Can you shotcrete yourself?
DIY shotcrete is achievable for a hobbyist, owner/builder or a contractor. It is all about the speed of delivery you want to accomplish. Before getting started, decide if you want to spray ready mix or site batched shotcrete.
What is a shotcrete machine?
Shotcrete equipment allows for the projection of a concrete mixture at high pressure. Shotcrete equipment includes a mixer, an additive pump, compressor, sprayer arm and control system, and is usually found on a motorized chassis. This equipment is used in trenchless installation.
What is shotcrete and what are the two methods of shotcreting?
The two basic methods for applying shotcrete are the dry-mix process and the wet-mix process. The term gunite is frequently used when referring to the dry-mix method; other terms such as air-placed concrete, gunned concrete and sprayed concrete have also been used in the past to describe the process.
Is shotcrete more expensive than gunite?
Gunite generally allows builders to take more time to complete the project properly, since they can stop and start as needed. Gunite tends to be less expensive than shotcrete, and it can result in fewer errors in the construction process.
Is shotcrete cheaper 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.
How thin can shotcrete be applied?
Depending on the application 1/4 flash coat to 1 inch thickness can be the minimum. As far as shotcrete up to the steel windows, you have to consider that cracking may occur off of each corner. This can be minimized by adding additional reinforcement at those locations.
How long does shotcrete take 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).