Construction Materials
RJ Lee Group specializes in the evaluation and testing of construction materials and in concrete durability modeling for predicting service life.
Quality and durability ensure longevity.
Michael R. Silsbee, Ph.D. Industry Contact
We anticipate and minimize potential issues that may result in additional cost to our clients. Using standardized testing, we ensure that primary materials meet established criteria; we provide assurance to our clients, and protect their interests.
Using STADIUM® software, we can model and predict service life for new and existing concrete structures such as parking garages, bridges, and piers that are exposed to aggressive contaminants like seawater, deicing salts, and chloride- or sulfate-rich environments.
The Right Stuff
The integrity of a structure is only as good as the quality and durability of the raw materials that go into it. These raw materials must be evaluated according to specification to ensure quality and durability. However, when early degradation or deterioration occurs or the service life is compromised, our experts can conduct studies that include site inspection to determine the cause.
Our services include:
- Petrographic examination of concrete
- Air content
- Water-to-cement ratio
- Identification of deterioration mechanisms such as Delayed Ettringite Formation (DEF), sulfate attack, freeze/thaw damage, alkali-silica reaction (ASR),
- Chemical analysis for sulfates, chloride and metals.
- Porosity and Permeability Testing
- Strength Testing
- Evaluations of steel used in concrete
- Qualification of concrete mix design
- Characterization of supplementary materials including fly-ash
- Analysis of samples to determine input data for service life durability modeling.
RJ Lee Group experts have the in-depth, scientific knowledge to assist in formulating for longevity and durability and/or to determine the cause of failure.
