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Aired Webinar Presenter Length Description Recording Presentation
11/12/20 Ethics - Not Black and White but Shades of Gray William Rushing, P.E., F.ACI (Vice President, Waldemar S. Nelson & Co., New Orleans, LA) 1 Hour

Making a decision that requires ethical consideration is usually not eas…
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Making a decision that requires ethical consideration is usually not easy. Rarely are we faced with an ethical question that has a corresponding answer that is clearly black and white. Doing the ethical thing can require effort and determining the correct path may include many variables that cause us to pause and consider what the right decision is. In this presentation, the speaker will discuss some scenarios that illustrate the grey area that can be "ethics." The presenter will work through the scenarios an offer insight on determining the correct and ethical way to proceed through a decision-making process.

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7/14/21 Concrete Overlays of Existing Asphalt Streets and Parking Lots Jon Hansen and Phil Kresge (NRMCA) 1 Hour

The performance life of asphalt surfaced parking lots can be extended by…
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The performance life of asphalt surfaced parking lots can be extended by placing a bonded concrete layer on top of the existing asphalt. This technique has been used for many years for highway, street, and parking lot pavements but still engineers and owners are unfamiliar with the process. This session will cover the publication entitled the Guide to Concrete Overlays of Asphalt Parking Lots and demonstrate the steps necessary to properly design and construct a concrete overlay.

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9/2/20 Net Zero, ICF Design for Rural/Tribal Projects Michael Laverdure, AICAE, AIA, NCARB, LEED AP (DSGW Architects) 1 Hour

This webinar will outline the benefits of using Insulated Concrete Forms…
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This webinar will outline the benefits of using Insulated Concrete Forms (ICFs) in construction, especially in regard to Rural and Tribal projects.  ICFs are a key component in DSGW’s strategy to design Net Zero projects.  This presentation will show examples of ICF and Net Zero design, in particular the Fort Totten Alternative CTE School, the country’s first Net Zero school on Tribal lands in North America.  

The 12,500 square foot, $3.8 million net zero Fort Totten Alternative CTE School was designed to produce more energy than it consumes while ensuring to meet other standards common when designing a net zero facility. There are other net zero schools in the United States, but this new school is the first to be built on tribal land and the first in North Dakota.

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12/8/20 New ACI Design Guides for Fiber Reinforced Concrete, and Other Developments in FRC Mike Mahoney, PE, FACI (Euclid Chemical) 1 Hour

The use of Fiber Reinforced Concrete continues to evolve and become more…
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The use of Fiber Reinforced Concrete continues to evolve and become more common place in everyday concrete construction. Learn how the new ACI 544.4R document can help ready- mix producers, engineers and contractors by providing a roadmap to designing FRC for many applications including floors, precast, shotcrete and paving applications. An update will also be provided on other CODE approvals such as UL fire classification for composite deck designs, various DOT initiatives for paving with FRC and the improvements in ASTM and other test methods to verify correct fiber selection and quantities in concrete.

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1/13/21 Better Design Through Embodied Carbon - Part One of the Sustainable Structures Webinar Series Emily Lorenz, PE 1 Hour

Part of the Sustainable Structures Webinar Series
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Part of the Sustainable Structures Webinar Series: Now that architects have a good understanding of environmental impacts related to energy use, the next design frontier in tackling climate change is reducing the embodied carbon in buildings. This live webinar will focus on best practices for determining the embodied carbon in a building, including credible sources for embodied carbon data. It will introduce common practices and misconceptions about comparisons of embodied carbon. A case study will be presented that highlights how design decisions may be influenced when comparing among up-front carbon, use-phase carbon, or whole-life carbon. The presentation will highlight existing tools related to quantifying embodied carbon.

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1/6/21 The Use of Insulating Concrete Forms for Commercial Construction - Contractor's Perspective Justice Olson (Nudura) and DC Mangimelli (Fox Blocks) 1 Hour

Lighter, faster and more cost effective than other forms of construction…
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Lighter, faster and more cost effective than other forms of construction, Insulating Concrete Forms (ICFs) are quickly becoming the construction method of choice for all forms of construction including single and multi-family, hotels, schools, offices. Concrete contractors, masons and framers have an opportunity to learn how their trade can work with ICFs to enhance their competitiveness in today’s construction environment. The presentation will focus on how to communicate basic ICF detailing, design efficiencies, and other necessary information to designers who may not be familiar with ICF construction. Also included in the presentation will be information on how ICF’s can affect other sections of the specification, best construction practices, and tips on how to determine labor costs for an ICF project.

