Switzerland has a long tradition of exceptional structural engineers such as Robert Maillart (Salginatobel Bridge), Othmar Ammann (George Washington Bridge in New York), and Christian Menn (Leonard P. Zakim Bunker Hill Memorial Bridge in Boston). Throughout their careers in Switzerland and abroad, their achievements have contributed to a high quality of life. In recent years, however, there have been a number of catastrophic failures in concrete structures that question the quality of recent infrastructure developments. This presentation by Dr. Peter Richner uses a few examples to illustrate the source of the failures in a systematic way and proposes measures to overcome the current problems. Richner currently serves as Deputy Director and Head of the Department for Civil and Mechanical Engineering for EMPA (Materials Science and Research). As an influential part of EMPA for over 17 years, Richner has also been responsible for research funding and continuing education programs in areas of environmental influences on corrosion, service-life prediction of organic coatings, and the assessment of safety-relevant structures. Richner is the Project Leader for EMPA's project NEST - a holistic, dynamic, and flexible research and technology transfer platform for sustainable construction. Richner served for 3 years as President of RILEM, working to advance scientific knowledge as it relates to construction materials, systems, and structures worldwide.

ACI Mortar Workability Competition

1:00 PM - 5:15 PM

Session Moderator: Walter H Flood IV

In Honor of Dick Stehly: Increased Beneficial Use of Fly Ash - History, Accomplishments, and Challenges, Part 1 of 2

1:00 PM - 3:00 PM

Session Moderator: Lawrence L Sutter

This session is intended to honor the significant contributions of ACI Past President Dick Stehly with regard to increasing the beneficial use of fly ash in concrete in the United States. The session will provide a perspective on fly ash use from the vantage point of different stakeholders and will provide a historical and forward-looking perspective on issues related to increased beneficial use of coal fly ash in portland-cement concrete.

By attending this session, attendees will be able to:

1. Interpret the historical context for current practices associated with the beneficial use of fly ash;

2. Understand the positive sustainability impacts of increased beneficial use of fly ash;

3. Explain the benefits of increased beneficial use of fly ash with respect to concrete performance; and

4. Identify the key technological and political challenges impacting increased beneficial use of fly ash.

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Innovative Structural Slab Practices

1:00 PM - 3:00 PM

Sponsored by: 0000421-00

Session Moderator: Michael C Mota

Innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. This session discusses state-of-the-art practices in voided-slab technology construction. The concept centers on removing "concrete" from the middle of the slab where it is not structurally efficient, reducing the dead load by as much as 35% and thus allowing for large clear spans and efficient overall slab thicknesses. Several projects currently under construction in the United States will be discussed as case studies.

By attending this session, attendees will be able to:

1. Demonstrate two-way voided-slab systems;

2. Recognize shear modifications;

3. Explain stiffness modifications; and

4. Understand case studies and application

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Monitoring Performance during Construction, Part 1 of 2

1:00 PM - 3:00 PM

Sponsored by: 0000444-00

Session Moderator: Nakin Suksawang

Co Moderator: Branko Glisic

Structural health monitoring (SHM) provides significant advantages in developing a comprehensive and realistic approach for the assessment of concrete structures. However, its usage is not only limited to monitoring long-term performance but can also help provide critical information during construction. For example, concrete maturity, early-age shrinkage performance, curing effects, environmental conditions, and other aspects can be measured using SHM technologies. This information can help the contractors, producers, and consulting engineers rapidly adjust their construction practices, mixtures, and designs. This session will discuss current SHM systems and/or innovations for assessing the performance of concrete structures during construction and the need for improved techniques for performance monitoring of reinforced concrete structures. Innovative and effective SHM techniques for monitoring the performance during construction of concrete structures will be presented.

By attending this session, attendees will be able to:

1. Recognize the need for improved techniques for performance monitoring of reinforced concrete structures;

2. Identify SHM technologies for real-time performance monitoring of concrete structures during construction;

3. Examine how SHM technologies are applied to quality control/quality assurance; and

4. Analyze the cost benefits of SHM technologies for new construction.

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I-35W Bridge Tour

2:00 PM - 4:00 PM

This tour is SOLD OUT.

In the wake of the collapse on August 1, 2007, of the I-35W bridge over the Mississippi River near downtown Minneapolis, the I-35W St. Anthony Falls Bridge was built in record time, opening just 13 months later on september 18, 2008. The collapsed eight-lane steel-truss arch bridge was Minnesota's fifth busiest, being replaced with a 10-lane box-girder concrete bridge using high-performance concrete, including mass and high-strength concrete. The bridge is equipped with 323 sensors that regularly monitor bridge conditions, data which is analyzed by University of Minnesota personnel. Join us for a bridge tour guided by an MnDOT representative, and be sure to take some time to view the multicolor lighting of the bridge at night. Buses will be scheduled for pickup at the convention hotel; the entire event will be 2 hours.

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I-35W Bridge Tour

2:00 PM - 4:00 PM

This tour is SOLD OUT.

In the wake of the collapse on August 1, 2007, of the I-35W bridge over the Mississippi River near downtown Minneapolis, the I-35W St. Anthony Falls Bridge was built in record time, opening just 13 months later on september 18, 2008. The collapsed eight-lane steel-truss arch bridge was Minnesota's fifth busiest, being replaced with a 10-lane box-girder concrete bridge using high-performance concrete, including mass and high-strength concrete. The bridge is equipped with 323 sensors that regularly monitor bridge conditions, data which is analyzed by University of Minnesota personnel. Join us for a bridge tour guided by an MnDOT representative, and be sure to take some time to view the multicolor lighting of the bridge at night. Buses will be scheduled for pickup at the convention hotel; the entire event will be 2 hours.

