Behavior Of Bamboo Research Articles

Behavior of Bamboo and Jute Geocell Overlaying Soft Subgrade under Repeated Wheel Loading

Behavior of Bamboo and Jute Geocell Overlaying Soft Subgrade under Repeated Wheel Loading

Comparison on the Behaviour of Bamboo and Polypropylene Fibre in Soil Stabilization

Abstract: In the practice of geotechnical engineering, soil improvement is regarded as one of the most significant solutions, particularly in the case of weak soil conditions. Expansive soil exposed to climatic changes and moisture content, experiences a significant volume shift. Building foundations, paving structures, irrigation systems, and other geotechnical engineering projects are just a few examples. To prevent swelling and shrinkage characteristics, stabilizing the expansive soil is crucial. For considerations of sustainability and economy, stabilizing material selection is crucial. In this project, the soil stabilization is accomplished using reasonably priced and easily accessible materials like bamboo fiber and polypropylene fibre. Soil is replaced by NaOH treated bamboo fibre from 0.2 to 1% at the interval of 0.2% and the same is repeated by replacing the soil with 1% to 3% at the interval of 0.5%. It was observed that, there is marginal increase in dry density of the treated soil samples and reduction compressibility. The maximum Unconfined Compressive Strength (UCS) was obtained for optimum 0.4% of bamboo fibre and 1.5% of polypropylene fibre with replacement of soil. The performance of bamboo fibre was compared with that of polypropylene fibre. The bamboo fibre showed better results than polypropylene fibre.

Sustainable Construction Using Bamboo as Flexural Members

Concrete is the largely using construction material. But it possesses some limitations in its application. The pollution created by cement is one of the major problems. Also the steel will become a scarce material after 20 or 30 years, so that, we should go for some sustainable building materials. The material should be also renewable. The significance of bamboo as a construction material arises in this situation.It is proven that bamboo possesses good tensile strength as well as compressive strength [1]. This material is also renewable and eco-friendly. Studies are conducted to analyze the performance of bamboo in place of reinforcement.This paper discuss about the physical and mechanical properties of bamboo and the behaviour of bamboo as a structural beam. The beams are made with bamboo either bolted or tied together. The connection materials are bolts and ropes. Normal strength tests are conducted over beams. The load and deflection is analyzed. It is seen that the load carrying capacity and load- deflection properties are better for steel bolted beam. And it is also comparable with concrete and steel.This type of beams can be used for residential building purposes. By using bamboo structural members, the cost can be reduced. Of course the economic benefit will go to the rural people, who cultivate bamboo. The method is sustainable, economic and possess nearly no pollution to the atmosphere. Since the material is renewable, it is highly reliable.

Impact of fire on Dendrocalamus strictus – a natural green composite building material

In the face of ever increasing demand for energy and the rapid denudation of the environment, composites based on natural materials provide potentially viable alternatives to high embodied energy building materials. Scientists and grassroots organizations are exploring naturally available woody materials to ensure adequate, affordable and appropriate structural components especially for construction needs. Bamboo is one such material that has a great potential, but its behaviour when subjected to fire remains unknown. In order for bamboo ( Dendrocalamus Strictus) to prove itself a viable option, bamboo constructions need to be dimensionally stable and strong enough against fire and biological detrimental agents. This paper presents research on the behaviour of bamboo in a fire and the consequent treatment methods to be adopted for its inclusion in structural components.

Mechanical Behavior of Bamboo Species <i>Guadua angustifolia </i>under Compression along the Thickness of the Culm

The bamboo speciesGuadua angustifoliais a natural functionally graded material with a high potential to help solving the housing deficit in Latin American countries. Bamboo plantations also play an important role to help reducing the devastation of tropical forests. Many studies have demonstrated the excellent mechanical properties of bamboo along the length of the culm. However, other properties like the strength under circumferential tension and shear are low and the associated types of failure are fragile. Therefore, longitudinal fissures are often initiated in the structural joints which avoid taking advantage of the high resistance along the longitudinal direction. To the best of our knowledge, no study has been devoted to study the mechanical behavior of bamboo along the thickness of the culm or radial direction. This characterization may be crucial to improve the performance of the joints in bamboo structures. The aim of this study was to determine the strength and the Young ́s modulus ofGuadua angustifoliaalong the radial direction. Thus, 27 small hexahedral elements of approximately 11mm× 6mm× 7mmwere tested under compression along the thickness of the culm. The stress-strain curves depicted a typical ductile behavior with an average failure strain of 37.8 ± 5.4 %. The failure was characterized by fissures on planes parallel to the fibers and forming angles in the range 35° - 55° with respect to the axis of loading. The secant Young ́s modulus and the radial strength were equal to 44.50 ±9.60MPa, and 18.50 ±4.20MParespectively and there was no significant difference with position along the culm. The initial Young ́s modulus was equal to 96.73 ±52.30MPa, 37.00 ±24.35MPaand 48.90 ±7.31MPafor the bottom, middle and upper portions of the culm and there was a significant difference (p=0.025) between the bottom and middle locations. The high variations of the initial Young ́s modulus may be explained by the irregular form of the surfaces of contact with the testing machine, that were not cut perfectly flat in order to preserve the intact material. These experiments show that Guadua behaves as a ductile material under compression along the thickness of the culm. This property may be used to improve the efficiency of structural joints by applying radial compression.

Three-Point Bending Fracture Behaviors of Bamboo

Bamboo is a typical natural building material, which is longitudinally reinforced by robust fibers. This present paper focuses on the three-point bending fracture behavior of bamboo across and along fiber lengths with dense fiber layer upward and downward. The three-point bending strength of bamboo across the fibers is about ten times higher than that along the bamboo fibers, and the value of three-point bending strength with dense fiber layer downward is higher than that with dense fiber layer upward. Based on the microstructure of the fracture surfaces and the loading curves, different fracture processes are concluded to explain the anisotropy of bamboo.

Acidulation and Regeneration of Bamboo Derived Sorbents for Gas Phase Adsorption of Elemental Mercury

This paper presents results that illustrate the recycling of a bamboo derived sorbent used for the capture of elemental mercury (Hg 0 ). The bamboo derived sorbent used is essentially a HCl functionalized activated carbon prepared from carbonization and CO2 activation of raw bamboo, that could potentially provide an alternative way to existing methods in removing mercury from flue gases from coal-fired plants. In this study, the bamboo derived sorbents were tested in a batch test using a mercury permeation tube as the source and nitrogen as a carrier gas. The recycling or regeneration of an activated carbon is an important issue to address from a coal-fired power plant point of view, and an attempt has been made to test the behavior of bamboo derived sorbents with various treatments including carbonized, carbonized-activated, carbonized-activated-acidulated, and then a follow-up recycled run after sample treatments in gas phase. From the study, it was found that bamboo derived activated carbon can be successfully acidulated using various normalities of HCl where weak solutions can be very effective in functionalizing the surface of the sorbent and capturing mercury. In order to recycle and reuse bamboo derived sorbents, stronger normalities of HCl would be desired.

Analysis of Mechanical Behaviour of Bamboo (Dendrocalamus strictus) by Using FEM

ABSTRACT Tensile strength of bamboo has been experimentally determined parallel and perpendicular to the fibre direction. Different properties are exhibited in two directions in bamboo due to the basic structural difference present in the two directions. Striking differences exist in the distribution of cells within one culm, both horizontally and vertically. Stress and strain values of bamboo under tensile loads are also determined by using the Finite Element Method (FEM) software ABAQUS and the failure load patterns have been generated and analyzed. Flexural strength and deflection in bamboo determined experimentally matches closely with the FEM generated values.