Natural Pozzolans - Past and Present

August 19, 2020
11:30 AM - 12:30 PM
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Presented By: Joseph Thomas
Executive Director, Natural Pozzolan Association

Presentation Learning Objectives

  • History of Natural Pozzolans
  • Natural Pozzolan Chemistry
  • Natural Pozzolan Durability
  • Current and Future Natural Pozzolan Production


About the Speaker

Mr. Thomas attended college on ROTC scholarship and majored in both Electrical Engineering and Political Science. He graduated in 1982 and was commissioned an officer in US Army. He had an additional 11 months of schooling while attending counter-intelligence and strategic-intelligence training in Sierra Vista, AZ and Williamsburg, VA. Joseph then worked for US Scientific Evaluation Team located near Tokyo Japan for 5+ years, serving as assistant director, and finally as director of the organization. Part of his assigned research was related to blast absorbing and blast resistant concrete, as well as highly densified concrete needed for various shielding applications. 

After leaving government service he worked as a consultant aligning US companies with Asian counterparts in a variety of fields related to his time spent on research in Asia. One of those companies, Hess Pumice/Idaho Minerals (perlite), offered him a management position, which he accepted.  He served as HP's VP-R&D for over 15 years, which included developing their marketing/sales footprint in Asia and Europe. Product development work included lightweight concrete construction products (stone veneer), ultra-lightweight low temp (Cryogenic) insulation products, Type IP cements, coatings products, blast absorbing encasements for the defense industry, cementitious oil field products, and of course - several natural pozzolan products.

After a decade and a half of corporate life, Joseph decided to strike out on his own as a consultant in the cementitious materials world. He owns and operates a cement/concrete R&D lab in Idaho in conjunction with the consulting business.  He has developed or co-developed additional lightweight cementitious products for oil field services companies, as well as guided the development of new natural pozzolan resources in North America, the Middle East, and the Far East.  He also developed patented methods and compositions for the remediation/beneficiation of non-spec fly ash.

He works with DOTs that want to be prepared for the potential shortages of artificial pozzolans - such as fly ash. He works closely with several civil engineering departments at key research universities in the preparation and testing of both natural pozzolans and beneficiated fly ashes, as well as specialized commercial labs which are certified for ASTM & AASHTO concrete, cement, and pozzolan performance testing.

Joseph has over 30 years of experience with cementitious materials, focusing on SCMs & Natural Pozzolans, blended cements, lightweight cements, ultrafine cementitious grouts, lightweight aggregates, and the remediation of non-spec waste products which have cementitious value. The majority of the commercial or soon to be commercial raw natural pozzolan products available in North America were developed under his guidance.” He currently serves as the Executive Director of the Natural Pozzolan Association – NPA.

Registration Fees

Members: $10
Non-Members: $20

Registration fee includes webinar and an optional certificate for 1.0 Professional Development Hour (PDH) which will be emailed upon request to attendees after the presentation concludes.

Deadline to register is Monday, August 17, 2020.


$10.00 Members

$20.00 Non-Members

$10.00 Additional Company Member