BMB PROPERTIES :
BMB compare favorably with plywood in terms of durability, stability and versatility. They are highly resistant to water, termites, borers, insects, wood rotting fungi and abrasion and are able to withstand severe climatic conditions. The strength and durability of BMB comes basically from the inherent properties of bamboo, mat weaving pattern and adhesive used in bonding. Resistance of BMB to fire is on par with the resistance of plywood treated with fire retardant chemicals. Dipping of mats in phenol formaldehyde resin provide natural resistance to fire.
An important property of BMB is its modulus of rigidity (shear modulus) which far exceeds modulus of rigidity of plywood due to herring bone weaving pattern. The ratio of modulus of rigidity to modulus of elasticity for BMB exceeds 1.5, where as for plywood it is less than 0.1. BMB in the thickness range of 2mm to 6mm are far more flexible than plywood to be bent along and across the length of the board. This is very advantageous in structural applications of BMB such as Wall bracing, roof diaphragm, web beams, stressed skin panels.
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PHYSICAL MECHANICAL PROPERTIES OF BMB
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| PROPERTY |
IS Specification IS:13958:1994 |
Bamboo Species
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| DENSITY Kg/M3 |
500-900
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809
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890
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711
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766
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| INTERNAL STRENGTH N/mm2 | |||||
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Dry
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0.70
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1.86
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1.33
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2.42
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2.18
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Wet
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0.50
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1.42
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1.10
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2.14
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1.97
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| SURFACE STRENGTH N/mm2 | |||||
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Dry
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4.50
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11.20
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8.06
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11.23
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11.42
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Wet
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3.00
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8.40
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6.05
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10.47
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11.42
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Standard Specification:
The Bureau of Indian Standards, The National Standards Body of India has already brought out an Indian Standard Specification IS:13958-1994 for BMB for general purpose. This is the only standard available on the material world wide.
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BMB TECHNOLOGY ADOPTION |
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UNIT CAPACITY 129000 SHEETS PER YEAR CAPITAL INVESTMENT: 202 Lakh Rs. RECURRING COSTS : 465.84 Lakh Rs. |
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ENVIRONMENT
FRIENDLY REPLACES WOOD/PLYWOOD AND CAN SAVE FORESTS 25% SUBSTITUTION OF PLYWOOD WITH BMB WILL RESULT IN SAVING 30000 Ha OF FORESTS EVERY YEAR (INBAR Tcchnical Repo #12) |
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| Technology Adoption | |
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INDUSTRIES IN
PRODUCTION COSMICRAFT, Shillong, Meghalaya Bamboo Corporation,
Angamalli, Kerala GRAM VIKAS, Berhampur, Orissa.
SUPERNATURAL PLY, Chandrapur, Maharastra, for BMB
BAIF, Pune, Maharastra for Bamboo Mat Trays
BMB M/S Timpack Ltd. Meghalay |
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