A History of Expertise and Innovation
RJ Lee Group has assessed environmental issues since the early 1980s when our Energy Technology Consultants (ETC) pioneered the recognition of specific air quality patterns. We developed a cutting-edge technique for identifying, measuring, and characterizing particles in the air using computer-controlled scanning electron microscopy (CCSEM).
RJ Lee Group has worked with clients in various industries, including the U.S. Environmental Protection Agency (EPA), to assess and provide solutions for environmental factors that could affect our health. Our services have grown over the years, from setting controls for unbound nanoparticles (UNP) to designing and building test chambers to simulate specific environmental conditions.
Today we offer our expertise for our clients’ environmental and compliance concerns and perform rigorous assessment and management of potential environmental risks.
CONSULTING AREAS
Integrated Laboratory Expertise in Cementitious Materials
RJ Lee Group brings decades of experience in analyzing concrete and construction materials. Our expertise spans both microscopic and chemical characterization, enabling us to diagnose deterioration, evaluate performance, and support complex decision-making across design, repair, and litigation.
Concrete Strength and Durability
Concrete strength is essential, but it's not the only factor.
Durability matters to maintain properties over time. Issues can manifest years after construction. Laboratory investigations and detailed concrete analysis are vital to determine root causes and mechanisms, helping engineers design repairs and estimate service life.
- Petrographic Analysis: Expertise in identifying deterioration mechanisms (e.g., ASR, DEF, freeze-thaw damage,) using ASTM C856 and C295. Our petrographers interpret material microstructure, hydration states, and aggregate behavior with precision.
- Microstructural & Chemical Characterization: Deep proficiency in SEM/EDS, XRD, XRF, and other techniques to evaluate cement paste composition, detect deleterious compounds, and estimate water-cement ratios. Our work informs materials selection, performance modeling, and failure anaylsis.
- Durability and Surface Condition Assessment: Expertise in evaluating air void systems (ASTM C457), surface scaling, chloride ingress, carbonation, and fire exposure. Our analyses guide repair strategies and durability forecasting.


Applied Engineering Expertise
Partnering with Durability Engineers to Extend Our Insight
We work closely with Durability Engineers, LLC, to bridge the gap between laboratory findings and real-world engineering decisions. Together, we offer:
- Condition assessments for aging infrastructure.
- Materials performance evaluation and risk forecasting
- Specification support and mix design review
- Expert witness and litigation consulting

Technical Leadership Across a Range of Projects
Our team is routinely called upon to support high-stakes evaluations involving:
- Bridge and transportation infrastructure durability
- Concrete damage assessments for legal claims
- Historic preservation of masonry and cement-based materials
- Swimming pools, industrial slabs, and public sidewalks
- Investigations into poor performance, unexpected deterioration, or construction issues

Why Our Expertise Matters
Bringing Scientific Rigor to Concrete Performance
- Decades of combined experience in concrete petrography and material science
- Advanced instrumentation to characterize materials at the micro- and nano-scales
- Proven collaboration with engineers, contractors, and legal teams
- Clear reporting, actionable insights, and defensible conclusions

Expert Spotlight
Michael Baker
Construction Materials Laboratory Manager
Michael Baker serves as the Department Manager of the Concrete Materials Laboratory and has nearly a decade of experience in concrete petrographic studies at RJ Lee Group. In addition to managing the concrete materials laboratory operations, he directs and conducts petrographic evaluations, in combination with chemical and physical testing, to identify failure and distress mechanisms in concrete and cementitious materials.

Case study
How AeroTech Secured Its Future
When AeroTech Industries faced recurring defects in a crucial aircraft component, they were at risk of losing multi-million dollar contracts and jeopardizing the jobs of hundreds of employees. They enlisted the help of RJ Lee Group, who quickly deployed a team of technical experts. Through state-of-the-art forensic analysis, RJ Lee Group identified and rectified the root cause—a flaw in the casting process—eliminating the defect and preserving AeroTech's contracts.
Discuss Your Construction Consulting Needs with an Expert
Choose RJ Lee Group's Construction Materials Group for your concrete expertise needs. We are committed to strengthening and ensuring the durability of your structures.