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Clay is a type of fine-grained natural soil material containing clay minerals [1] (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 4). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide .
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Clay cannot be resolved by optical microscopes as its particles are 0.002 mm (7.9 × 10 −5 in) or less in diameter and a thickness of only 10 angstroms (10 −10 m). [16] [17] In medium-textured soils, clay is often washed downward through the soil profile (a process called eluviation) and accumulates in the subsoil (a process called ...
Expansive clay, also called expansive soil, is a clay soil prone to large volume changes (swelling and shrinking) directly related to changes in water content. [1] Soils with a high content of expansive minerals can form deep cracks in drier seasons or years; such soils are called vertisols .
Daily 5,167 This Newspaper was first part of Party of Labour of Albania (1944–1992) and now Socialist Party of Albania (1992–present) Tema: Theme Unaffiliated right Daily 5,000 Republika: Republik Republican Party Daily 5,000 Part of Republican Party of Albania: Gazeta 55: Newspaper 55 October 18, 1997 Anti-communist, Liberal: Daily 4,500
If the soil is too high in clay or salts (e.g. saline sodic soil), adding gypsum, washed river sand and organic matter (e.g.municipal solid waste) will balance the composition. [248] Adding organic matter, like ramial chipped wood or compost, to soil which is depleted in nutrients and too high in sand will boost its quality and improve production.
Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a lightweight aggregate made by heating clay to around 1,200 °C (2,190 °F) in a rotary kiln. The heating process causes gases trapped in the clay to expand, forming thousands of small bubbles and giving the material a porous structure.
The paper was published six times a week in tabloid format and had its headquarters in Tirana. [1] It was owned by a private foundation led by Faik Konica. [1] In the early 2000s the paper was owned by Ylli Rakipi. [2] [3] The paper had no political affiliation. [4] At the beginning of the 2000s, its circulation was 5,750 copies. [4]