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macadam
(redirected from macadamed)

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macadam

Form of pavement invented by John McAdam. McAdam's road cross-section consisted of a compacted subgrade of crushed granite or greenstone designed to support the load, covered by a surface of light stone to absorb wear and tear and shed water to the drainage ditches. In modern macadam construction, crushed stone or gravel is placed on the compacted base course and bound together with asphalt cement or hot tar. A third layer to fill the spaces is then added and rolled. Cement-sand slurry is sometimes used as the binder.



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As Wilson observes, "Kilvert has painted England and Wales before they were 'wrecked' by cars, macadamed roads, supermarkets, factory farms, holidays for all--with their attendant holiday-cottages--retirement bungalows, theme parks, science parks, carparks and railway stations called parkway.
Portrait of an Age by Guldager, Carl / Modern Age
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