expanded clay

expanded clay

[ik′spand·əd ′klā]
(materials)
A material made from common brick clays by grinding, screening, and then feeding through a gas burner at about 2700°F (1482°C), thus changing the ferric oxide to ferrous oxide and causing the formation of bubbles.

expanded clay

Clay which has been heated to a semiplastic condition and expanded to many times its original volume by the formation of internal gas; used as a lightweight aggregate.
References in periodicals archive ?
Made of plasterboard, Sheet metal, Plastic, Expanded clay, Fibreboard; Installation on the 3rd floor of the clinic.
In addition, we also used the lightweight artificial aggregate from the expanded clay (see European Standards EN 13055-1, EN 14063-1 and EN ISO 9001).
Instead of compost or fibre, small pebbles or expanded clay particles are used for potting bulbs in exactly the same way.
Technology of receiving expanded clay from poorly swelling up clay raw materials.
Considerable differences in effectiveness of fibres strongly depend first of all on aggregate type (polystyrene, pumice, expanded clay, sintered fly ash), secondly on fibre type (straight or hook ended; 5 to 50 mm long) and its content (0.
Follow with a 4cm layer of crushed brick, limestone chippings, gravel or expanded clay granules.
Topics of the 148 papers include the design and testing of prestressed square concrete piles, the performance of expanded clay shale as an embankment backfill, the mechanical properties of an asphalt mixture with bottom ash aggregates, and modeling instruction in an environmental geotechnics course.
Instead, you use inert medium such as rockwool, expanded clay, silicate rock, and coir (coco fiber) for plant support and moisture/ nutrient retention in the root zone.
Advances will be spurred by environmental and land use concerns favoring recycled and secondary aggregate materials, and by rising demand for specialty products such as expanded clay and shale, which are used in applications like bridge decks, where light weight is of extreme importance.
Expanded clay from Norway, known as Leca, replaced the expanded shale media because of quality concerns.
Any number of hydroponic rooting media, such as peat moss, sawdust, wood chips, chipped bark, sand, gravel and crushed rock, gardener's heat-expanded mineral soil conditioners (such as perlite and vermiculite mixed with sand), expanded clay pellets and other chemically stable media are used with varying degrees of success.
benefits include: - manual cleaning and / or weeding: - sand filtering basins (20 filters with a unit area of approximately 1000 m 2 ) using brooms, Specific rakes with water jet (washing devices on the surface) and "spear lances" (deep water washing devices) loaned by eau de paris; - routers (10 filters made of expanded clay balls with a unit area of about 145 m 2 ) and prefilters (12 sand-based filters with a unit area of about 145 m 2 ) to the help of fire hoses lent by eau de paris; - works of the "flotation" workshops using fire hoses lent by eau de paris; - roof terraces of industrial buildings.

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