COST of Wisconsin Blends Art and Engineering to Help Create New Gilder Center at AMNH
By: Martin Palicki and Jared Stanwyck
It’s rare that a building’s design can become so immediately iconic – an attraction unto itself. Gaudi’s Sagrada Familia in Barcelona comes to mind. It is a visual feast – a sculpture that takes the shape of a building. Many architecture critics are already claiming the same for the newly opened Gilder Center at the American Museum of Natural History (AMNH) in New York City.
Moyie Dam Repair: Back to the Future
By: Mike Newcomb and Leo Waddell
Moyie Dam at Bonner’s Ferry in northern Idaho started initial construction just before WWII. They shut down construction during the war. After the war was over, the dam went into service in the late 1950s. The dam is hydroelectric, and the dam’s surplus electricity is purchased by Seattle Light—Washington’s electric company. After running high-velocity water down the spill-way for decades, by 1980, the concrete was significantly deteriorated and needed to be rehabilitated.
The Neville Island Bridge Project
By: Ted Sofis
The Neville Island Bridge Rehabilitation project originally came out for bid in 2018. The bridge is located in Allegheny County, PA and within PennDOT’s District 11. In the bid package, it was noted that construction could not begin until a nesting pair of Peregrine Falcons had fledged their young, which translated to a late summer start.
O’Hare Plaza West Drive and Executive Garage Restoration
By: Joshua Freedland
While infrastructure projects such as parking garages are often the last projects to be funded due to their utilitarian nature, they are important to the health of commercial properties since they are often the first impression for tenants and visitors.
Shotcrete as Roadside Slope Protection in Brazil
By: André Bezerra de Menezes, Juliana Borella de Menezes, & Lucas Passos Santana
The use of shotcrete has proven to be of paramount importance in the treatment process of the slopes along the margins of SP 333 highway in the interior of the state of São Paulo, Brazil. This application focused on a stretch covering kilometers 337 to 385, connecting the cities of Marília and Assis. The implementation of shotcrete in this challenging location represents not only a technical choice but also a strategic response to the specific challenges presented by the slopes along this section of the highway.
Concreto Projetado como Proteção de Taludes Rodoviários no Brasil
By: André Bezerra de Menezes, Juliana Borella de Menezes e Lucas Passos Santana
Autilização do concreto projetado revelou-se de suma importância no processo de tratamento dos taludes ao longo das margens da rodovia SP 333, no interior do estado de São Paulo, Brasil. Essa aplicação concentrou-se em uma extensão que abrange os quilômetros 337 a 385, que conectam as cidades de Marília e Assis. O emprego do concreto projetado nessa localidade representa não apenas uma escolha técnica, mas também uma resposta estratégica aos desafios apresentados pelos taludes ao longo desse trecho da rodovia.
The Rondout Bypass Tunnel Shafts – Shotcrete Lining
By: Paul Madsen, Bade Sozer, Thomas Hennings, & Eileen Test
The Rondout Bypass Tunnel in New York has two access shafts. The upper sections of the shafts are lined with steel pipe to resist a substantial net internal water head. Initial design included a ¾ in. (19 mm) thick cement mortar lining (CML) for all three components. Because of concerns with CML application on largediameter pipes, the protective lining was redesigned for shotcrete application.
Advancements in Train Bridge and Underpass Construction: Architectural and Structural Shotcrete over Sheet Piles at Ross Street Underpass in Salmon Arm, BC
By: Dan Pitts
Salmon Arm, British Columbia, is witnessing a paradigm shift in train bridge construction with the adoption of innovative techniques such as architectural shotcrete over steel sheet piling. This method not only enhances the structural integrity and durability of the bridges but also contributes to the aesthetic appeal of the infrastructure for the Ross Street Underpass.
Shaw Residence
By: Andy Duck
How does one provide a backyard transformation that includes a water-in-transit pool, complete with all the outdoor living amenities one could ask for when facing a 75° waterfront sand cliff located on an ever-shifting chain of barrier islands susceptible to a multitude of severe weather patterns?
Water’s Edge
By: Bill Drakeley
The Water’s Edge pool project was a contracted water feature that drew its contemporary design from the architecture of the new house addition. The house is a modern version of the old coastal mansions once built and adorned by the Rockefellers, Morgans, and Vanderbilts.
Watershape University: Filling a Void
By: Bill Drakeley
Swimming pools are so commonplace; it’s easy to take them for granted. When we step back and consider, in specific terms, what the industry is about and what it does, however, we find a profound and even surprising need for education as well as licensing and certification.
