December 14th 2021 Webinar

Tuesday, December 14, 2021 Webinar:

“ACI Concrete Durability Requirements

Presented by Colin Lobo, P.E.

Executive Vice President, Engineering Division

National Ready Mixed Concrete Association


Henry Prenger, P.E.

Technical Service Engineer

Lafarge Holcim Cement

Receive (1.0) PDH

12Noon - 1PM EST


Presentation Topic:

ACI 318-19, Building Code Requirements for Structural Concrete address durability requirements for concrete that are covered in specification format in ACI 301-20, Specifications for Concrete Construction. ACI exposure categories define exposure classes that establish requirements for concrete mixtures. These include requirements for resistance to freezing and thawing, sulfates, corrosion of reinforcement, and alkali silica reactions for concrete in contact with moisture. Similar durability requirements are included in Sec 033000 of the AIA MasterSpec. Colin and Henry will discuss these requirements from the viewpoint of the Structural Engineer.

Speaker Biographies:

Colin Lobo, Ph.D., P.E. is the executive vice president of the Engineering Division at the National Ready Mixed Concrete Association. He manages the association’s technical advocacy, research activities, and technical education and certification programs. Colin is an active member of ACI 318 for the Building Code for Structural Concrete, ACI 301 on Specifications, and other committees.

Henry Prenger, P.E. is the former Concrete Engineer for the Maryland State Highway Administration, has worked nationally as the Director of Technical Services for Lafarge Cement, and is currently a Technical Service Engineer for Lafarge Holcim Cement. He is the current chair of ACI 301 (Specifications) subcommittee on materials, the chair of ACI 233 (Slag Cement), and a member of ACI 207 (Mass Concrete). Prenger is a Fellow of ACI, an Honorary Member of ASTM, and a registered professional engineer in the state of Maryland