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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, 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.
An illustration of the first macadamized road in the United States between Boonsboro and Hagerstown in Maryland in 1823; in the foreground, workers are breaking stones "so as not to exceed 6 ounces (170 g) in weight or to pass a two-inch (5 cm) ring".
Asphalt concrete, a macadamising material using asphalt instead of tar which has largely superseded tarmacadam; Tarmac is sometimes incorrectly used, mostly by news media, as a term for any paved surface of an airport regardless of material, including the Airport apron; Taxiway; Runway
Urdu Name Roman Urdu Name Remarks Flax seeds: السی: Aalsi Star anise: بادیان : Baadyan Ginger: ادرک: Adrak Grated or paste Mango powder: آمچور: Amchoor Dried unripe mango slices or powder Pakistani pickles: اچار: Achar Different types of pickles Parsley: جعفری: Jafari Carom seed اجوائن: Ajwain Emblica ...
In some cases words have entered the English language by multiple routes - occasionally ending up with different meanings, spellings, or pronunciations, just as with words with European etymologies. Many entered English during the British Raj in colonial India. These borrowings, dating back to the colonial period, are often labeled as "Anglo ...
Zillow predicts the US housing market will keep shifting in 2025.. The real-estate firm says the average home value rose by 2.6% annually in October. It says homebuying activity should pick up ...
The Urdu Wikipedia (Urdu: اردو ویکیپیڈیا), started in January 2004, is the Standard Urdu-language edition of Wikipedia, a free, open-content encyclopedia. [1] [2] As of 13 December 2024, it has 215,505 articles, 187,938 registered users and 7,427 files, and it is the 54th largest edition of Wikipedia by article count, and ranks 20th in terms of depth among Wikipedias with over ...