It’s a big industry. The U.S. boasts 10.7 million swimming pools, both commercial and residential.
Risk Management
By: Theo Goodwell
In the world of shotcrete, we often speak about the importance of safety: how to handle the nozzle safely, how to hold the nozzle to protect your back, the impor- tance of proper personal protective equipment (PPE), and even pump and vehicle maintenance. How all these safety measures affect your bottom line is the world of risk management, and risk management affects productivity and insurance premiums.
Why We Need a Design Code for Concrete Pools
By: Charles Hanskat, PE, F.ACI, F.ASCE, ASA Executive Director
The swimming pool design and construction indus- try is not highly regulated, and in some cases, it is simply not regulated. Some states and municipalities require licensed professional engineers to design all pools. Some jurisdictions require only commercial pools to have a set of plans and specifications that are produced and sealed by a licensed design engineer. Unfortunately, they have no requirements for a licensed engineer to design a residential pool.
Cementing a Legacy: A Concrete Understanding of Municipal Skatepark Development
By: Mark Bradford and Aaron Spohn
Skateparks have soared in popularity as public facili- ties. Globally, cities are embracing the once-deemed risky activity and shedding any previous notions of skateparks being mere passing trends. As many municipali- ties embark on constructing their first—and possibly only— skatepark, city staff members find themselves in a position where they must rapidly acquire knowledge about what constitutes a skatepark and how to successfully develop one.
Can Shotcrete be Affected by Alkali Silica Reaction?
By: Mark Lukkarila, F.ACI
The American Concrete Institute (ACI) defines alkali- silica reaction (ASR) in ACI CT-23: ACI Concrete Terminology as “the reaction between the alka- lies (sodium and potassium) in portland cement and certain siliceous rocks or minerals, such as opaline chert, strained quartz, and acidic volcanic glass, present in some aggregates.”
Programa de calificación para contratistas de concreto lanzado para piscinas de ASA
By: Por Ryan Oakes y Marcus von der Hofen (Raúl Bracamontes, Editor de Traducción)
Han sido unos años salvajes en la industria de las piscinas, con un crecimiento en algunas áreas de la industria estimado en más del 500% y desafor- tunadamente no todo es bueno. La pandemia por el COVID 19 atrajo a cientos de miles de clientes de piscinas, y en la primavera aparecían nuevos constructores de piscinas como conejos.
New Column, “Shotcreter Spotlight,” to Celebrate Nozzlemen and Crews, Support Staff, and Women in Shotcrete
By: Cindy Spires, Managing Editor
The editorial staff at Shotcrete magazine have created a new column entitled “Shotcreter Spotlight.” Its purpose is to shine a spotlight on the nozzlemen and teams who prep, shoot, sculpt, and finish the everyday jobs, the award-winning jobs, and everything in between. This new column also serves to spotlight those who work away from the nozzle as support staff and to specifically spotlight the women who make the industry thrive.
Mount Pleasant Station, Part 1: Preconstruction Qualification for Shotcreting of Mass Concrete
By: Shaun Radomski; Dudley R. (Rusty) Morgan, Ph.D., F.ACI; Lloyd Keller, F.ACI; Daniel Sanchez; & Laura Di Monte
Multi-million-dollar underground stations are currently under construction on Metro and LRT lines in Toronto, Ontario, Canada. Traditionally, the thick, heavily reinforced structural concrete station walls have been constructed using the conventional form-and-pour concrete construction method. This construction method, while widely used, is not without its challenges.
ASA Pool Shotcrete Contractor’s Qualification Program
By: Ryan Oakes & Marcus von der Hofen
It’s been a wild few years in the pool industry with growth in some areas of the industry estimated to be up over 500%, and it’s not all good unfortunately. The COVID Pandemic brought pool buyers out by the hundreds of thousands, and new pool builders were popping up like baby rabbits in the Spring. The pre-pandemic market had a poor balance of shotcrete contractors to pool builders with there being slightly more demand for shotcrete contractors than supply.
Coastal Gunite Construction Company Celebrates 40 years in Business
Coastal Gunite Construction Company delivers shotcrete construction services to build, maintain and rehabilitate concrete structures. Founded in 1983, Coastal Gunite Construction Company has developed a reputation for quality, integrity, and meeting strict performance requirements for both large and small projects. Their specialized experience in structural shotcrete construction allows them to provide owners and project engineers with cost-effective and enduring solutions to concrete infrastructure construction and maintenance needs