Static flexural behavior of bamboo as a functionally graded material and the effect of heat on dynamic flexural modulus

Azadeh, Arash; Ghavami, Khosrow; Savastano, Holmer; Filho, Romildo Dias Tolêdo; Barbosa, Normando Perazzo

doi:10.1016/j.jobe.2020.101949

Cited by 6 publications

(7 citation statements)

References 27 publications

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“…The bamboo test consists of the bottom, middle, and top portions of bamboo. Based on the results of testing the moisture content of the top bamboo material, the results obtained meet ISO 22157-01-2004 [16] where the water content value of bamboo in maximum water content conditions is 20%, whereas the bottom and middle of bamboo does not meet because it is believed to be the most active part of the bamboo in receiving water from the soil. The results obtained from the average bond strength of U type parallel notch bamboo specimens of 0.79 Mpa and the results of the average adhesive strength of U type non-parallel notch bamboo specimens of 0.69 Mpa.…”

Section: Water Contentmentioning

confidence: 80%

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Bonding Strength of Buluhpring Bamboo Reinforcement Parallel and Non-Parallel Notches U-Type in Concrete

Arifin

Afriansya

Amiruddin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Bamboo plants are one of the natural materials that are often seen growing and quite fast; Bamboo has been extensively researched for use as an alternative to steel reinforcement in concrete construction. Bamboo is not only more accessible, it is also more cost effective and beneficial for the environment. This study examines the bonding strength of bamboo reinforcement in concrete. Buluhpring bamboo from the Gowa area which has been dried and checked for quality is the bamboo material used. A simple cylindrical concrete specimen measuring 150 mm x 300 mm was used for testing the compressive strength of concrete after 28 days and obtained a result of 25.35 MPa. The Pull-Out test was carried out on 28-day cylindrical concrete measuring 150 mm x 300 mm which was planted with parallel and non-parallel U type bamboo reinforcement in it to determine the bond strength of the test object. The result of concrete with parallel bamboo reinforcement type U is 0.79 MPa and concrete with non-parallel bamboo reinforcement type U is 0.69 MPa. Based on the test, concrete with U-type parallel notch bamboo reinforcement is stronger than U-type non-parallel bamboo notch reinforcement.

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Section: Water Contentmentioning

confidence: 80%

“…It is anticipated that this would strengthen the link between bamboo and concrete. Due to the interlocking components between the surface of the reinforcement and the concrete, notched bamboo reinforcement can lessen the effect or expansion caused by air content [16].…”

Section: Introductionmentioning

confidence: 99%

Bonding Strength of Buluhpring Bamboo Reinforcement Parallel and Non-Parallel Notches U-Type in Concrete

Arifin

Afriansya

Amiruddin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The chemical composition of bamboo consists of hemicellulose, cellulose, lignin and extractives. The distribution of fibers are not uniform [5] and the fiber density is increased from the internal face of wall thickness to the external side making the bamboo a functionally graded material.…”

Section: Introductionmentioning

confidence: 99%

“…Engineering Materials: Properties and Processing Technologies Bending Stiffness. The static bending stiffness of un-treated bamboo is reported to be on the average of 29 MPa [5]. From the data of Fig.…”

mentioning

confidence: 98%

Flattening of Bamboo Culm while Softening in Palm Oil and Subsequent Mechanical Characterization

Reyes

Camagay

Heromiano

et al. 2023

MSF

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This paper considers the softening and flattening treatment of Schizostachyum Lumampao Bamboo as part of a process in its preparation for utilization. Bamboo half-culm samples with thicknesses of either 5.00 mm or 6.00 mm was soaked in palm oil at either of two temperatures (100°C or 160°C) with an application of 50 N load to simulate the flattening process for a period of either 2700 sec. (45 mins.) or 3600 sec. (60 mins.). By measuring the height of the bamboo half-culm before and after the thermal treatment, a relationship was derived between the total heat transferred into the bamboo culms and the flattening behavior. Furthermore, after the flattening, the bending strength of the culms exhibited an exponentially decaying trend and the fracture strength a bi-modal behavior which is confirmed by other studies. This study reports a derived parameter designated as the thermodynamic bending stiffness of about 4 MPa for the flattening process.

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“…When exposed to weathering, they undergo changes that can compromise their performance. Evaluation of the mechanical performance of bamboo culm subjected to environmental actions is fundamental to understanding its possible use as a structural material [1].…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of Bamboo: A Study on Changes in Mechanical Performances

et al. 2022

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One of the main concerns in using natural materials in construction, such as bamboo, regards their durability. Ultra violet (UV)irradiation is claimed as a damaging agent; therefore, it is important to study its effect. Several studies have shown that bamboo components such as lignin are subjected to photochemical degradation, but it is not well understood how this affects the mechanical properties of bamboo. The aim of this paper is to explore the correlation between photodegradation and bamboo mechanical performance. Bamboo samples were exposed to accelerated UV ageing for different times (from 6 to 360 h) and then subjected to a four-point bending test. Since one of the ways to stabilize bamboo is to thermally treat it, the tests were conducted on natural untreated bamboo and treated bamboo with a traditional flame treatment. Modifications of the chemical features of the material were analyzed with Fourier Trasform Infra Red (FTIR) spectroscopy, while modifications of the morphological features were analyzed byEnvironmental Scanning Electron Microscopy ESEM and optical microscopy observations. The results show that the bending behavior of bamboo is not compromised by UV exposure up to 360 h. In fact, although a progressive degradation of lignin is reported and cracks in the fiber walls are highlighted from micrographs, no effects were found on the fiber length.

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Static flexural behavior of bamboo as a functionally graded material and the effect of heat on dynamic flexural modulus

Cited by 6 publications

References 27 publications

Bonding Strength of Buluhpring Bamboo Reinforcement Parallel and Non-Parallel Notches U-Type in Concrete

Bonding Strength of Buluhpring Bamboo Reinforcement Parallel and Non-Parallel Notches U-Type in Concrete

Flattening of Bamboo Culm while Softening in Palm Oil and Subsequent Mechanical Characterization

Photodegradation of Bamboo: A Study on Changes in Mechanical Performances

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