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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.
He adds that the eco-domes are much faster to build than a standard home. Prices range from around 2,500 Moroccan dirhams ($247) per square meter to 4,500 dirhams ($445), and can vary according to ...
A soil survey should list the coefficient of linear extensibility (COLE) value. [2] Professional soil scientists can also analyze samples of a soil to determine its shrink-swell capacity. [2] Expansive soils will form large cracks, in roughly polygonal shapes, on the surface of the soil during dry periods. [3]
A small "underground home" built in the style of Oehler, as only a simple, non-waterproofed hole in ground with simple planks and a plastic sheet to a wall, despite using free labour (ignoring the opportunity costs of not having time to go to work) and recycled materials, e.g. windows and planks for the wall, is estimated to be 30% cheaper to ...
Expansive soils like clay expand and shrink with moisture changes, causing foundation movement and settlement. Loose or poorly compacted soil can lead to uneven settling. Inadequate drainage around a building can lead to excessive soil moisture, exerting pressure on the foundation. This can result in movement, heaving, or settling.
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Expansive clays have an expanding crystal lattice in a 2:1 ratio; however, there are 2:1 non-expansive clays. [2] Mitigation of the effects of expansive clay on structures built in areas with expansive clays is a major challenge in geotechnical engineering. Some areas mitigate foundation cracking by watering around the foundation with a soaker ...
Soils with low clay content, or with no more than 15% non-expansive clay, are suitable for stabilized earth. [20] The clay percentage may be reduced by adding sand, if available. [ 21 ] If there is more than 15% clay it may take more than 10% cement to stabilize the soil, which adds to the cost. [ 20 ]
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