This Architectural Drawing is AutoCAD 2d drawing of Lean concerte Fill Details. Lean Concrete fill refers to a cementitious slurry consisting of a mixture of fine aggregate or filler, water, and cementitious material(s), which is used as a fill or backfill in lieu of compacted earth. Lean concrete: Its role is to provide the uniform surface to the foundation concrete and to prevent the direct contact of foundation concrete with the soil.For more details and information download the drawing file.