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Webinar Archives
Aired | Webinar | Presenter | Length | Description | Recording | Presentation |
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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… 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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1/10/24 | Concrete Basics for Young Professionals | Tyler Ley, PhD, PE, FACI, FAcerS | 1 Hour |
Many issues related to construction can be all… Many issues related to construction can be alleviated by a fundamental understanding of the basics of concrete. This starts with knowledge of the standard components of a concrete mixture including cementitious materials, aggregates, water, and admixtures and their importance on the properties of fresh and hardened concrete. The combination of these materials in various proportions can produce mixtures suitable for a wide range of applications and placement methods. Once placed, the concrete must be properly cured to develop its intended properties. This presentation introduces the basics of concrete and describes its importance and application as a construction material. |
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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… 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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5/25/22 | Ultra High Performance Concrete (UHPC) – Design and Application | Travis Konda (Senior Technical Advisor, HNTB) and Mario Ratnaraj (Bridge Engineer, HNTB) | 1 Hour |
Ultra High Performance Concrete (UPHC) describes a class of concrete mat… Ultra High Performance Concrete (UPHC) describes a class of concrete material with a unique set of properties including: Strengths of 21,000 ksi plus, high ductility, low permeability and rapid strength gain. With these unique material properties, UHPC facilitates short development lengths, thin overlays and the potential for further development in optimized prestress girders for longer spans with less material. UHPC continues to play an important role in Accelerated Bridge Construction serving as the connecting material between precast elements allowing for small joints with short lap lengths while obtaining full connectivity between the elements. This presentation will introduce the audience to UHPC, the basic material properties, applications and lessons learned. |
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8/4/21 | How Keeping Your Coffee Hot and Your Beverages Cold Can Help You Understand Insulated Concrete Forms | Stephen M. Williams, AIA, NCARB from Design West Architects | 1 Hour |
This webinar will explore the use of Insulated Concrete Forms as a viabl… This webinar will explore the use of Insulated Concrete Forms as a viable and enduring building system. The webinar will explain the many benefits, economies, and attributes of Insulated Concrete Forms. The presenter will share lessons he has learned, details for implementation, things to avoid, and things to consider. The presenter will describe how Insulated Concrete Forms can be implemented into the design of net-zero energy buildings. Finally, a case study will help illustrate the benefits and properties of a thermal mass/thermal reservoir. |
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1/27/21 | Resiliency – Consideration Beyond Code Requirements | Shamim Rashid-Sumar, PE, FSFPE (National Ready Mixed Concrete Association) | 1 Hour |
Part of the Sustainable Structures Webinar Series… Part of the Sustainable Structures Webinar Series: Prescriptive building code requirements represent provisions for the least safe structure that may legally be built in a jurisdiction. Over the past 20 years, the building design and construction industry have witnessed an increase in the number of trade-offs of passive fire safety features for active systems. As natural disasters attributed to climate change continue to escalate, the population of neighborhoods located along with the wildland-urban interface increases, and fire and emergency access to buildings in densely populated areas is obstructed, multiple drivers arise to consider more robust construction for our built environment. The presentation will provide an overview of increased risks from natural and human hazards, identify approaches to mitigate their effects through voluntary and mandatory strategies and demonstrate the importance of incorporating standards for resiliency beyond minimum code requirements. |
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10/13/20 | ACI 360 – Design of Slabs on Ground | Scott Tarr, PE, FACI (North S.Tarr Concrete Consulting) | 2 Hours |
There are five commonly used procedures for designing industrial floor s… There are five commonly used procedures for designing industrial floor slabs. All of them are effective when their recommendations and details are followed. So, how does a designer choose the best method for a particular floor? The most common approach is to determine the type of floor construction needed for expected loading conditions. Then, from the design procedures, select the most appropriate method for determining floor thickness, reinforcement, joint spacing, and other details. This presentation will discuss the ACI 360 “Guide to Design of Slabs on Ground”. It will briefly address the planning, design, and detailing of slabs. Background information on design theories is followed by discussion of the types of slabs, soil-support systems, loadings, and jointing. Some worked design examples for various types of concrete slabs-on-ground will also be covered. |
