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  2. Expanded clay aggregate - Wikipedia

    en.wikipedia.org/wiki/Expanded_clay_aggregate

    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.

  3. Passive hydroponics - Wikipedia

    en.wikipedia.org/wiki/Passive_hydroponics

    Semi-Hydroponics (Semi-Hydro or S/H) was the first passive hydroponic technique utilized for orchids, originating in the early 1990s, using Lightweight Expanded Clay Aggregate (LECA) as a medium in solid-bottomed containers, into which one or two, small-diameter holes were placed in the sidewall, setting the depth of the internal reservoir.

  4. Hydroponics - Wikipedia

    en.wikipedia.org/wiki/Hydroponics

    Expanded clay aggregate. Baked clay pellets are suitable for hydroponic systems in which all nutrients are carefully controlled in water solution. The clay pellets are inert, pH-neutral, and do not contain any nutrient value. The clay is formed into round pellets and fired in rotary kilns at 1,200 °C (2,190 °F). This causes the clay to expand ...

  5. Leca - Wikipedia

    en.wikipedia.org/wiki/Leca

    Lightweight expanded clay aggregate; Lutheran Evangelical Church in Africa—Zambia Diocese; Places ... Francine Leca (1938-2024), French surgeon and professor;

  6. Lemvigh-Müller - Wikipedia

    en.wikipedia.org/wiki/Lemvigh-Müller

    This was the case, for example, with the patent for the manufacture of lightweight concrete slabs, which Lemvigh-Müller & Munck A/S acquired in the mid-1930s. In 1939, A/S Dansk Betonklinker was founded, and the first rotary kiln in Sydhavnen began firing the product that was to become success under the name LECA (Light Expanded Clay Aggregates).

  7. Talk:Expanded clay aggregate - Wikipedia

    en.wikipedia.org/wiki/Talk:Expanded_clay_aggregate

    The expanded clay is obtained by the heating of different types of clay, at a temperature of approximately 1200 °C, using a rotary kiln. The principal characteristic of the expanded clay is to have a density three times smaller than normal aggregates. Usually, the density of this type of clay is 350 kg/m 3. [1]

  8. Mycelium-based materials - Wikipedia

    en.wikipedia.org/wiki/Mycelium-based_materials

    In a study comparing lightweight expanded clay aggregate (LECA) and expanded vermiculite (EV), two materials used to make concrete, to a mycelium grown brick, the mycelium grown brick was found to be a better insulator. [13] These results are similar when comparing a different mycelium based composite with extruded polystyrene.

  9. Expansive clay - Wikipedia

    en.wikipedia.org/wiki/Expansive_clay

    Expansive clay is a clay soil that is prone to large volume changes (swelling and shrinking) that are 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 .

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