Mud
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2008-07-10T04:33:04Z
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{{Unreferenced|date=June 2007}}
[[Image:Mud2.jpg|right|thumb|Dried mud with wind-blown stones]][[Image:Dead Sea mud man by David Shankbone.jpg|thumb|Some people believe mud contains cosmetic or healing properties, such as this man at the [[Dead Sea]].]]
'''Mud''' is a liquid or semi-liquid mixture of water and some combination of [[soil]], [[silt]], and [[clay]]. Ancient mud deposits harden over [[geological]] time to form [[siltstone]] or solid, mudrock lutites. When geological deposits of mud are formed in [[estuaries]] the resultant layers are termed '''[[bay mud]]s'''. Mud is closely related to [[slurry]] and [[sediment]].
Mud, in the [[construction]] industry, refers to wet [[plaster]], [[stucco]], [[cement]] or other similar substances.
In [[Ceramic|ceramics]], the making of liquid mud (called slip) is a stage in the process of refinement of the materials, since larger particles will settle out of the liquid.
Mud is similar to [[muck (soil)|muck]], but lacking significant quantities of [[humus]], and often containing higher proportions of [[sand]].
== As habitat ==
Mud can provide a home for numerous types of animals, including varieties of [[worm]]s, [[frog]]s, [[snail]]s, [[clam]]s, and [[crayfish]]. Other animals, such as [[pig]]s and [[elephants]] bathe in mud in order to cool off and protect themselves from the [[sun]]. Humans have also used mud as a building material, or a sealant material.
==Problems ==
[[Image:Lorry stuck in mud 15l07.JPG|right|thumb|A lorry stuck in mud]]
Clay soil can pose problems for traffic when moisture is present. A road built upon such soil may become stable over time as the packing of the soil will make it more water-resistant. However, any attempt to grade it can be disastrous, since excess water can then enter the surface and will be worked in by traffic, transforming portions of the road into a mud bog that can trap vehicles. The typical solution in road building is to add layers of crushed stone. The stone particles will interlock and distribute the weight of a vehicle over a larger surface area. Proper drainage is also essential when low spots are encountered by the road, usually requiring the addition of culverts to pass water underneath the elevation of the road.
Buildings constructed upon clay soil must also be properly drained around their perimeter, particularly where a perimeter [[Foundation (architecture)|foundation]] (rather than a monolithic slab) is used. As clay will expand and soften when moisture is added, the resultant mud will squeeze out from underneath the foundation, however, in the next dry cycle it will contract, but the clay squeezed out will not return. Over a number of such cycles the foundation can sink in the moisture-cycled locations, possibly causing both wall and foundation cracks. Maintaining a constant moisture level in firm soil is important and can be effected by appropriate landscaping and landscaping maintenance. Where drainage is toward a building a [[French drain]] may be installed to route water around the building.
==In pop culture==
Mud is used in [[mud wrestling]], as a form of entertainment. A [[mud bath]] is an alternative-medicine treatment. It can also be used in a [[Dunk tank|Dunk Tank]].
==See also==
* [[Muck (soil)]]
* [[Mudcrete]]
* [[Mud volcano]]
* [[Peloid]]
* [[Drilling mud]]
[[Category:Aquatic ecology]]
[[Category:Soil]]
[[ay:Ñiq'i]]
[[cs:Bahno]]
[[da:Mudder]]
[[de:Schlamm]]
[[et:Muda]]
[[es:Barro]]
[[eo:Ŝlimo]]
[[eu:Lokatz]]
[[fr:Boue]]
[[fa:گِل]]
[[hi:मिट्टी]]
[[id:Lumpur]]
[[it:Fango]]
[[he:בוץ]]
[[hu:Iszap]]
[[nl:Modder]]
[[ja:泥]]
[[pt:Lama]]
[[ru:Грязь]]
[[fi:Liete]]
[[tr:Çamur]]
[[uk:Шлам]]
[[yi:מאראסט]]
[[zh:泥]]