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6/17/21 | Hot Weather Concrete | Ryan Scott (GCP Applied Technologies) | 1 Hour |
Hot weather conditions are not solely related to the air temperature whe… Hot weather conditions are not solely related to the air temperature when placing concrete. Those conditions are defined in ACI and ASTM documents. This presentation will focus on being able to define hot weather conditions and its effects on concrete in the plastic and hardened state. This presentation will also provide details on how to overcome the conditions of hot weather when placing concrete. |
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11/9/21 | Formwork Considerations for Building Design | Ryan Gregory (Ceco Concrete Construction) | 1 Hour |
This webinar will provide a general overview of common horizontal formin… This webinar will provide a general overview of common horizontal forming systems in use today. We will also discuss some project specific factors that drive the system selection process as well as review examples of building design factors affecting constructability and economy. |
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2/3/21 | Building More than Just the Pedestal: An Owner/Developer’s Perspective on Building All Concrete Multifamily Mid-Rise | Ryan Bedford (Bedford Development) | 1 Hour |
Part of the Sustainable Structures Webinar Ser… Part of the Sustainable Structures Webinar Series: Look around and you’ll see many five to seven story projects being built today with a one- or two-story concrete pedestal, supporting up to five floors of steel or wood frame. These “pedestal” projects are assumed to be the cheapest way to build while longer term ownership implications of these designs are not well understood. This one-hour presentation dispels the myths that are driving the popularity of pedestal construction and demonstrates the value concrete provides. The developer/owner’s perspective on building multi-family housing projects with Insulating Concrete Forms (ICFs) will be presented, and will include design, construction, and energy-efficiency implications, as well as tenant satisfaction. The presenter will overview his use of ICF’s and concrete for the exterior wall system at Kendal Lofts, a 42-unit project in Waukesha, Wisconsin. In addition, the presenter will also discuss his latest all-concrete residential projects in Wisconsin and Florida. |
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2/2/22 | Economic Outlook for 2022 | Ron Wirtz (Regional Outreach Director - Federal Reserve Bank of Minneapolis) | 1 Hour |
Using recent data and ongoing surveys by the Minneapolis Fed, Ron Wirtz … Using recent data and ongoing surveys by the Minneapolis Fed, Ron Wirtz (Regionial Outreach Director at the Federal Reserve Bank of Minneapolis) will discuss the speed and breadth of recovery in the construction sector and broader Minnesota economy, and role of labor force on economic growth going forward. Using an interactive survey, Ron will also gauge sentiment among event attendees regarding recent business activity, hiring demand, labor and wage trends, and the short-term economic outlook. |
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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… 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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10/21/20 | Construction Special Inspections | Rob Flickinger and Derek Van Heuveln (American Engineering Testing) | 1 Hour |
Anyone who has watched a building under construction can appreciate its … Anyone who has watched a building under construction can appreciate its complexity and sophistication. Occasionally, inspection and testing requirements occur that the local code official may not be qualified or experienced to address, so third-party assistance is needed. The building codes address this need through a specific requirement for structural tests and “special” inspections. A special inspection can be required for materials, installation, fabrication, erection or placement of components and connections where special expertise is needed. This presentation will cover the requirement of special inspections as well as some examples of when construction testing and inspections did not go as planned. |
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7/10/24 | Recycled Concrete Aggregate – What Do We Know? | Rita Lederle, Ph.D., Associate Professor, University of St. Thomas | 1 hour |
Recycled concrete aggregate (RCA) is crushed c… Recycled concrete aggregate (RCA) is crushed concrete used to replace virgin aggregate in new concrete. With impending aggregate shortages and a push for more sustainable concrete, interest in using RCA is very high. There have been numerous projects using RCA, but what do we actually know about it? This presentation will review what RCA is, how and why it affects new concrete, and the wide range of effects using RCA can have. Recent research on using RCA at low replacement levels will be briefly shared. |
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9/13/23 | Shoring and Reshoring Loads, Safety, Cost, Schedule, Concrete and Responsibility | Professor Ken Hover, Cornell University | 1 Hour |
Forms, shores, and re-shores are a temporary s… Forms, shores, and re-shores are a temporary structure that carries the weight and construction load of the permanent structure until it is strong enough to stand up for itself. While serving this temporary duty, forms, shores, and re-shores impact construction safety, cost, productivity, and schedule, and influence appearance, deformations, tolerances, and cracking of the hardened reinforced or prestressed concrete.
