First-time Convention attendees are invited to join ACI Vice President, David Lange for a continental breakfast and brief session to orient you to the week ahead. Attendees will have the opportunity to meet other first-time convention attendees, connect with convention mentors, and learn about what The ACI Concrete Convention and Exposition has to offer.
Moderators: Khatereh Vaghefi, Nestor R Rubiano
Presentations will include review rating methods for defining performance of existing concrete bridges. This session will be of interest to bridge owners, operators, design engineers and researchers.
(1) Summarize methodologies for rating existing concrete bridge components including bridge deck, superstructure and substructure, using both LRFR and LFR approaches.
(2) Review case studies of load rating concrete bridges with various structural configurations such as typical prestressed I-girders, reinforced and prestressed multi-cell box girder bridges, segmental concrete bridges, bridges with large horizontal curvatures and complex geometry (e.g. concrete arch and rigid frame bridges), and bridges with insufficient plans or details.
(3) Explain relevant refined analysis methods that extend beyond traditional AASHTO rating methods.
(4) Identify finite element modeling, grillage modeling and diagnostic load testing.
Moderator: Walter H Flood IV
Students will eagerly form and construct fiber-reinforced bowling balls, hoping that they don’t strike out in competition against their peers. All will enjoy seeing the students knock down pins with their concrete bowling balls, prior to loading their balls within an inch of failure. Successful student teams will learn about advanced casting processes to produce a round concrete ball, the working properties of fiber-reinforced concrete, and the art of picking up a 7-10 split, performing under extreme pressure, working as part of a team, and the benefits of fiber reinforcing. Attendees are encouraged to stop by the competition to see these teams compete against one another as they strike and crush their bowling balls to within an inch of its strength. This competition is sponsored by S801 Student Activities and 544-A FRC-Education Production Application.
The ACI International Forum provides an opportunity for convention attendees to meet and learn from ACI international partners, chapter representatives, and ACI leadership about worldwide events, activities, initiatives, and common themes of interest to the concrete materials, design, and construction industry.
Featured speaker, Professor Koichi Maekawa will give a presentation on “Road to New Transport Infrastructure—Super Express Maglev and Extended Airport.” This presentation will provide an overview of the Maglev super-express train and ocean-extended Tokyo International Airport as national challenges to a new transport infrastructure. An overview of maglev linear-Shinkansen construction of approximately $30 billion is presented to meet the increasing traffic demand and business, and the new conceptual design for concrete structures and new performance requirements for materials will be reported. Another recent achievement to meet the challenge of inbound transport is the extended Tokyo Haneda International Airport. It is truly one monolithic non-jointed reinforced concrete deck of 0.6 km² and has become the world’s first non-crack runway structure built above the ocean. The lifetime performance-based design/contract and the new construction system with super-quality concrete are the technical highlight, and the crack control and the fatigue damage assessment are underlined. The social efficiency of these transport infrastructures will be thought about together with the engineering interest. PREREGISTRATION IS REQUIRED TO ATTEND. Tickets may be purchased at the ACI Registration Desk up to 24 hours prior to the event, based on availability. Please notify the ACI Registration Desk if you have any dietary restrictions.
International Lunch Flyer
Moderators: Dimitri Feys, Celik Ozydilirim
Self-consolidating concrete (SCC) is known to be more sensitive to changes in constituent elements, mixture design, and mixing procedure, which can have significant consequences on placement. Especially controlling the water content, including the moisture content of the sand, is a challenge, limiting the practical implementation of SCC. This session will reveal different strategies to control the variation in fresh properties, making the session suitable to material producers, contractors, engineers, owners, and academics. By attending this session, participants will be informed on: variations in concrete constituents, mixture design, mixing, transportation, and placement procedures influencing fresh SCC properties; which countermeasures can be taken to control these variations; the importance of an adequate quality control system for the successful implementation of SCC; and future perspectives in actively controlling fresh SCC properties.
(1) Recognize variations in concrete constituents, mix design, and mixing, transportation and placement procedures influencing fresh SCC properties.
