Dictionary SubstancesChemical CompoundLightweight Insulating Concrete Lightweight Insulating Concrete (LWIC) Last updated: January 28, 2020 What Does Lightweight Insulating Concrete (LWIC) Mean? Lightweight insulating concrete (LWIC) is a combination of regular Portland cement and perforated or cellular foam with circular cutouts. The mixture may also be expanded with aggregate, such as vermiculite or perlite. A complete LWIC system typically consists of two or more inches of lightweight concrete cast onto a corrugated steel deck. It is used primarily for providing insulation. Advertisement Corrosionpedia Explains Lightweight Insulating Concrete (LWIC) Lightweight insulating concrete, as its name suggests, is a type of lightweight material. The design consists of molded expanded polystyrene foam (MEPS) embedded in a concrete mixture (typically referred to as a slurry). A steel deck substrate is provided as the final layer to stabilize the hardened mix. Unlike reinforced concrete, LWIC is non-structural, i.e., it is not used to carry significant loads or provide structural stability. This material is primarily used in roofing systems, where it acts as a roofing base, providing thermal resistance to industrial and commercial buildings with low-sloped roofs. Related Question Should I use a polyurethane or epoxy coating on concrete? Advertisement Share This Term> Related Terms Insulating Barrier Thermal Insulation Thermal Conductivity Concrete Substrate Concrete Coating Spray Polyurethane Foam Vermiculite Perlite Portland Cement Related Reading The Effects of Corrosion on the Shear Behavior of Materials The Root Causes of Today’s Multifactorial Concrete Problems Concrete Flooring Moisture Issues Is Surface Preparation for Concrete Repairs a Fad? Correcting and Preventing Concrete Corrosion Why Concrete Delamination Occurs – and What to Do About It Tags Corrosion Substrates Infrastructure Concrete Substances Substances Industries Chemical Compound Trending Articles Corrosion An Introduction to the Galvanic Series: Galvanic Compatibility and Corrosion Chemical Compound 5 Most Common Types of Metal Coatings that Everyone Should Know About Asset Management Understanding Aluminum Corrosion Asset Management If Copper is a Noble Metal then Why Are My Pipes Corroding?