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  ESCSI, The Expanded, Shale, Clay and Slate Institute is a trade association for manufacturers of structural lightweight aggregate that is used in lightweight concrete, low density concrete, lightweight concrete masonry, lightweight chip seal and lightweight fill
  ESCSI, The Expanded, Shale, Clay and Slate Institute is a trade association for manufacturers of structural lightweight aggregate that is used in lightweight concrete, low density concrete, lightweight concrete masonry, lightweight chip seal and lightweight fill
  aggregate aggregates and clay environmentally expanded institute kiln lightweight produced rotary shale sla slate structural
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