(2) Explain which countermeasures can be taken to control these variations.
(3) Describe the importance of an adequate quality control system for the successful implementation of SCC.
(4) Discuss future perspectives in actively controlling fresh SCC properties.
Moderators: Farshad Rajabipour, Robert E Neal
Not all pozzolans are similarly effective against alkali-silica reaction (ASR). It is of utmost practical importance to determine the required dosage of a pozzolan to mitigate ASR in concrete containing given reactive aggregates. Although standard tests and procedures are available for this purpose, reliable and practical options to evaluate high-alkali pozzolans (for example, fly ashes, and natural- and glass-pozzolans with Na2Oeq > 4.0%) are limited. This session compares the results, benefits, and limitations of available methods with the goal of identifying best practices to evaluate the ASR mitigation of high-alkali pozzolans. The session will be especially valuable to owners, engineers, and material suppliers.
Learning Objectives: (1) Learn about available procedures and test methods for determining the required dosage of pozzolans to mitigate ASR in concrete containing reactive aggregates.
(2) Understand the benefits, limitations, and reliability of each existing method.
(3) Learn about new methods which may be better suited for determining the pozzolan requirement of job mixtures.
(4) Be able to discuss problems associated with high-alkali pozzolans and how they can be safely used to produce ASR-resistant concrete.
Moderator: Denis Mitchell
This symposium honoring Michael P. Collins titled “Shear in Structural Concrete” will discuss various aspects of shear design and evaluation of structures. The objective is to make ACI members aware of important behavioral aspects of structural concrete members subjected to shear. This symposium would appeal to structural designers, researchers, and students studying concrete design. This is a hot topic due to the tremendous interest already shown in discussions at the ACI Committee 445 meetings and the need to consider modifications to the ACI code. By attending this session, participants will be informed on: (1) the size effect in shear for both structural concrete and reinforced masonry; (2) developments of the Modified Compression Field Theory; (3) aspects of shear strengthening using FRP strips and (4) key aspects in the design of concrete offshore structures.
Moderator: William M Hale
This session highlights the successful use of high-strength concrete (HSC). The session also includes a historical overview of HSC, information on developing HSC mixture proportions, and best practices on testing HSC. Learning Objectives:
(1) Identify key factors in developing high-strength concrete mixture proportions.
(2) Determine factors that affect testing of high-strength concrete.
(3) Examine successful uses of high-strength concrete.
(4) Provide a historical overview of the development of high-strength concrete.
Moderators: Paramita Mondal, Nathan A Tregger
The interaction between chemical admixtures and components of concrete such as cement, supplementary cementitious materials, and pore solution has significant effect on the effectiveness of chemical admixture in controlling performance including rheology, setting, and microstructure development. The session will discuss possible compatibility issues between chemical admixtures and other components of concrete highlighting the physical and chemical phenomena affecting the adsorption of chemical admixtures on binder materials, stability of chemical admixtures in pore solution, interference with cement hydration and the resulting effects on fresh and hardened properties of cement paste, mortar, and concrete. The session should be of interest to researchers, concrete engineers, material suppliers, and students.
(1) Discuss possible compatibility issues between chemical admixtures and other components of concrete highlighting the physical and chemical phenomena affecting the adsorption of chemical admixtures on binder materials. (2) Recognize stability of chemical admixtures in pore solution.
(3) Identify interference with cement hydration. (4) Report the resulting effects on fresh and hardened properties of cement paste, mortar, and concrete.
