expanded clay aggregate
Sign in to saveAlso known as Expanded clay pellets
substrate suitable for hydroculture applications
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Article
Heat-expanded lightweight pebbles
Expanded clay (exclay) or lightweight expanded clay aggregate (LECA) 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. LECA has an approximately round or oblong shape due to circular movement in the kiln and is available in different sizes and densities. LECA is used to make lightweight concrete products and other uses.
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