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1/28/21 Pumping Air Entrained Concrete and the Super Air Meter Tyler Ley Ph.D., P.E. - Professor at Oklahoma State University 1 Hour

This presentation will discuss changes in the volume of air entrained co…
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This presentation will discuss changes in the volume of air entrained concrete in pumped concrete. The work shows that during pumping the air volume will decrease and if measured immediately after pumping will be lower than what is found in the final concrete. These findings are supported by hardened air void analysis, freeze thaw tests, and measurement of the air void volume and spacing over time in the fresh concrete with the Super Air Meter. The presentation makes recommendations for modifications to the current testing specifications based on the findings.

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7/22/21 Non-Destructive Testing – Advanced Technology and a Practical Review of How to Use It Larry D. Olson, P.E. (President and Chief Engineer, Olson Engineering, Inc., and Olson Instruments, Inc.) 1 Hour

As computing power become faster and smaller it leads to advances in non…
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As computing power become faster and smaller it leads to advances in non-destructive testing (NDT) techniques for structural concrete condition assessment. We will explore some of the newest techniques in the market and discuss how they can be use on structures and construction projects. We will also review a practical approach to finding construction flaws such as honeycomb, void and cracking in new structures as well as scanning to map out corrosion damage in aging structures using many different Non-Destructive Testing techniques.

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7/14/20 Supplementary Cementitious Materials Dr. Larry Sutter 1 Hour

This presentation will cover the basics of common supplementary material…
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This presentation will cover the basics of common supplementary materials used in concrete. Common applications, comparisons of their properties in plastic and hardened concrete, as well as the outlook of their future use will all be covered in the presentation.

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9/1/21 Cold Weather Concrete Ken Hover, PhD (Professor, Cornell University) 1 Hour

There is a lot more to cold-weather concrete than just preventing freezi…
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There is a lot more to cold-weather concrete than just preventing freezing. This webinar will discuss the reasons to protect concrete in cold weather, the ACI definition of cold weather, methods to protect concrete from freezing, and other topics beneficial to contractors, designers, owners, and suppliers who design and build projects in cold weather.

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1/28/21 Concrete Pumping 101 Jim Bury, Director of Placing Equipment at Conforms. 1 Hour

The concrete pumping equipment available today is more advanced, reliabl…
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The concrete pumping equipment available today is more advanced, reliable, and prolific than ever before. So why can’t I find one that can move this perfect mix I just created?

The factors that can affect concrete pumping are numerous, inter-related, and sometimes hidden, making the predicting of pumpability seem elusive. So how is the construction industry, which is becoming ever more cost conscious and filled with complicated and demanding concrete requirements, to deal with it on a more simplified level?

This presentation will discuss some of the over 50 factors that affect concrete pumping, the basics of how concrete pumping works, how mix designs can be adjusted to accommodate the application’s multiple requirements, and what can be done to help eliminate the jobsite problems that result in a finger pointing exercise and costly downtime.

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11/4/20 Economic, Construction & Cement Outlook: Cyclical & Structural Changes Resulting from Covid Dave Zwicke (Portland Cement Association) 1 Hour

The webinar covers Minnesota's cement/concrete trends and where the …
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The webinar covers Minnesota's cement/concrete trends and where the market is headed in the next few years. We will examine economic growth scenarios that may unfold under differing assumptions regarding COVID-19. Where are the growth opportunities? Will there be structural changes to the construction market following the recession? The presenter is Dave Zwicke who is Sr. Director of Economic Analysis at the Portland Cement Association.

