18-06-2013, 02:53 PM
A Promising Green Building Material
A Promising Green.ppt (Size: 569.5 KB / Downloads: 192)
What is Bamboo?
Bamboo is a grass, not a wood.
Extensive root system constantly growing underground Replenishes itself naturally
Grows naturally in biologically diverse forests throughout southeast Asia, South and Central America, and the Caribbean
Why Use Bamboo?
Bamboo stands release 35% more oxygen than equivalent stands of trees.
Some bamboo even sequester up to 12 tons of carbon dioxide from the air per hectare.
Bamboo can also lower light intensity and protects against ultraviolet rays.
It is very easy, affordable, and profitable for low income communities to grow and use bamboo.
More Good Reasons
Bamboo is one of the strongest building materials, tensile strength is 28,000 pounds per square inch versus 23,000 pounds per square inch for steel.
In Costa Rica, 1000 houses of bamboo are built annually with material coming only from a 60 hectare bamboo plantation. If an equivalent project used timber, it would require 500 hectares of threatened tropical rainforests.
10-30% annual increase in biomass versus 2 to 5% for trees.
Problems Facing the Bamboo Industry
In many places bamboo is disappearing. In Brazil there were 85,000 sq km of bamboo in 1976, while in 1983 there were only 32,000 sq km. It is feared that within a decade all bamboo in Brazil will be gone. Guadua is among the threatened species because it can only grows at tropical latitudes.
The perception that it is a poor persons housing material. In India, the highest castes use stone to build, the middle castes use wood, and only the lowest castes use bamboo.