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- Expansive_clay abstract "Expansive clay is a clay that is prone to large volume changes that are directly related to changes in water content. Soils with a high content of expansive clay can form deep cracks in drier seasons or years; such soils are called vertisols. Soils with smectite clay minerals, including montmorillonite and bentonite, have the most dramatic shrink-swell capacity.The mineral make-up of this type of soil is responsible for the moisture retaining capabilities. All clays consist of mineral sheets packaged into layers, and can be classified as either 1:1 or 2:1. These ratios refer to the proportion of tetrahedral sheets to octahedral sheets. Octahedral sheets are sandwiched between two tetrahedral sheets in 2:1 clays, while 1:1 clays have sheets in matched pairs. Expansive clays have an expanding crystal lattice in a 2:1 ratio; however, there are 2:1 non-expansive clays.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 hose during dry conditions. This process can be automated by a timer, or using a soil moisture sensor controller such as the product offered by WaterGreat LLC. Even though irrigation is expensive, the cost is small compared to repairing a cracked foundation. A laboratory test to measure the expansion potential of soil is ASTM D 4829.".
- Expansive_clay wikiPageExternalLink foundation.php.
- Expansive_clay wikiPageID "5144570".
- Expansive_clay wikiPageRevisionID "606580831".
- Expansive_clay hasPhotoCollection Expansive_clay.
- Expansive_clay subject Category:Sediments.
- Expansive_clay subject Category:Soil_mechanics.
- Expansive_clay subject Category:Types_of_soil.
- Expansive_clay type Matter100020827.
- Expansive_clay type PhysicalEntity100001930.
- Expansive_clay type Sediment109428967.
- Expansive_clay type Sediments.
- Expansive_clay comment "Expansive clay is a clay that is prone to large volume changes that are directly related to changes in water content. Soils with a high content of expansive clay can form deep cracks in drier seasons or years; such soils are called vertisols. Soils with smectite clay minerals, including montmorillonite and bentonite, have the most dramatic shrink-swell capacity.The mineral make-up of this type of soil is responsible for the moisture retaining capabilities.".
- Expansive_clay label "Arcilla expansiva".
- Expansive_clay label "Expansive clay".
- Expansive_clay label "Zwelklei".
- Expansive_clay sameAs Arcilla_expansiva.
- Expansive_clay sameAs Zwelklei.
- Expansive_clay sameAs m.0d4v1t.
- Expansive_clay sameAs Q1626102.
- Expansive_clay sameAs Q1626102.
- Expansive_clay sameAs Expansive_clay.
- Expansive_clay wasDerivedFrom Expansive_clay?oldid=606580831.
- Expansive_clay isPrimaryTopicOf Expansive_clay.