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
Tag: failure investigation
Why does chloride in concrete matter? What’s the difference between water-soluble chloride and acid-soluble chloride?
One of the most common chemical analyses performed on concrete is chloride analysis. Grouts, mortars, soils, and water samples are also often tested for chloride. Chloride is a negatively charged ion that has the ability to react with the iron in steel reinforcing, causing corrosion. This can lead to cracking of concrete due to the … Continue reading Why does chloride in concrete matter? What’s the difference between water-soluble chloride and acid-soluble chloride?
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
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