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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 ...
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.
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.
An entrepreneur operating a Route 66 business at Arcadia wants to promote towns along one of the Mother Road's most scenic stretches in Oklahoma.
In the early 2000s, Oklahoma was 48th in the nation for bridge conditions. Today, the state ranks in the top 10 nationally for good bridge conditions. How Oklahoma has turned around and fixed ...
It was another Scottish engineer, John Loudon McAdam, who designed the first modern roads. He developed an inexpensive paving material of soil and stone aggregate (known as macadam). His road building method was simpler than Telford's yet more effective at protecting roadways: he discovered that massive foundations of rock upon rock were ...
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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