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John Loudon McAdam, 1830, National Gallery, London. John Loudon McAdam (23 September 1756 [1] – 26 November 1836) was a Scottish civil engineer and road-builder. He invented a new process, "macadamisation", for building roads with a smooth hard surface, using controlled materials of mixed particle size and predetermined structure, that would be more durable and less muddy than soil-based tracks.
Macadam is a type of road construction pioneered by Scottish engineer John Loudon McAdam c. 1820, in which crushed stone is placed in shallow, convex layers and compacted thoroughly. A binding layer of stone dust (crushed stone from the original material) may form; it may also, after rolling, be covered with a cement or bituminous binder to ...
Tarmacadam is a concrete road surfacing material made by combining tar and macadam (crushed stone and sand), patented by Welsh inventor Edgar Purnell Hooley in 1902. It is a more durable and dust-free enhancement of simple compacted stone macadam surfaces invented by Scottish engineer John Loudon McAdam in the early 19th century.
John Loudon McAdam (1756–1836), Scottish engineer noted for inventing the process of "macadamization" of roads John McAdam (politician) (1807–1893), Irish-born politician in New Brunswick, Canada John Macadam (1827–1865), Australian (Scottish-born) chemist, medical teacher and politician, after whom the Macadamia nut is named
During Industrial Revolution, John Loudon McAdam (1756–1836) designed the first modern highways, using inexpensive paving material of soil and stone aggregate , and the embanked roads a few centimeters higher than the surrounding terrain to cause water to drain away from the surface.
Map of Roman roads in 125CE Road construction, depicted on Trajan's Column. With the advent of the Roman Empire, there was a need for armies to be able to travel quickly from one area to another, and the roads that existed were often muddy, which greatly delayed the movement of large masses of troops. To solve this problem, the Romans built ...
Construction of the first macadamized road in the United States (1823). In the foreground, workers are breaking stones "so as not to exceed 6 ounces in weight or to pass a two-inch ring". [14] It was another Scottish engineer, John Loudon McAdam, who designed the first modern roads.
John Loudon McAdam (1756–1836 ... received the first authorization to build a public-utility fast road in 1921, and completed the construction (one lane in each ...