President, Petrographer, Materials Scientist, Professional Geologist
For more than two decades, Dipayan Jana, the founder and CEO of CMC has been actively involved in characterization, testing, evaluation, and forensic investigation of a wide range of materials, including their short and long-term performance. Dipayan has worked on more than three-thousand projects on quality assurance, characterization, and forensic investigations of various kinds of geological, building, and construction materials e.g., terrestrial and extra-terrestrial rocks, minerals, gemstones, ceramics, building stones, lime, gypsum, hydraulic cements, natural and manufactured aggregates, concretes, and masonries from modern to historic structures. Dipayan has an extensive list of publications on applications of petrography and associated techniques in a wide variety of geological and construction materials that can be viewed under the 'publications' page.
American Society for Testing and Materials (ASTM)
American Concrete Institute (ACI)
American Society of Civil Engineers (ASCE)
International Concrete Repair Institute (ICRI)
American Ceramic Society (ACE)
Society of Concrete Petrographers (SCP)
Geological Society of America (GSA)
Geochemical Society of America
Mineralogical Society of America (MSA)
American Geophysical Union (AGU)
Professional Geologist, Washington & Texas.
In the position of Office Manager for almost two decades, Jennifer has been the nucleus of CMC's day-to-day operations. She is not only responsible for keeping track of clients’ needs, but also handles inventory tracking, maintenance of office equipment and computers, preparation of cost proposal and project entry in database, data compilations for Dipayan’s professional reports, and sample disposal/return arrangements after projects. As a right hand of Dipayan, Jennifer leaves him to do what he likes to do the most – spend time in his labs doing testing, examinations, report preparations, and consultations with clients.
Quite possibly the world's best thin section maker who has been meticulously preparing thin sections of anything and everything for almost two decades! Mr. Brown has a Bachelor of Science degree in Earth Science and Geography with concentrations in Geology, Cartography, and Mathematics. Jeff is involved in extensive sample preparation for CMC and its sister-company, Applied Petrographic Services, Inc. (, APS). From regular day-to-day operations of sectioning, grinding, polishing, thin sectioning, and other sample preparation methods Jeff is also engaged in the research and development of innovative sample preparation fixtures and techniques for automated precision sectioning and grinding of multiple samples for the bulk production of quality thin sections for the customers of APS.
LATE DR. BRYANT MATHER
U.S. Army Corps. Of Engineers
Comment on Dipayan’s article “Delamination – A state-of-the-art review." Click on the following comment to read handwritten 4-page comments of this 'concrete giant' in 2002, at the age of 92, the same year that Bryant passed away.
LATE DR. RICHARD C. MIENELZ
Materials and Petrography
Comment on Dipayan’s article “Troubleshooting Concrete Problems Through Microscopy” 1997
“It is very well written, yet succinct, and provides a good perspective of the application of microscopy in the concrete industry. I am left with little upon which to comment as a basis for improvement.”
DONALD H. CAMPBELL
Principal Petrographer at Campbell Petrographics, one of the world’s leading authorities on cement and concrete microscopy, and author of the well-known book “Microscopical Examinations and Interpretation of Portland Cement and Clinker.”
“Dipayan Jana is undoubtedly one of the best petrographers around. One of his strongest talents is utilizing the blend of light- and electron-microscopy in diagnosing concrete and mortar failures. Furthermore, he can write quite well, having made many excellent contributions to our professional journals. I highly recommend Dipayan.”
MICHAEL P. EDISON
President, Edison Coatings, Inc. Plainville, Connecticut
“CMC employs an impressive array of technological tools to provide comprehensive analyses for historic masonry mortars. They also deliver results on a reliable schedule to meet the time pressure of our clients’ projects.”
JAMES W. ANDERSON, PE
Principal/Structural Division Manager, Woodstock, Maryland
"I have utilized Dr. Jana’s and CMC’s services exclusively for over seventeen years. I find their reports to be thorough, conclusive and always delivered in a timely fashion (usually sooner than promised)."
Sr. Architectural Conservator, Arlington, Virginia
"CMC, Inc. is an excellent resource for petrographic analysis of historic mortars. Mortar analysis for historic buildings must go beyond just understanding the components of the mortar to understanding how those components are contributing to the success or failure of that mortar over time. This is where CMC, Inc. succeeds in guiding architects towards the right restoration mortar mix. The reports are thorough yet concise with reliable turn-around times. Dr. Jana is always willing to discuss the findings and his clients can count on his expertise."
DENNIS WIPF P.E.
Structural Engineer, Phoenix, Arizona
"I have worked with CMC for well over 10 years with petrographic analysis. They have consistently dug deeper, using SEM or other methodology to better understand the real cause of the problem. Their reports and photographs are excellent, and they explain what their findings mean, not just what they saw."