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Field Measurements of Form Pressure Exerted by Self-Consolidating Concrete

3:30 PM - 5:30 PM

Sponsored by: 0000347-00

Session Moderator: Kamal H Khayat

These presentations will report on the latest information regarding the measurement of lateral pressure exerted by self-consolidating concrete (SCC). Examples include extensive field studies carried out on shear walls, column, and wall elements in building construction and infrastructure rehabilitation projects. Comparison between field measurements and various design models, including those proposed in ACI 347, CSA A23.1, and DIN, will be highlighted. Fresh concrete properties affecting formwork pressure and the decay in pressure until pressure cancelation are highlighted, and new test methods that can be used to evaluate these characteristics are illustrated.

By attending this session, attendees will be able to:

1. Demonstrate how to evaluate lateral pressure exerted by SCC on formwork systems;

2. Recognize examples of various prediction models to estimate lateral pressure exerted by SCC;

3. Explain the various methods to assess fresh concrete properties and concrete placement conditions affecting form pressure characteristics; and

4. Specify emerging technologies in civil infrastructures and building construction.

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In Honor of Dick Stehly: Increased Beneficial Use of Fly Ash - History, Accomplishments, and Challenges, Part 2 of 2

3:30 PM - 5:30 PM

Session Moderator: Lawrence L Sutter

This session is intended to honor the significant contributions of ACI Past President Dick Stehly with regard to increasing the beneficial use of fly ash in concrete in the United States. The session will provide a perspective on fly ash use from the vantage point of different stakeholders and will provide a historical and forward-looking perspective on issues related to increased beneficial use of coal fly ash in portland-cement concrete.

By attending this session, attendees will be able to:

1. Interpret the historical context for current practices associated with the beneficial use of fly ash;

2. Understand the positive sustainability impacts of increased beneficial use of fly ash;

3. Explain the benefits of increased beneficial use of fly ash with respect to concrete performance; and

4. Identify the key technological and political challenges impacting increased beneficial use of fly ash.

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Monitoring Performance during Construction, Part 2 of 2

3:30 PM - 5:30 PM

Sponsored by: 0000444-00

Session Moderator: Hani H Nassif

Co Moderator: Faris A Malhas

Structural health monitoring (SHM) provides significant advantages in developing a comprehensive and realistic approach for the assessment of concrete structures. However, its usage is not only limited to monitoring long-term performance but can also help provide critical information during construction. For example, concrete maturity, early-age shrinkage performance, curing effects, environmental conditions, and other aspects can be measured using SHM technologies. This information can help the contractors, producers, and consulting engineers rapidly adjust their construction practices, mixtures, and designs. This session will discuss current SHM systems and/or innovations for assessing the performance of concrete structures during construction and the need for improved techniques for performance monitoring of reinforced concrete structures. Innovative and effective SHM techniques for monitoring the performance during construction of concrete structures will be presented.

By attending this session, attendees will be able to:

1. Recognize the need for improved techniques for performance monitoring of reinforced concrete structures;

2. Identify SHM technologies for real-time performance monitoring of concrete structures during construction;

3. Examine how SHM technologies are applied to quality control/quality assurance; and

4. Analyze the cost benefits of SHM technologies for new construction.

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Opening Session and Awards Program

5:45 PM - 7:00 PM

Session Moderator: James K Wight

The ACI Spring 2013 Convention officially begins during the Opening Session and Awards Program. Over 100 individuals and groups will be recognized for their contributions to the concrete industry.

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Opening Reception

7:00 PM - 8:00 PM

After the Opening Session, make your way through the exhibit area as you network with colleagues and friends. A cash bar and light refreshments will be available.

A photographer will be available to take complimentary professional headshots for attendees.

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Hot Topic Session: Responsibility in Concrete Construction

8:00 PM - 10:00 PM

Session Moderator: Jeffrey W Coleman

The responsibility and authority for concrete construction works is sometimes not as clear as we would like. ACI Committee 132, Responsibility in Concrete Construction, has prepared a session to discuss the duties and authorities of all parties on a construction project. Perspectives from many of the parties will be given in short presentations followed by a panel discussion with the attendees.

By attending this session, attendees will be able to:

1. Understand the new ACI 132 document, its predecessors, history, and origin, as the new document will soon be published;

2. Learn about the alignment (and misalignment) of authority and responsibility regarding problems that can arise;

3. Learn how the responsibility for a good project must pass between and among good parties; and

4. Identify key issues that arise when responsibilities are not clearly or appropriately defined.

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Student and Young Professional Networking Event

9:00 PM - 10:30 PM

The ACI Collegiate Concrete Council and ACI Student and Young Professional Activities Committee invite all convention attendees to the Student and Young Professional Networking Event. Meet fellow students and young professionals while networking with ACI members in a fun and casual environment. Attendees to the event will be entered into a drawing for door prizes. In addition, attendees will be able to purchase food and beverages.

Rock Bottom Brewery is located at the corner of 9th Street South and Hennepin Avenue, approximately 10 minute walking distance.