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
Tag: material failure investigation
Why Does Sulfate in Concrete Matter?
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
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
How the pH of Concrete is Related to Corrosion Protection
In concrete, steel is often embedded to reinforce the concrete, providing tensile and flexural strength. This combination of steel and concrete allows for some of the most durable and beautiful structures to be built. Concrete, as a building material, has superior compressive strength to most materials, and is durable in many different exposure environments. However, … Continue reading How the pH of Concrete is Related to Corrosion Protection
Case Study: Staining of Exterior Marble Tile Caused by Cold Applied Asphaltic Waterproofing Membrane: Solved by FTIR Analysis
In 2013, marble tiles were installed as pedestrian pavers on the exterior plaza of a new condominium built near the Atlantic coast in Florida. After three years of being in service, the marble tiles started exhibiting orangish brown surface staining that had a similar appearance to iron oxide staining. Replacement of the marble tiles would … Continue reading Case Study: Staining of Exterior Marble Tile Caused by Cold Applied Asphaltic Waterproofing Membrane: Solved by FTIR Analysis