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On Demand

Presenters:
Stewart Abrams
Duration:
41 Minutes
Format:
Audio and Video
License:
Short Description:
Richard Miller Treatment Plant is a 240 mgd cap. potable water treatment facility located in the California area of the Cincinnati, Ohio, US. After installing an advanced ultraviolet (UV) disinfection treatment system in 2013, GCWW became the largest water utility in North America to use UV light following sand filtration and granular activated carbon. The concrete filter gallery building was originally constructed in 1907 with 26 filters, with a 14-filter addition in 1937 and 7 filters added in 1964. After over 110 years of service, the structures started showing significant signs of deterioration, most commonly concrete spalling and reinforcing steel corrosion. This case study will highlight the methods used to evaluate the structures that involved conventional methods such as sounding, crack mapping, chemical and petrographic examinations, along with technology such as Half-Cell Potential/ICOR, Impact-Echo, Ground Penetrating Radar, and UAS (Drone) services.
Price:
$15.00 - $25.00

Not Found
On Demand

Presenters:
Dr. Ali Abu Yousef |  Michael Ahern
Duration:
47 Minutes
Format:
Audio and Video
License:
Access for 6 month(s) after purchase.
Short Description:
After only six years of service, a 6-foot long narrow piece of concrete spalled off an exposed slab edge of a 680-foot tall high-rise in Texas, and fell 160 feet to the podium below. The spall was attributed to premature corrosion at the drip edge. The building featured approximately 9,200 feet of exposed slab edge over its height. Given the potential risk to safety and property of additional concrete spalls, the Owner requested forensic investigations, which (1) identified other areas with signs of similar distress and (2) determined the underlying problem of low reinforcement cover at the drip edge was pervasive. In response, repair options were developed to address the problem and restore intended durability. Given the building height, difficult exterior-only access, downtown environment, and post-tensioning anchors along the slab edge, the repair design and construction both had unique challenges to consider and overcome.
Price:
$15.00 - $25.00

Not Found
On Demand

Presenters:
Mr. Matthew Sherman
Duration:
1 hour
Format:
Audio and Video
License:
Short Description:
This session will explore the differences between bonded and unbonded topping slabs, discuss materials- and installation-related causes of failures, and provide guidelines to properly implement each type of topping slab.
Price:
$25.00 - $40.00

Not Found
On Demand

Presenters:
Pete Haveron
Duration:
1 hour
Format:
Audio and Video
License:
Short Description:
This webinar will discuss the keys to proper surface preparation including establishing the appropriate level of surface profile, evaluating the concrete substrate and the material being installed to determine the correct level of preparation as well as the correct methods and tools to achieve that level.
Price:
$0.00 - $40.00

Not Found
On Demand

Presenters:
Richard First
Duration:
1 hour
Format:
Audio and Video
License:
Short Description:
This webinar will review the causes for cracking in concrete and the standard, preventative methods for addressing movement.
Price:
$0.00 - $40.00

Not Found
On Demand

Presenters:
Belin Wills |  Ethan Namink
Duration:
1 hour
Format:
Audio and Video
License:
Short Description:
This unique webinar specifically focuses on the technology, process & application of using high-pressure water to remove concrete, called Hydro Demolition.
Price:
$0.00 - $40.00

Not Found
On Demand

Presenters:
Michael Sprinkel
Duration:
37 Minutes
Format:
Audio and Video
License:
Short Description:
The prestressed beams in the Hampton Roads Bridge Tunnel Approach Spans were fabricated in about 1960 (west bound lane) and 1970 (east bound lane). The spans are 50-ft and 75-ft, respectively. The brackish water environment caused corrosion and failure of the bottom strands and deterioration and spalling of the cover concrete in many beams. A project in 2018 strengthened 30 of the more deteriorated beams as an alternative to posting or replacing the bridges. Carbon fiber composite wrap (CFCW) and external post-tensioning (PT) were used to strengthen the beams. Prior to construction, a PT mockup was done with one 50-ft (flexible filler) and one 75-ft (grout) beam to demonstrate that the contractor had the materials, equipment and staff to successfully do the external PT. This presentation describes the project’s mockups and construction and the anticipated increase in strength to be obtained from application of the CFCW and external PT.
Price:
$15.00 - $25.00

Not Found
On Demand

Bundle:
Fall Conference Bundle
Presenters:
Edmund L Baum
Duration:
17 Minutes
Format:
Audio and Video
License:
Access for 6 month(s) after purchase.
Short Description:
Construction errors such as the misplacement of reinforcing steel and modifications like the addition of openings traditionally required intrusive repair methods. The addition of structural steel support or enlargement of the concrete elements is often not aesthetically pleasing or practical and the cost and time impacts are onerous. FRP strengthening solutions are non-intrusive, practical, and can be implemented quickly without major impact on the other building trades. The presentation will guide the audience through the feasibility assessment of FRP strengthening and implementation of the strengthening solution. The roles of the various parties, including the Engineer of Record, the FRP Design Engineer, the General Contractor, the Structural Contractor, and the FRP Installer, will be illustrated. Photographs of completed repairs will be presented.
Price:
$15.00 - $25.00

Not Found
On Demand

Bundle:
Fall Conference Bundle
Presenters:
Brent Anderson, P.E.
Duration:
40 Minutes
Format:
Audio and Video
License:
Access for 6 month(s) after purchase.
Short Description:
Dealing with water is always a challenge when constructing a new structure. Whether it is water infiltration that was expected, or water manages to circumvent pre-planned waterproofing methods, it can wreak havoc on the building and interfere with construction schedules. The term “belt and suspenders” is often used in waterproofing and there is a good reason for it. Water chooses the path of least resistance, and many times that path is not discovered until it is too late. There are many methods of water control that can be implemented before, during and after a structure is completed. This presentation will focus on water control methods for new construction that can be implemented during or after the construction process.
Price:
$15.00 - $25.00

Not Found
On Demand

Presenters:
David G. Tepke
Duration:
42 Minutes
Format:
Audio and Video
License:
Access for 6 month(s) after purchase.
Short Description:
Repairing and extending the service life of concrete in severe environments first requires that one understands what may be considered severe why it may be considered so. This presentation will discuss the ways in which different organizations and technical committees around the world define ‘severe environments’ for concrete structures; types of deterioration mechanisms and materials-related distress that may severely and quickly deteriorate concrete, type of structures with potentially severe environments, and U.S. geographical considerations.
Price:
$15.00 - $25.00

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