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ABSTRACT
The need to discover new and sustainable building materials has necessitated research in different parts of the world. This study presents a comparative performance of bamboo laminated beams with cypress beams of the same dimensions. Six laminated bamboo beams and three cypress beams were tested in this study. The dimensions of each specimen was 45mm x 95mm x 600mm and tested under two point loading. Experimental results revealed that bamboo laminated beams resisted higher load than cypress beams and had a higher flexural strength of 39kN/mm2 against that of cypress beam of 34kN/mm2. Also, while cypress beams failed in flexure with major cracks, bamboo laminated beams however failed in tension on the lower part of the beams and shear along the grains. In addition, it was observed that bamboo laminated beams took longer duration than cypress beam to fail completely. The study hereby concluded that bamboo laminated beams showed better load carrying capacity than cypress beams.
KEYWORDS: Bamboo, Cypress, Lamination, Beams, adhesive, failure pattern
I. Introduction
In recent times, it has become more and more essential to discover opportunities for new and sustainable building materials due to drop in level of resource availability [1]. Some factors however influence the choice of building materials. These factors include price, appropriateness and design knowledge of those materials. Issues such as renewability of resources, energy efficiency and eco-friendliness are also becoming progressively vital. Studies have shown that bamboo in comparison to timber, which takes years, have the benefit of been harvested in 3-4 years from the time of plantation [2,3], The anatomy of bamboo intemode cross-section also revealed that the strength properties of bamboo increase from inner to outer layer of the culm [4]. Bamboo has been used in various forms to determine its suitability as a construction material. For instance, the potential of bamboo as reinforcement in concrete was investigated by [5] and found that if bamboo reinforced concrete beam is reinforced with steel stirrups, it improves its load carrying capacity. On the other hand, different studies have characterised bamboo composites based on bamboo fibres in polymeric matrix [6] [7] [8] [9], Recently, [10] arranged bamboo stripes in different orientations and investigated the effects of orientation on strength of laminated bamboo beams. Their observations showed that,...