was tested with or without the strengthening of BFRC plates. For flexural strengthening, the BFRC plates were bonded at the bottom soffit along the middle span, whereas the BFRC plates were bonded at both top and bottom chords of the openings for shear strengthening. From the obtained results, the surface morphology, crystallinity index, thermal stability, and tensile properties of fiber showed a gradual improvement with increasing NaOH concentrations and soaking durations due to the removal of non-cellulosic constituents. The bamboo fiber treated at 10 % concentrations and 48 hours presented the most outstanding physico-mechanical properties among all the treatment conditions. The physico-mechanical properties of the BFRC plates were enhanced with the increase of fiber content regardless the type of matrix. At 40 % of fiber loading, the bamboo fiber reinforced with the epoxy matrix (BFREC) was confirmed as the optimum ratio by exhibiting the highest physico-mechanical properties. The inclusion of large circular openings in the shear zones led to a reduction in ultimate load by 53.5 %. As compared to the beam with unstrengthened openings, the regained beam capacity by shear strengthening was 52.14 %. The ultimate load-carrying capacity of the flexural strengthened beams had improved the failure load by 7 %. The strengthened beams also exhibited higher first crack load. Both flexural and shear strengthening effectively mitigated the cracks propagation and improved the beam ductility. The obtained findings indicate that the unidirectional BFREC plate could be utilized as external strengthening material for structural strengthening. 2018-08 Thesis NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/25505/1/Investigating%20the%20physico-mechanical%20properties%20of%20bamboo%20fiber%20reinforced%20composite.pdf Tong, Foo Sheng (2018) Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally. Masters thesis, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:105488&theme=UMP2

Investigating the physico-mechanical properties of bamboo fiber reinforced composite (BFRC) plates and its effects on strengthening of rc beams externally

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