Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
Salepage : Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
Archive : Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
FileSize :
Presenter (s):
Nate Rende
Duration:
37 Minutes
Format:
Audio and Video
License:
Access for 6 month (s) after purchase.
Nondestructive testing is often used in conjunction with traditional methods to assess construction, material, or structural deficiencies in new construction. This presentation describes evaluation of unique delamination failures within below-grade, exterior walls of a new subway station. The walls were conventionally reinforced mass concrete cast against a soldier pile and lagging retention system. Shortly after construction, leakage at cracks and joints was observed and injection processes led to delamination of the interior surfaces. The assessment Objectives were to determine the extent and cause of near-surface discontinuities and evaluate the structural integrity of the walls. Nondestructive testing included flaw detection using Impulse Response [structural mobility testing] and reinforcement locating using ground-penetrating radar. Sampling and petrographic examinations were conducted to correlate test results with distress conditions and evaluate the in-situ concrete. Analysis of construction records, mix designs, and thermal performance records enabled determination of the cause of the discontinuities. Partial depth repairs were implemented to restore structural capacity.
Presentation Learning Objectives:
Understand the use of NDE methods for assessment of internal concrete distress
Understand effective data presentation and reporting of NDE results
Understand how construction records can be helpful in determining the cause of observed distresses
Understand the fusion of field assessment, laboratory testing and structural analysis to develop a solution for distress in existing structures
Esentation Slides (2.2 MB) 14 Pages Available after Purchase
Nate Rende
Mr. Rende is an Associate Principal with WJE and has managed a broad range of assignments, including structural condition assessment, failure investigation, testing and instrumentation, and repair design. He specializes in applying nondestructive evaluation (NDE) methods to the evaluation of concrete, stone and masonry structures. Mr. Rende is affiliated with several professional societies and has given technical run and seminars in nondestructive evaluation throughout the US.
What is Everything Else?
Everything Else is a product category on Amazon that is meant to be a catch-all for items that don’t fit into any other categories. Over time, as the Amazon catalog has grown and more specific product categories have been added, Everything Else has become less useful and more of a junkyard for cast off and forgotten listings.
Until recently, however.
Why are items listed in Everything Else when they shouldn’t be?
The answer to this is fairly simple. Some sellers are using Everything Else as an opportunity to get around Amazon’s gated category requirements. For example, DVDs with an MSRP of over $25 are now gated Selling certain products and bran… More and require permission to list. So we’ve seen some sellers create new listings in Everything Else to get around these requirements. We’ve noticed similar “workarounds” for other gated or restricted Selling certain product categorie… More categories as well.
Amazon doesn’t like this. It just makes the catalog more of a mess than it already is and ends up creating a worse customer experience.
Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
Readmore About : Nondestructive Evaluation and Repair of Concrete Retaining Walls at New Subway Station
