22-10-2012, 05:38 PM
BAMBOO AS STRUCTURAL MATERIAL
Bamboo SD 2010.pptx (Size: 538.81 KB / Downloads: 372)
INTRODUCTION
More than 100 species of bamboo are native to India and a few of them are solid but most them are weak in structure.
All of them are systematically tested so far.
Out of them 16 species are recommended for structural usage in round form.
SPECIES IN GUJARAT
There are 22 species of bamboos reported from the State; the dominant species are Bambusa arundinacea (Katas or Thorny bamboo) and Dendrocalamus strictus (Manvel or Solid bamboo).
Dendrocalamus strictus is economically the most important. It is found in the dry forests over a large part of the State. Bambusa arundinacea is found in mixed moist forests as well as in the moist dry forest of the State.
GROUPING
16 species of bamboo recommended for structural applications are classified in three groups on the basis of their strength properties namely
Modulus of elasticity(E) in green condition
Modulus of rupture ®
Maximum compressive strength (fc max)
MOISTURE CONTENT
The test specimen shall be about 25mm in length and 25 mm in width and having full wall thickness.
It shall be weighed (mi) and then dried in a hot air oven at a temperature of 103 ‘c for 24 h.
The weighing shall be carried out and recorded every 2 h until the difference between successive weighing does not exceed 0.01 g, when drying shall be completed.
The final mass shall be considered as the oven dry mass (m0)
Moisture Content percentage= (mi – m0/ mi) x 100