Watershape University: Filling a Void

By: 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.

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Risk Management

By: 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.

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Why We Need a Design Code for Concrete Pools

By: 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.

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Cementing a Legacy: A Concrete Understanding of Municipal Skatepark Development

By: 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.

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Can Shotcrete be Affected by Alkali Silica Reaction?

By: 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.”

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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.

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New Column, “Shotcreter Spotlight,” to Celebrate Nozzlemen and Crews, Support Staff, and Women in Shotcrete

By: 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.

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Mount Pleasant Station, Part 1: Preconstruction Qualification for Shotcreting of Mass Concrete

By: 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.

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ASA Pool Shotcrete Contractor’s Qualification Program

By: 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.

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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

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High-Production, Quality Shotcrete

By: Bruce Russell

High-production shotcrete projects are amazing to observe; when operating at optimum level, it appears to be very simple. Those of us in the shotcrete industry know better; there are many well-trained people and detail-based processes required to make it all happen. The following is a brief layout of what it takes to operate as a high-production shotcrete contractor while producing the highest quality product

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Mapei’s London Underground Bank Station’s Capacity Upgrade

By: Enrico Dal Negro, Stefano Anzani, & Steven Price

Deep in the heart of London’s financial centre, work has been continuing to make one of the world’s largest stations safer and easier for passengers to use. Finding your way around the existing labyrinth of tunnels, connecting five London underground lines, is a task worthy of the most experienced navigator.

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Natural Fibers for Sustainability in Shotcrete Applications

By: Joe McJunkins, Jessica Silva Ph.D., & Jisha Hechel

The global construction industry consumes millions of tons of non-renewable resources every year. Conventional construction materials are known to be produced from sources that require an extremely high energy demand and, therefore, produce a large carbon footprint. The use of renewable, natural fiber resources plays a significant role in the development of eco-friendly building practices.

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Sobre Productividad, Cálculo de Costos de Trabajo y Éxito en el Shotcrete

By: Ryan Oakes

Como miembro de la Sociedad de Honor Internacional en Economía y con una doble licenciatura en Finanzas y Banca, ingresé al mundo del shotcrete preparado de manera un poco diferente que la mayoría de los que ingresan a esta industria. Eso fue hace más de 20 años, pero los principios de comprender el tiempo, el valor del dinero y los costos de oportunidad están indeleblemente grabados en mi psique. En la actualidad, junto con mi socio comercial, quien también proviene de un entorno de fabricación y negocios en un campo internacional, dirigimos una empresa de transporte, una empresa de concreto lanzado vía seca, una empresa de PebbleTec y una empresa de diseño, todo bajo un mismo techo.

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Advances in Shotcrete Technology for Ground Support in Tunnels and Mines in North America

By: Lihe (John) Zhang, Ph.D., P.Eng., F.ACI & Dudley (Rusty) Morgan, Ph.D., F.ACI

In recent years, shotcrete has been widely used for ground support in civil tunnels and mines in North America. Shotcrete technologies have advanced with robust robotic sprayers, high-performance shotcrete mixture designs, and high-performance fiber reinforcement in conjunction with rigorous qualification of shotcrete nozzlemen and QC inspection and testing programs. Design engineers and contractors are using shotcrete more and more often for various underground applications including ground support and final linings in tunnels in soft ground and hard rock mines, as well as in repair and rehabilitation projects in railway tunnels and other underground openings.

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On Productivity, Job Costing, and Successful Shotcreting

By: Ryan Oakes

As a member of the International Honor Society in Economics and with a double BS in Finance and Banking, I came into the world of shotcrete prepared a little differently than most entrants to the field. That was over 20 years ago, but the principles of understanding Time, the Value of Money, and Opportunity Costs are indelibly ingrained into my psyche.

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Enhancing Efficiency and Safety in Concrete Shaft Restoration: A Shotcrete Success Story

By: Jacqueline Ipema

In September 2021, American Concrete Restorations Inc. was contracted to perform 60 yd³ (46 m³) of concrete repairs to an existing shaft that is used to access an underground tunnel system in a southern suburb of Chicago, IL. The job was for the Metropolitan Water Reclamation District of Greater Chicago, Thornton Construction Shaft. The dimensions of the shaft are 250 ft (76 m) deep and 30 ft (9 m) in diameter, and the only access is from the top using a crane basket. The project specifications called for the use of a polymer-modified, bagged product using the formand-pour method to replace the old concrete.

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Framing Smartphone Photos for Shotcrete Jobs Using the Rule of Thirds

By: Cindy Spires

With the improvements in smartphone technology over the last decade, many of the phones we have in our hands are just as good at taking quality photos as some point-and-shoot cameras. In the absence of a professional photographer to follow us around and shoot pictures at our job sites, it turns out we have the next best thing in our pockets!

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Robust Contentment

By: Bill Drakeley

This beautiful project, nestled on the Connecticut shores of the Long Island Sound, required a careful balance of robust construction and design, and careful adherence to environmental codes protecting the adjacent oceanic rock formations and biologically sensitive tide pools. “It was a steep challenge,” explains Bill Drakeley, but he and his company welcomed the opportunity.

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The Jetcreter – The First Continuous-Feed, Dry-Mix Gun

By: Ted Sofis

The Jetcreter was the very first continuous-feed gunite machine. It was manufactured by Engineered Equipment, Inc. in Waterloo, IA.

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