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macadam |
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macadamForm 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. macadam a road surface made of compressed layers of small broken stones, esp one that is bound together with tar or asphalt How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Coming nearer and nearer to earth, I wondered if Colonel Boycott ever uses the word "boycott," and how strange it must have seemed to the late MacAdam to walk for miles and miles upon his own name, like a carpet spread out before him. The roads were excellent, and made upon the MacAdam principle, whinstone having been brought for the purpose from the distance of several miles. |
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