Although many practicing engineers have access to finite element software that can perform heat transfer and stress analyses, this software often doesn’t include modules for evaluating diffusion problems. This can make it difficult to analyze a concrete structure or component for the effects of moisture loss over time. The technique described in this article takes advantage of the analogy between diffusion and heat transfer equations to allow commonly available software to analyze concrete structures for stresses arising from restrained drying shrinkage.

Delaminations in concrete floor slabs can be difficult to repair in a cost-effective and timely manner. A newly developed product that uses a two-part hybrid polyurethane with a viscosity similar to water can significantly reduce the difficulty of performing delamination repairs by easily flowing up to 10 ft (3 m) from an injection point and penetrating deep into concrete surfaces. The product also speeds up repair by setting in only 10 minutes, allowing the repair to be checked by sounding only 30 minutes after product placement.