Bridges are essential components of transportation systems. The failure and damage of bridges not only affects its immediate users, but also brings serious aftermath to earthquake events. With the increase in transportation demand and more stringent seismic performance requirements, bridge retrofit and repair is an important task for engineers and researchers. Bridge retrofits usually involve functional upgrades (such as deck widening) and seismic upgrades (such as strengthening seismic load path). The effects of the two upgrades are usually coupled and need to be analyzed. Many of the existing bridges do not meet the requirements in current design codes and thus cannot be analyzed using standard methods. Therefore, more sophisticated analysis and customized solution is needed. While providing structural upgrade solutions to seismic issues, engineers also need to reduce the interruption to the traffic as much as possible. Development and implementation of innovative retrofit and repair methods are expected to upgrade deficient bridges to current standards and minimize traffic interruption. The main objective of this session is to present results from recent research studies (experimental/numerical/analytical) and practical examples of existing bridge retrofit and repair. This session will provide a forum for practicing engineers and researchers to share and discuss the various issues related to design and construction issues of existing bridges. Learning Objectives:
(1) Understand the factors influencing the selection of various retrofitting options for deficient concrete bridge columns.
(2) Learn about seismic fragility assessment of various retrofitting techniques for concrete bridge columns.
(3) Learn about new developments in the repair and retrofit of concrete bridges.
(4) Learn about retrofit and rehabilitation of historic concrete bridges.
Moderators: Abdeldjelil Belarbi, Denis Mitchell
This symposium honoring Michael P. Collins titled “Shear in Structural Concrete” will discuss various aspects of shear design and evaluation of structures. The objective is to make ACI members aware of important behavioral aspects of structural concrete members subjected to shear. This symposium would appeal to structural designers, researchers, and students studying concrete design. This is a hot topic due to the tremendous interest already shown in discussions at the ACI Committee 445 meetings and the need to consider modifications to the ACI code.
(1) Recognize the size effect in shear for both structural concrete and reinforced masonry.
(2) Identify developments of the Modified Compression Field Theory.
(3) Explain aspects of shear strengthening using FRP strips.
(4) Summarize key aspects in the design of concrete offshore structures.
Moderator: Kanette S Worlds
The ACI Student Forum provides an opportunity for student chapters and competition teams to exchange ideas and best practices. Student speakers will deliver presentations about the activities and achievements of their student chapter or competition team. A limited number of presentations spots are available. Speakers may present as a group or an individual.
The Opening Session is the official start to the ACI Convention and will begin with a welcome address by ACI President Khaled Awad. Next, the emcee for the night, George Seegebrecht, will recognize new Honorary Members, Fellows, and 50-year Members for their contributions to the concrete industry. Then our featured keynote speaker Nick Tasler will give a presentation on the science of decision making. Tasler is an internationally acclaimed thought leader, organizational psychologist, and the No. 1 best-selling author of four counter-intuitive books on the art and science of making decisions and leading change. This is an Opening Session you don’t want to miss!
Immediately following the Opening Session and Keynote Presentation, attendees are invited to the exhibit hall for this evening reception. Congratulate Awardees, reunite with colleagues, network with new acquaintances, and learn about the products and services offered by the exhibitors. A cash bar and light refreshments will be available.
Moderators: Terri Taylor, Todd S Laker
The Utah Department of Transportation (UDOT) has championed and widely implemented ABC, and the use of ABC is now common practice throughout the State of Utah. In the past, construction strategies had largely been evaluated based on the costs of materials and labor. However, Utah’s highway users no longer prefer lowest-cost construction strategies, and therefore the way in which projects were evaluated and selected had to change to respond to their needs. Since Utah’s highway users highly value their time, and since user costs are real costs incurred by the public, project cost evaluations must also consider the time of the highway users. The ABC Program met these needs. Its overall philosophy is driven by the public’s demand to reduce congestion and increase safety. Its specific goals are to minimize traffic disruption, reduce on-site construction time, improve work zone safety and improve quality.
(1) Discuss how ABC minimizes traffic disruption.
(2) Summarize how the Utah DOT implemented ABC into their projects.
(3) Recognize the challenges of accelerated bridge construction (ABC).
(4) Identify the specific goals of the Utah DOT ABC program.
The ACI Student and Young Professional Activities Committee invites all young professional and mentors for a casual networking exchange following the Opening Reception. Attendees will meet with fellow young professionals, Student and Young Professional Activities Committee (SYPAC) members, and establish connections with ACI mentors. Bring your business cards to be entered into a drawing for door prizes.