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This road was completed in 1823, using McAdam's road techniques, except that the finished road was compacted with a cast iron roller instead of relying on road traffic for compaction. [15] The second American road built using McAdam principles was the Cumberland Road which was 73 miles (117 km) long and was completed in 1830 after five years of ...
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.
Asphalt batch mix plant A machine laying asphalt concrete, fed from a dump truck. Asphalt concrete (commonly called asphalt, [1] blacktop, or pavement in North America, and tarmac or bitumen macadam in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, and the core of embankment dams. [2]
Although McAdam had been adamantly opposed to the filling of the voids between his small cut stones with smaller material, in practice road builders began to introduce filler materials such as smaller stones, sand, and clay, and it was observed that these roads were stronger as a result. Macadam roads were being built widely in the United ...
The NHA is the custodian of 39 national highways, motorways, expressways and strategic roads, combining for a total length of 12,131 kilometers (4.6% of the national road network). The NHA is committed to provide a safe, modern and efficient transportation system and play an important role in the development of Pakistan's micro and macro ...
Pages in category "Urdu-language books" The following 64 pages are in this category, out of 64 total. This list may not reflect recent changes. A. Aab-e hayat (Azad)
M-2 motorway in the Salt Range M-2 motorway exit to Sargodha. Pakistan's motorways are an important part of Pakistan's "National Trade Corridor Project", which aims to link Pakistan's three Arabian Sea ports (Karachi Port, Port Bin Qasim and Gwadar Port) to the rest of the country through its national highways and motorways network and further north with Afghanistan, Central Asia and China.