Modeling of Concrete Structures over Service-Life and Testing of Construction Materials

RJ Lee Group is a specialist in the testing, evaluation and failure analysis of construction materials and in service-life modeling of concrete structures utilizing STADIUM software.

Industrial Forensics Approach

RJ Lee Group is one-of-its-kind full-service laboratory and has experienced consulting scientists in physical, chemical and petrographic testing to scientifically analyze the root cause of structural failure, deterioration, or degraded performance. Typical materials analyzed by the company include packaged repair products, aggregates, pool plaster, terracotta, tiles, bricks, mortar and concrete.

Petrography and More

RJ Lee Group’s petrographic experts will help customers to analyze their cementitious materials and characterize new and historic construction materials. For over three decades, the company has carried out several innovations and improvements in microscopy. It uses standard ASTM, CSA, BS EN, DOT, FHWA, AASHTO and other techniques, when appropriate.

The company often goes above and beyond standard procedures for delivering the best possible resolution. For instance, it performs ASTM C1324 mortar analysis and C856 petrographic analysis of hardened concrete utilizing both optical and modern scanning electron microscopy methods to rapidly determine the root cause of failure.

Besides determining the most common causes of concrete failures including freeze-thaw damage, chloride intrusion, external sulfate attack, delayed ettringite formation and alkali aggregate reactions, the company is also capable of identifying the as-built concrete mix design, supplementary cementitious materials (particularly those with distinctive or unusual additives), as well as the actual construction practices.

Additional Services and Techniques

RJ Lee Group also provides several additional services and techniques. The company chemically analyzes construction materials for metals, organic contaminants, and chlorides and investigates architectural paints, membranes and coatings. It also conducts porosity and chloride permeability tests (ASTM C1202), potential alkali reactivity of aggregate (ASTM C1260 and C1567), and in- house physical tests for freeze thaw durability (ASTM C666), often using STADIUM service life modeling software. It may seek advice from an extensive external network of experts to get additional data for those services that cannot be provided in house.

Engineering Support

RJ Lee Group’s industrial forensics approach is a combination of its knowledge in corrosion and concrete to help engineering firms in performing structural condition analyses of reinforced concrete structures as well as in assessing historical construction for adaptive reuse. The company is one of a very few laboratories certified to conduct laboratory testing using STADIUM modeling software and to perform STADIUM service life simulations.

The integrity of new construction relies on the quality and durability of the raw materials used. RJ Lee Group’s experts will work with customers throughout the entire construction process. Besides performing analyses of problems that take place during the construction process, the company is capable of assessing and qualifying raw materials (aggregate, GGBFS, fly ash, and cement, etc.) used by the customers and providing quality assurance all over the lifetime of a customer’s product.

About RJ Lee Group

For nearly 30 years, RJ Lee Group, Inc. has excelled at providing analytical services, technical consulting, information management, and expert testimony in materials characterization and forensic engineering. Our services are sought by leading organizations in academia, industry, and government. Clients choose RJLG because of our reputation as an innovative solutions firm that is reliable, ethical, and committed to quality. The end result is outstanding customer satisfaction.

RJ Lee Group applies the most appropriate and efficient testing methods to deliver scientific resolution for a wide range of industries.Using state-of-the-art analytics, our multidisciplinary staff addresses diverse needs — including regulatory compliance, quality control, materials R&D, industrial hygiene and environmental health and safety.

  • Construction Materials
  • Criminal Forensics
  • Energy & Utilities
  • Engineering
  • Government
  • Hospitals
  • Legal
  • Medical Device
  • Metals & Alloys
  • Microelectronics
  • Mining & Minerals
  • Pharmaceutical
  • Specialty Chemicals & Coatings

RJ Lee Group defines our expertise as the capabilities of those who day in and day out verify the established, expose the concealed, investigate the problem, provide the solution and confront the unknown.

  • Research & Development
  • Field Surveys, Evaluations & Sampling
  • Materials Characterization
  • Post-Disaster Assessments
  • Particle Characterization
  • Corrosion Analysis
  • Materials Selection
  • Failure Analysis
  • Nano-Characterization
  • Data Analytics
  • Related RJ Lee Group Inc. (RJLG) News
  • Raman Technology Added By RJ Lee Group Laboratory

This information has been sourced, reviewed and adapted from materials provided by RJ Lee Group.

For more information on this source, please visit RJ Lee Group.


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