Webinar Archives

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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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The webinar explores two concepts; First is the preventative measures and the services around firestop consulting, inspections, and what architects, contractors, project managers, and installers should keep in mind as they plan, construct, and maintain firestops in their facilities. Second is what happens when a fire does occur, how does it affect the concrete, and what assessments and testing can be completed onsite to determine repair or replacement options.

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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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This presentation provides an overview of extended joint slabs primarily used on industrial warehouse floors. An overview of the stresses that must be controlled in order to extend joints will be discussed. Two case studies of extended joints will be presented; one of which is the Twin Cities metro area.

Learning Objectives:
1.    Address the reasons why joints are extended.
2.    Explain how shrinkage and thermal stresses have an impact on joint spacing.
3.    Review the families of technology associated with extended joints.
4.    Define joint widening and how this can impact slab performance.

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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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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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This presentation will focus on alkali-silica reaction (ASR) in concrete.  A brief background of the reaction mechanisms and ways to prevent the reaction will be covered.  The reliability of standard test methods, within the context of current standards (ASTM C1778 and AASHTO R80) will be highlighted. In addition, several current research projects and international efforts in the area will be highlighted. 

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This presentation will introduce the work of NEU, an ACI Center of Excellence for Carbon Neutral Concrete, and discuss the important role of concrete in reaching carbon neutrality. The presentation will provide an overview of key terms and concepts, the latest information on green concrete codes, and examples of low carbon practices for the concrete industry for the present and future.

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This session will review a few recent projects that were done completely in Insulated Concrete Forms and discuss some of the lessons learned when it comes to detailing.   From sub-grade installation to coordinating metal joist connections to exterior options, this presentation will illustrate some good options for you own ICF project.  Discussion about the ability for ICF to be a part of a Net Zero solution will also be a part of the presentation.

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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.