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  2. Alker - Wikipedia

    en.wikipedia.org/wiki/Alker

    Alker has primarily been used as a wall construction material; for this purpose, the addition of 8-10% gypsum, 2.5-5% lime, and 20% water to earth produces optimum results [citation needed]. These ratios may change according to the nature and content of clay in the soil.

  3. Hardpan - Wikipedia

    en.wikipedia.org/wiki/Hardpan

    In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water. Some hardpans are formed by deposits in the soil that fuse ...

  4. Gypsum - Wikipedia

    en.wikipedia.org/wiki/Gypsum

    Reclamation of saline soils, regardless of pH. When gypsum is added to sodic (saline) and acidic soil, the highly soluble form of boron (sodium metaborate) is converted to the less soluble calcium metaborate. The exchangeable sodium percentage is also reduced by gypsum application. [41] [42] The Zuiderzee Works uses gypsum for the recovered ...

  5. Soil matrix - Wikipedia

    en.wikipedia.org/wiki/Soil_matrix

    In soils, clay is a soil textural class and is defined in a physical sense as any mineral particle less than 2 μm (8 × 10 −5 in) in effective diameter. Many soil minerals, such as gypsum , carbonates, or quartz, are small enough to be classified as clay based on their physical size, but chemically they do not afford the same utility as do ...

  6. Soil structure - Wikipedia

    en.wikipedia.org/wiki/Soil_structure

    The benefits of improving soil structure for the growth of plants, particularly in an agricultural setting, include: reduced erosion due to greater soil aggregate strength and decreased overland flow; improved root penetration and access to soil moisture and nutrients; improved emergence of seedlings due to reduced crusting of the surface; and ...

  7. Category:Soil-based building materials - Wikipedia

    en.wikipedia.org/wiki/Category:Soil-based...

    Soil-based building materials. Soil is classified in several different ways but generally includes gravel, sand, clay, silt, and peat. Some soil scientists make the distinction that disturbed soil is called dirt because soil science is more complex than just the materials.

  8. Dispersion (geology) - Wikipedia

    en.wikipedia.org/wiki/Dispersion_(geology)

    Dispersion is a process that occurs in soils that are particularly vulnerable to erosion by water. In soil layers where clays are saturated with sodium ions ("sodic soils"), soil can break down very easily into fine particles and wash away. This can lead to a variety of soil and water quality problems, including:

  9. Earthen plaster - Wikipedia

    en.wikipedia.org/wiki/Earthen_plaster

    Clay wall plaster exhibited very high deposition velocities and negligible yields. Clay and materials containing clay (e.g. bricks) consume ozone readily, perhaps because of a reaction catalyzed by metals present in the clay. Clay plaster with very high ozone uptake rates, has certain surface roughness, and porosity.

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