Is shotcrete more expensive than concrete?
In addition, shotcrete — while less expensive than poured concrete — is more expensive than gunite. Finally, shotcrete takes a significant amount of time as compared to poured concrete, making it a less than ideal choice for large foundations, structural piers or other large projects.
Is shotcrete more expensive than gunite?
Cost. Because of the relatively simple construction process, gunite pools are generally noticeably cheaper than shotcrete or typical concrete pools.
How much shotcrete is needed for a pool?
2,500 psi shotcrete
In California, building officials typically mandate 2,500 psi shotcrete for pools. Some experts believe this requirement comes from codes regarding retaining walls and foundations.
Who invented shotcrete?
taxidermist Carl Akeley
Shotcrete, then known as gunite, was invented in 1907 by American taxidermist Carl Akeley to repair the crumbling façade of the Field Columbian Museum in Chicago (the old Palace of Fine Arts from the World’s Columbian Exposition).
Is shotcrete better than concrete?
For waterproofing performance, conventional CIP concrete is more reliable than shotcrete, and has proven so through decades of successful installations. Shotcrete is popular because it’s less expensive to install. However, its use has resulted in higher incidences of water ingress in below-grade foundations.
Can you shotcrete over concrete?
Shotcrete can be either wet-mix or dry-mix concrete, as long as it’s shot out of a hose, Shot concrete.
How long does a shotcrete pool last?
On average, gunite swimming pools last 7 to 10 years before they need to be resurfaced. When that time comes, it’s important to know what options are available so that you can pick the best choice for your backyard space.
Does shotcrete need to be sealed?
While the shotcrete fully encapsulates piping, light niches, and other penetrations, a certain amount of separation around these penetrations is inevitable. Therefore, all penetrations through the shotcrete need to be sealed or plugged.
How long does it take for shotcrete to cure?
Concrete, when applied using the shotcrete process, or cast-in-place, needs to cure for 7 days. Water is the best curing method (7 continuous days).
Do you have to water shotcrete?
Shotcrete / concrete is ready for water as soon as the initial set is complete, which is about 4-6 hrs after placement. Water is applied to aid in hydration/curing, a process which decays exponentially, so watering is most critical in the first hours/days after placement.
How long does it take to shotcrete a pool?
While there’s no clear-cut answer because a lot of the process varies for reasons such as weather or the size of the project, in general, you can expect an average of eight to 12 weeks to have your shotcrete pool built.
How long does it take to apply shotcrete?
As a general rule, without the use of retardant admixtures, you have 90 minutes in the wet-mix process from the time the material is mixed to when it’s applied.
Is shotcrete as strong as concrete?
The ability to build in very tight spaces and “free form” applications make it very simple to build pools of any shape. Higher compressive strengths than cast-in-place concrete. Typical compressive strengths of shotcrete are in the 6,000 to 7,500 psi range. Lower construction costs.
Do you need to waterproof a concrete pool?
Waterproofing swimming pools is a critical component of the construction works required when building a pool. Historically, the trade of “waterproofing” didn’t exist. Certainly within the swimming pool industry, no specific specialised trades were ever employed to waterproof the structure of the pool.
What is shotshotcrete?
Shotcrete, typically referred to as Gunite, is a specialty type of wet mix concrete, with the biggest difference, in comparison to traditional concrete, is the placement method.
How much does a shotcrete pool shell job cost?
This quote should include the delivery, shooting and forming. For example, a forum member on this PoolSpaForum.com forum thread noted he was a contractor in South Carolina who worked with shotcrete, and according to his response, he said most of his pool shell jobs, when using shotcrete, would be about $65 to $85 per yard.
Did George Akeley use spray concrete in his taxidermy work?
Akeley did not use sprayable concrete in his taxidermy work, as is sometimes suggested. Akeley also invented a highly mobile motion picture camera for capturing wildlife, started a company to manufacture it, and patented it in 1915.
When did they start calling it shotcrete?
In the 1930s, the term shotcrete started to arise; hower, it was often used improperly to determine the difference between the wet-mix or dry-mix method. By the 1950s, the term “shotcrete” become the official generic term of the sprayed concrete process, whether being dry or wet.