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A foundation must bear the structural loads imposed upon it and allow proper drainage of ground water to prevent expansion or weakening of soils and frost heaving. While the far more common concrete foundation requires separate measures to ensure good soil drainage, the rubble trench foundation serves both foundation functions at once.
Widely used for low cost and durability. Sheds are normally roofed with this material. Gal iron or Corro was the most extensively used roofing material of 20th century Australia, now replaced in popularity by steel with longer-lasting, coloured, alloy coatings. Copper roofs can last for hundreds of years. Copper roofing offers durability, ease ...
Crushed stone substitutes for roadbuilding include sand and gravel, and slag. Substitutes for crushed stone used as construction aggregates include sand and gravel, iron and steel slag, sintered or expanded clay or shale, and perlite or vermiculite. [7] A crushed stone barge in China Crushed stone laid as a road base
A flooded coat of bitumen is applied over the felts and gravel is embedded in the hot bitumen. Flat roof in Warszawa Centralna railway station in Poland (1975) A main reason for failure of these traditional roofs is ignorance or lack of maintenance. The gravel coating protects the tar underneath from breaking down under UV rays from the sun.
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Paver base is a form of aggregate used in the construction of patios and walkways whose topmost layer consists of mortarless (or "dry-laid") pavers. The first layer in the construction of such a surface is called the subgrade —this is the layer of native material underneath the intended surface.
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