Spray on Concrete Driveways Described For Homeowners
The majority of homeowners today have no idea what a spray on concrete driveway is and many of its qualities. Here, we get an idea of its definition and advantages. A resurfaced concrete driveway is a cement mixture and often mortar installed by shooting the concrete through a hose using an air compressor to project it at very fast speeds onto any solid surface, in this case a driveway. Spray on concrete is actually a term used to describe all form of concrete resurfacing applications and gunite is a word often used to name the dry-mix variety of concrete resurfacing types.
A spray concrete driveway undergoes placement and compaction simultaneously because of the force with which it is shot through the nozzle of the sprayer or concrete gun. This can be used and sprayed onto any kind or shape or solid surface which also includes vertical faces or overhead surfaces like ceilings, apart from the usual flat work like driveways and patios.
Some History on Spray Concrete Driveways
Spray concrete driveways or shotcrete driveways, originally was called gunite, and, as mentioned before, was developed in the early part of the 20th century by the U.S. resident and taxidermist Carl Akeley. He used spray on concrete to fill in plaster molds of dead animals as was his profession. He utilized the technique of blowing dry material through a hose using compressed air, adding water with a separate hose attachment as it was discharged.
The resulting material was used as patching on weak or damaged parts in existing structures. And, as discussed before in the article, In 1911, his patent for his inventions was approved, the “cement gun”, which was what he called the equipment, and also coining the term “gunite”, which was the material produced by the invention.
As stated here, it was the sole method until the 50s when the wet method was invented and it has other applications. By the 60s, this other option for gunning using the dry method was developed with the invention of a rotary gun, which had an open hopper and could be fed concrete mixture nonstop. Spray on concrete is also a viable means and technique for spraying on structural concrete on buildings for support.
This operation requires a nozzle operator who will control the nozzle which shoots out the concrete to the solid surfaces. This nozzle is operated manually on small projects, for instance in the building of a small swimming pool or backyard patio. With bigger jobs the nozzle can often be affixed onto mechanical arms where the nozzleman manages the operation by a hand-held remote control device or one which is wired to ensure continuous control.
In using either form, dry or wet, contractors use steel rods or webs of steel mesh to help retain and reinforce the surface which is getting the concrete resurfacing treatment. Installers need to provide an extra surface for the concrete to stick onto as it cures in place, the spray on patches or surfaces are more durable and have permanence.
Additional Background On Spray On Concrete Driveways
Application of spray concrete for driveways has been utilized for almost one hundred years now, also done for swimming pools and for building retaining walls. Due to its being flexible when applying over intricate surfaces, it is also widely being used in creating simulated natural objects and environments like the rock-landscapes in zoo exhibits, and decorative water features in small gardens. For some parts of the country wherein pool-construction is widespread specifically in Florida or California, spray on concrete has also been widely popular as spray concrete driveways.
Spray on concrete or “shotcrete” has been divided either by a wet procedure or a dry process. A dry process is a mixture of dry cement and aggregate which are operated through an applicator hose, with just water added at the nozzle. For a wet-mix process, this is where the concrete is mixed already before being loaded into a hopper, from which it is pumped through the delivery hose and spray with compressed air added at the nozzle through a separate hose, effectively shooting the material out and making the installation of a spray concrete driveway a breeze.