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8/10/21 Parking Structures: Common Problems and Best Practices Michael W. Lee (Principal at Wiss, Janney, Elstner Associates) 1 Hour

This presentation reviews strength and serviceability problems in concre…
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This presentation reviews strength and serviceability problems in concrete parking structures. The effects of environmental exposure, vehicular loading, and deterioration will be discussed with an emphasis on key differences between buildings, parking structures, and bridges. Case histories will be provided to illustrate common problems, failures, and remediation methods. Precast concrete and cast-in-place systems will be discussed, including problems that occurred during construction. The presentation will include examples of changes that have occurred in the industry to enhance safety and long-term performance.

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7/23/20 FIU Pedestrian Bridge Collapse: Testing of Full-Size Replicas of Failed Connection Gary J. Klein, PE, SE 1 Hour

WJE carried out independent studies related to the 201…
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WJE carried out independent studies related to the 2018 collapse of the FIU Pedestrian Bridge in Miami. Most significantly, WJE developed and tested full-sized specimens to evaluate the significance of the National Transportation Safety Board’s (NTSB’s) finding that the construction joint between the northernmost diagonal and deck was left in an as-placed condition, rather than intentionally roughened as required by the project specifications. The webinar also describes WJE’s independent review of shear friction strength in accordance with the AASHTO Code.

 

The presentation describes the details of the experimental program that demonstrated that, had the construction joint been roughened as required by the project specifications, the collapse would not have occurred. Contrary to NTSB’s findings, the contractor’s failure to roughen the surface was the primary cause of the collapse.

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2/9/21 Performance Based Specifications Support Sustainability Colin Lobo, Ph.D., P.E. (NRMCA) 1 Hour

With the increased focus on sustainability initi…
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With the increased focus on sustainability initiatives in construction, prescriptive requirements in specifications often restrict the concrete producer’s ability to optimize concrete for sustainability without compromising functional performance for project needs. The presentation will discuss these impacts and outline the development of a guide performance specification by ACI Committee 329.

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NRMCA - Specifying Sustainable Concrete

NRMCA - Guide to Specifying Ready Mixed Concrete (2015)

9/17/20 Concrete Cracking Kim D. Basham, PhD, PE, FACI (KB Engineering, LLC) 1 Hour

Concrete provides structures with strength, rigidity, and resilience fro…
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Concrete provides structures with strength, rigidity, and resilience from deformation. These characteristics, however, result in concrete structures lacking the flexibility to move in response to environmental or volume changes. Cracking is usually the first sign of distress in concrete. Cracking of concrete flatwork is natural, expected, and accepted. However, cracks may affect appearance, performance, and maintenance costs.  This presentation will discuss the various types of concrete cracks and how to best minimize their occurrence.

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4/15/20 MN Concrete Forum: Environmental Product Declarations - The New Normal? Curt Turgeon (MnDOT Pavement Engineer) 1 hour

The webinar introduces the concepts of Product Category Rules, Environme…
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The webinar introduces the concepts of Product Category Rules, Environmental Product Declarations and Life Cycle Assessment. Legislative and Industry developments are addressed to inform the audience of why these concepts will likely become a part of daily lives in the near future.

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2/23/21 Avoiding Damage, Distress, and Disappointment in Concrete Structures Michael W. Lee (Principal at Wiss, Janney, Elstner Associates) 1 Hour

This presentation reviews failures, damages, and other incidences of poo…
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This presentation reviews failures, damages, and other incidences of poor performance in concrete structures that have served to shape today's building codes and the standard of care for the profession. Examples range from well-documented, high-profile collapses to lesser known but similarly influential structural and serviceability problems. Case histories will include discussion of excessive cracking, the cause of such distress, and mitigation measures. The case histories will illustrate how small details can often mean the difference between success and disappointment; and how codes have evolved to reduce the risk of future failures.

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4/22/21 Mass Concrete – How Big is Big? Robert Howell, P.E. (Professional Development Program Engineer, American Concrete Institute) 1 Hour

What is mass concrete? ACI 207.1R defines mass concrete as any volume of…
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What is mass concrete? ACI 207.1R defines mass concrete as any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of the cement and attendant volume change to minimize cracking. But how does one predict whether mass concrete problems will occur and what steps should be taken? This presentation will discuss how to identify mass concrete, ACI 301 requirements pertaining to it, and good construction practices.

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