Type IL Cements: The Science and the Realities

An industry shift from ASTM C150 Type I/II cements to ASTM C595 Type IL cements is occurring nationally, driven largely by initiatives aimed at reducing the carbon footprint of reinforced concrete infrastructure. In some markets, Type IL cements are the predominant cement type available, while in other markets, ASTM C150 cements are still readily available. Type IL cements, also called portland limestone cements, consist of an ordinary portland cement (e.g., Type I cement) either blended or interground with a fine limestone powder up to 15 percent by weight. Several studies have been conducted over the past two decades comparing the performance of Type I/II cements to Type IL cements. These studies have shown that Type IL cements can be produced in such a way as to provide “equivalent” performance to Type I/II cements, however, more recent experience with Type IL cements in field applications has been more varied. This presentation will discuss the science behind Type IL cements and how they can perform similar to Type I/II cements in certain aspects and differently in other aspects. The impact of Type IL cement on the strength, durability, and plastic properties of concrete will be discussed. Considerations for specifying, producing, placing, and finishing Type IL cement concrete will be presented.

• Course will award 1.25 hour of continuing education
• Diamond Review approved in all 50 states
• This LIVE webinar will not be recorded for future playback or viewing.

Speaker:

Elizabeth I. Wagner, Ph.D., P.E., is a materials engineer with Wiss, Janney, Elstner Associates, Inc. Her experience and expertise include durability of concrete materials, service life analysis of reinforced concrete structures, and the development and testing of construction materials. Dr. Wagner has been involved in a variety of projects involving field, laboratory, and analytical investigations of reinforced concrete materials and structures, and conducted research on the performance of concrete mixtures produced using Type IL cements as part of her Ph.D. at the Georgia Institute of Technology. She is a member of ACI Committees 201 Durability, 207 Mass Concrete, and 236 Materials Science.

Jacob L. Borgerson, Ph.D., P.E., is a concrete consultant with Wiss, Janney, Elstner Associates, Inc. Dr. Borgerson specializes in providing concrete construction expertise in multiple areas including cracking, placement/finishing defects, low compressive strength, construction practices, mass concrete, ready-mix operations, specifications, field testing, and repair of existing structures. He is a member of the American Concrete Institute (ACI) and Structural Engineers Association of Texas (SEAoT). In addition, he serves on ACI Committees 207 Mass Concrete, 117 Tolerances for Concrete Construction, and 330 Parking Lots and Site Paving.

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