Insulating concrete form or insulated concrete form (ICF) is a system of formwork for reinforced concrete usually made with a rigid thermal insulation that stays in place as a permanent interior and exterior substrate for walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked (without mortar) and filled with concrete. The units lock together somewhat like Lego bricks and create a form for the structural walls or floors of a building. ICF construction has become commonplace for both low rise commercial and high performance residential construction as more stringent energy efficiency and natural disaster resistant building codes are adopted.
Information (dielectric constant, loss tangent, temperature ratings, etc.) about all insulating materials of interest to EE's from resins to wire insulations to circuit board materials. Condition is very good, with no markings except for a name stamp on the flyleaf. The only condition issue is...