When do I need machine plaster?
Imagine the situation - the house is built( let it be your country cottage of aerated concrete), but the season when it is possible to carry out external plastering works is nearing its end, and you would like to finish the construction this year. It is clear that manually you will finish the walls for more than a week, and leaving the walls unprotected from dampness for autumn and winter, as well as part of the spring, is fraught.
There are only two possibilities: either to invite specialists with a plaster station, or to rent a small unit himself. Both options will reduce the time of covering the walls with a solution at least 2 times, but the hand-made finish will also save you a certain amount of finance.
So, plaster with the help of special devices becomes necessary when the deadlines are tight, this applies to both private low-rise construction, and erection of multi-apartment buildings and other objects with medium and large volumes.
Also this method of finishing is applied in those cases when plastering works to be performed manually inefficiently( how many people and labor costs will be required to process, for example, a factory complex).For you, plastering by machine is convenient if your employment does not allow you to devote much time to finishing work, and also if you work in proud solitude.
What does the plastering of walls?
As the size of the objects for decoration can be very different( the vaults of the subway tunnel and the corridor in the cottage), the power of the units is also required different. Aggregates of high power are called plaster stations and are both stationary type and mobile( car-based, trailer).
Comprises such a machine from the supercharger, whose operation is based on the pneumatic( piston), screw or diaphragm pump, as well as from the solution and the nozzle, which in turn can be pneumatic or mechanical. However, pumping stations can only interest you in part, since you are unlikely to buy or lease a unit with production of more than 4 cubic meters per hour.
Cement plaster mortar, which differs little from the standard concrete composition, can be applied with a special gunning device( gunning concrete), which gives an ideal evenness of the walls and high quality of the finishing layer.
Small-sized plastering units on the wheel run are much more suitable for low-rise construction, they are made in the form of a small cart with muscular traction. Such automation is a continuous or cyclic action and its performance is just within the required 1 cubic meter per hour.
The mobility of formulations applied with the help of small aggregates should be within 7-10 centimeters, depending on the brand of the supercharger. Wall plastering with a small aggregate is possible within the limits of their height with low power of the pump, while the pumping stations can supply the solution to a height of several floors.
Plastering machine application with one hand movement
Plaster by machine is not more difficult than shooting in a dash, even easier, more like watering a flower bed from a water hose. The main thing is to properly hold the nozzle, which serves to crush the jet of solution into separate small particles when it passes through the nozzle-tip. Earlier it was said about the injectors of pneumatic and mechanical action, and so, the first are designed for mixtures with a mobility of at least 7 centimeters.
Nozzles with mechanical feeding of the mixture require greater mobility, from 9 centimeters. They can have an adjustable or unregulated nozzle slot. The adjustable version is more convenient, since it is possible to vary the intensity of the solution supply by a simple mechanism from a nut moving along the thread along the nozzle body and two movable plates compressing the rubber nozzle under the pressure of the nut.
The mobility of the building or finishing mixture is calculated by self-immersion in a solution of a metal cone weighing 300 grams and with a peak angle of 30 degrees at a height of 15 centimeters.
But whichever spray nozzle you had, and whichever you prefer the unit, the plastering of the machine application should be done using a certain technique, which is easy to learn. It is enough to know that the smaller the angle between the nozzle and the surface being treated, the more spraying of the solution flying off the wall with a "ricochet".
The most optimal way to get a smooth wall is to keep the nozzle at an angle of 90 degrees to the wall. Small sprays, which still can remain on the surface, can either be brushed off with a special plastering trowel after drying, or immediately rubbed into the surface.
Some are fond of shooting repair with the help of special cameras, put on a construction helmet. But, I must say, the entire process of how the plastering of walls is formed, the camera can not capture because of the high intensity of the solution, but the result may well be photographed for home newsreels.