This presentation introduces Codes, standard specifications, OSHA, and ANSI documents that address responsibilities for forms and shores. By an example of a multi-story building, we look at how shore and re-shore systems work, including how shoring & re-shoring plans must be synchronized with rate-of-strength-gain of the concrete, as influenced by mix-design and ambient temperature. This complex topic demonstrates how schedule, concrete mix, weather, construction technology, lab and in-place testing all come together. |
A recording is not available for this webinar. |
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2/10/21 | Precast Concrete Storm Shelters | Paul Todd (Todd Architecture) | 1 Hour |
Part of the Sustainable Structures Webinar Ser… Part of the Sustainable Structures Webinar Series: This one-hour program is intended for professional designers and engineers. The attributes of precast concrete will be presented, demonstrating how these qualities may be applied to the design and construction of safe and efficient storm shelter facilities. The versatility and resiliency of precast concrete will be further highlighted by a video demonstration, and a series of case studies. |
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6/12/24 | Storm Shelters and Safe Rooms: Resilient Structures, Sustainable Communities | Pataya Scott, PhD (FEMA) and Glenn Overcash, PE (AECOM / FEMA Contractor) | 1 hour |
The presentation will provide background on safe rooms and storm shelter… The presentation will provide background on safe rooms and storm shelters as well as their performance objective, current design references, and where they are required in the IBC and IEBC. We will explore how design and construction criteria for safe rooms and storm shelters result in resilience to tornadoes and hurricanes and provide enhanced sustainability for communities. Precast and cast in place examples will be shared. |
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4/22/21 | Mass Concrete Constructability | Oscar R. Antommattei, MS, PE, FACI (Chief Concrete Engineer & Materials Engineering Manager, Kiewit) | 1 Hour |
Mass concrete (or thermally controlled concrete) typically requires impl… Mass concrete (or thermally controlled concrete) typically requires implementing thermal control measures to reduce maximum temperature and mitigate temperature difference. Specified temperature limits and thermal control requirements can affect mix design proportions, materials selection, reinforcement details, construction operations and compliance to specifications for the work. Many specifications still limit concrete temperatures to overly conservative default values without recognizing concrete properties and performance that allow alternative temperature limits more suitable for the specified work while maintaining quality and improving constructability. This issue frequently results in challenging scenarios that create design difficulties and unnecessary constructability problems for mass concrete. This presentation focuses on the implementation of today’s knowledge of mass concrete and best practices to overcome mass concrete challenges and facilitate solutions in projects. A special emphasis will be given to the technical updates provided for mass concrete requirements and guidance progressing in North America industry standards. |
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4/6/22 | Building Ethical Cultures | Nicole Zwieg Daly, J.D., Ed.D. (University of St. Thomas) | 1 Hour |
Ethical business cultures continue to prove to be more productive, more … Ethical business cultures continue to prove to be more productive, more innovative, and more meaningful places to work. Let's discuss how to build - and more importantly maintain - an ethical business culture. During this session, learn a little theory and a lot of practical knowledge to maintain your ethical business culture. |
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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… 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. |