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What is Light Expanded Clay Aggregate (ECA®) and how is it made?

What is Light Expanded Clay Aggregate (ECA®) and how is it made?

Light Expanded Clay Aggregateor ECA® is a type of lightweight, porous ceramic material produced by heating natural clay at high temperatures in a rotary kiln. The process causes the clay to bloat or expand, similar to popcorn, and forms thousands of tiny, hard mineral structures. These structures are highly porous, making them excellent for retaining water and air.