Lightweight Cellular Concrete (LCC) is a versatile material with a range of unit weights and strengths. Closed-cell LCC (low permeability) was patented in 1923 and open-cell (permeable) LCC was introduced for high groundwater sites and for drainage. Learn about the advantages of LCC in geotechnical applications including reduced material use, trucking, site footprint, schedule, and cost. Projects include load and settlement reduction for embankments, retaining and basement walls, and protection for tunnels with seismic crush zones. Find out more about the only flowable lightweight fill.