Frequently Asked Questions
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At United Shotcrete, we help our customers get the answers they need to their questions to make an informed decision about choosing the right application and completing their project with professional results. 

Below is a list of frequently asked questions about sprayed concrete solutions. If you don’t find what you are looking for, feel free to contact us. We’ll be happy to discuss the details of shotcrete and get you started with your project.

United Shotcrete contractors are  American Concrete Institute (ACI) certified shotcrete nozzleman. We carefully vet every contractor we hire to ensure they have the training and certification necessary to perform any residential or commercial shotcrete job.

Shotcrete is concrete. The difference between shotcrete vs. cast-in-place is in the application.

Shotcrete applications use a nozzle to project concrete at a high velocity on a horizontal, vertical or overhead surface. The result is a much stronger bond of concrete with a substrate that lasts for years.

In the shotcrete method, the applicator uses either a dry-mix or a wet-mix. The difference between these two methods is that the dry-mix, otherwise known as gunite, adds water through the nozzle, while the wet-mix adds water to the mixture before it reaches the delivery hose. 

The cast-in-place concrete method – also called the poured-in-place concrete method – is a method that involves pouring the concrete mixture onto the required place. It is a technique taken in situ or the concrete component’s position. The concrete is transported to the desired place using a concrete mixing truck that puts the concrete into the desired location or the dumper.

A shotcrete mixture exceeds the compressive strength of most mixtures used for placed walls because the application of shotcrete requires a much lower water-cementitious material ratio than commonly found in wall mixtures.

We service most of the Mid-Atlantic and the North of the United States, including these and other states.

  • Maryland
  • Virginia
  • West Virginia
  • Philadelphia
  • New York
  • New Jersey
  • Washington, DC.
  • Pennsylvania
  • Delaware

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Every concrete application method results in a certain amount of waste. However, compared to gunite or cast-in-place applications, the amount of waste is much lower. Experts suggest that the waste generated by the shotcrete method is six to ten percent. By comparison, gunite waste is approximately 20 percent. The cast-in-place method can create up to 25 percent of waste.

Shotcrete waste consists of rebound and excess cutting/shaping of the plastic concrete. As long as shotcrete waste is within industry-accepted parameters, it is a part of the shotcrete process, not a detriment to it.

Some of the most common applications for shotcrete include

  • Ground Support
  • Swimming Pools
  • Skate Parks
  • Refractory
  • Domes
  • Architecture & Landscaping
  • Repair Work
  • Restoration Work

Shotcrete doesn’t simply produce a gun / nozzle finish. It can be finished in almost any class, type, and tolerance. A wood float and sponge finish, broom, steel trowel, and even simulated rock finishes are all attainable. Concrete finishes should be incorporated into the specification and performed and approved as part of a mock-up prior to the start of a project.

The key to Shotcrete’s longevity is property care and maintenance. If you take care of the concrete surface, you can expect it to last more than 50 years.

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Yes. We often apply shotcrete to existing concrete structures to stabilize or reinforce the structure. Shotcrete is a practical and efficient means of prolonging the life of existing concrete structures. While it may not work in all situations, its flexibility and ease of application make it an attractive alternative to other means of rehabilitation.

The shotcrete process requires less formwork and can be more economical than conventionally placed concrete. Shotcrete is applied using a wet- or dry-mix process. The wet-mix shotcrete process mixes all ingredients, including water, before introduction into the delivery hose. The dry-mix process adds water to the mix at the nozzle. We use shotcrete in new construction and repairs, and it is suitable for curved and thin elements. 

The choice of shotcrete over other traditional methods is growing day by day as many have known its benefits. One of the biggest benefits is that shotcrete is highly flexible. You can use it to design and create any shape. Best of all, it does not lose resiliency regardless of what design you have in mind.

Contact Us For Your Shotcrete Project in the Mid-Atlantic Region

If you are looking for an innovative solution for your upcoming concrete project, contact United Shotcrete. We offer complete shotcrete solutions in the Mid-Atlantic Region. Fill out our contact form or call us to schedule a consultation.