Sessions and Events

Sessions & Events 

GA = Grand America; LA = Little America

 

Convention Highlights

March 28, 2018


8:30 AM - 10:30 AM

Moderator: Barzin Mobasher

During the past two years ACI Committee 544 has developed five new documents addressing the testing and fresh concrete properties, mechanical properties, backcalculation of tensile properties, structural design with FRC, design of elevated slabs with FRC and design of precast tunnel lining with FRC. These published reports (ACI 544-6R, 7R, 8R, 9R, 3R) are currently available for the engineering community and offer a completely fresh way to use, design and implement fiber reinforced concrete in a variety of applications. The purpose of this half day session is to have two presentations for each document addressing the details of the document content, how they interact with each other, as well ways to implement, and incorporate the knowledge in these documents in the design and specification. The speakers will be primarily members of the committee who were the primary authors of the documents. The presentations will address: (1) New test methods for characterization and specification of early age and mechanical properties of fiber reinforced concrete. (2) New procedures for backcalcuation of tensile material properties and residual strength parameters based on standard flexural tests conducted to fiber reinforced concrete. Use of material parameters in the design of flexural components such as beams and slabs on ground will be addressed. (3) Development of analysis and design procedures for use of fiber reinforced concrete in elevated slabs. (4) Development , analysis, design, manufacturing, and applications of tunnel lining segments with fiber reinforced concrete.


8:30 AM - 10:30 AM

Bridge decks, bridge girders or bridge steel tubes filled with ultra-high-performance concrete UHPC were one of the first large scale applications of UHPC and led to many fascinating bridge designs using precast / prestressed or cast-in-place concrete technology. Since then innovations in bridge design has further advanced using UHPC as shear connector, repair material or as ductile and impact absorbent material in parts of bridge columns. UHPC is seen as one of the breakthroughs in the construction industry of the 21st century due to its excellent mechanical performance and its enhanced durability properties in comparison to conventional concrete. In general, UHPC is being used to increase the load carrying capacity and to enhance the durability performance of newly designed bridges as well as aging and deteriorating bridges. The session will invite national and international experts in the field of bridge design to share their knowledge and experiences.


8:30 AM - 10:30 AM

ACI Committee 233 on Slag Cement would like to sponsor a 2-hour session at the Spring 2018 Convention/Meeting. The session theme is "Using Slag Cement to Elevate Concrete Performance". There will be two co-session moderators (Mark Luther (LafargeHolcim) and Jay Whitt (ESSROC)). There will be three 20-minute speaker presentations on single topics each. The three presenters will be Gary Knight & Godron Mclellan (Lehigh), David Imse (Skyway), and Mark Luther & Henry Prenger (LafargeHolcim). This segment will be followed by a 60-minute Slag Cement Awards presentations about each of the award categories. The SCA awards presentations will feature individual presentations of each project receiving an award and this segment of the session will be hosted by Drew Burns, of the SCA. Those who should attend: Engineers, architects, owners, specifiers, materials suppliers, contractors, academics, students. Learning outcomes: (1) Slag Cement is used in a broad array of structures, and to performance advantage. (2) The cementitious material is used in prominent structures with confidence and high performance reliability. (3) The higher spectrum of dosage and applications is visited, (4) and the audience will see how even very high doses of the material can be used to good effect, and can expand the window of opportunities for performance in structures.


11:00 AM - 1:00 PM

Moderator: Paul E Gaudette

Concrete repair session to honor the contributions of Tony Murray (passed in 2016) to ACI and the concrete repair community. Tony was Chair of ACI 546, ACI 503, ACI 563, member of CLC, TAC, 364, 503, 546, 562, 563, TRRC. Tony was a Fellow of ACI and speaker over many years with ACI Concrete Repair Seminars. Tony was an engineer, materials expert, and owned a structural concrete repair construction company. The session will include speakers from the concrete repair and materials community and the topics that reflect Tony's wide range of knowledge in concrete repair and materials.


11:00 AM - 1:00 PM

Bridge decks, bridge girders or bridge steel tubes filled with ultra-high-performance concrete UHPC were one of the first large scale applications of UHPC and led to many fascinating bridge designs using precast / prestressed or cast-in-place concrete technology. Since then innovations in bridge design has further advanced using UHPC as shear connector, repair material or as ductile and impact absorbent material in parts of bridge columns. UHPC is seen as one of the breakthroughs in the construction industry of the 21st century due to its excellent mechanical performance and its enhanced durability properties in comparison to conventional concrete. In general, UHPC is being used to increase the load carrying capacity and to enhance the durability performance of newly designed bridges as well as aging and deteriorating bridges. The session will invite national and international experts in the field of bridge design to share their knowledge and experiences.


1:30 PM - 3:30 PM

Moderator: David A Rothstein

This session will present the latest in research and practical experience on understanding the links between the use of deicer salts and the deterioration of concrete pavements and flatwork. This session will focus on chloride-based deicers and will be of interest to owners, designers, contractors, suppliers and researchers. Learning Objectives: (1) Hear the latest thinking on the mechanisms that cause premature joint deterioration and how to minimize the risks of such deterioration. (2) Learn how aggressive agents infiltrate concrete and cause deterioration during freezing. (3) Discover details about the formation of oxychlorides and how they affect key engineering properties such as flexural strength. (4) Learn how information from simple quality control tests can be used to model the performance of joints exposed to deicers in freeze-thaw conditions.


1:30 PM - 3:30 PM

It was interesting to see the different ways that the different offices are doing design using our codes with results of FEM (Finite Element Method) analyses. The issue here is that the FEM provide eight internal forces (3 membrane, 3 out-of-plane and 2 shears) that we have to design for. And unlike steel where you can convert all these degrees of freedom into Von Mises and check against one allowable. Concrete does not lend itself to the use of Von Mises, not without a whole lot of manipulation of data. This is further compounded by the fact that our codes are really set up for component/member design not element design. So in the past we have had to set up elaborate strips in the FEMs that aggregate the results of several elements together into cross sectional forces that we can then check against code allowables. This too is very data intensive and has its own challenges. The aim of the Sessions is to have presentations of best practices of Element Based Designs from across the industry with expert advice on what works and what does not. And if we do this right, ACI 349 hopes to publish proceedings that give concrete guidelines on how the ACI codes should be applied for element based design.


1:30 PM - 3:30 PM

Moderator: Paul E Gaudette

Concrete repair session to honor the contributions of Tony Murray (passed in 2016) to ACI and the concrete repair community. Tony was Chair of ACI 546, ACI 503, ACI 563, member of CLC, TAC, 364, 503, 546, 562, 563, TRRC. Tony was a Fellow of ACI and speaker over many years with ACI Concrete Repair Seminars. Tony was an engineer, materials expert, and owned a structural concrete repair construction company. The session will include speakers from the concrete repair and materials community and the topics that reflect Tony's wide range of knowledge in concrete repair and materials.


6:30 PM - 8:00 PM

ACI President Khaled Awad invites all convention attendees to the President's Reception, where you'll have the opportunity to network with committee Chairs, chapter Presidents, and international attendees. An assortment of food and beverages will be available.