Category: Expansion

Carbonation of Conrete Eliminates Corrosion Passivation Effect of Cement Paste

by magroupllc, posted in Building Materials, Carbonation, chloride, Concrete, Corrosion, Expansion, Forensic Chemistry, Metals

Concrete and steel together form the backbone of every bridge, building, and road in a symbiotic relationship. The steel gives the concrete higher durability by increasing tensile strength, and the concrete provides physical and chemical barriers for the steel, protecting it from the elements. With exposure to air and water, the chemical properties of the … Continue reading Carbonation of Conrete Eliminates Corrosion Passivation Effect of Cement Paste

Why Does Sulfate in Concrete Matter?

by magroupllc, posted in Building Materials, Concrete, Corrosion, Expansion, Forensic Chemistry, sulfate, Uncategorized

Sulfate in concrete has connotations of being negative and causing durability issues. Issues with sulfate in concrete do emerge when there is too much sulfate present, but it is actually a necessary component in a concrete mixture. As part of a concrete mixture, sulfate reacts with calcium aluminate in the cement, to help control the … Continue reading Why Does Sulfate in Concrete Matter?

Potential Issues with Using Polyurethane Foam for Building Insulation

by magroupllc, posted in Building Materials, Coefficient of Thermal Expansion, EPS, Expansion, Foam, Forensic Chemistry, Hazards, Insulation, Polyurethane, Shrinkage, SPF, XPS

Polyurethane foam is extensively and increasingly being used as insulation and vapor barriers in homes and buildings. There are many different types of polyurethane foam which makes it a versatile material, having a range of practical building applications. Types of foam include open cell polyurethane, closed cell polyurethane, extruded polystyrene, expanded polystyrene, spray polyurethane foam, … Continue reading Potential Issues with Using Polyurethane Foam for Building Insulation