what is tarmac
Tarmac (short for tarmacadam, or tar-penetration macadam) is a type of road surfacing material patented by Edgar Purnell Hooley in 1901.The term is also used, with varying degrees of correctness, for a variety of other materials, including tar-grouted macadam, bituminous surface treatments, and modern asphalt concrete.The term is also often used incorrectly to describe airport aprons, ramps, and runways.acadam (crushed rock) roads are prone to rutting and generating dust. Methods to stabilize macadam surfaces with tar date back to at least 1834 when John Henry Cassell, operating from Cassell's Patent Lava Stone Works in Millwall, patented lava stone.