What is Heartwood? As a tree increases in age and diameter an inner portion of the sapwood becomes inactive and finally ceases to function, as the cells die. The inert or dead portion is called heartwood. Its name derives solely from its position and not from any vital importance to the tree. Mineral deposits, gums and […]
Concrete | Advantages and Disadvantages of Concrete
Concrete Concrete is an artificial stone-like material used for various structural purposes. It is made by mixing a binding material (as cement) and various aggregates (inert materials), such as sand, stone chips, brick chips, brick chips, pebbles, gravel, shale, etc with water and allowing the mixture to harden by hydration. Basic advantages and disadvantages of […]
