If you ever made repairs, you definitely faced such a problem as leveling and plastering walls. It is almost impossible to do without these procedures. Modern building materials help to cope with any problem. I would like to pay special attention to such a mixture as cement-sand plaster. Gradually, it fades into the background, but we begin to forget that it has a lot of advantages.
Features
There are a large number of cement mortars. All of them are good in their own way and have their own versatility. Of all the cement-sand plaster is the most popular. This solution has the following advantages:
- Universal mix. Suitable for finishing damp rooms, such as bathrooms. It is ideal for balconies and even building facades.
- Different from all other solutionsspecial strength and wear resistance.
- Suitable for plastering non-heated walls.
Specifications
Cement-sand plaster has the following characteristics:
- grey color;
- you can overwrite a plastered wall in a day;
- cement is a binder product;
- mixture consumption per 1 square meter about 18 kg (layer thickness 10 cm);
- Cement-sand wall frost resistance is 50 degrees Fahrenheit;
- surface will be solid after about 30 days;
- Operating temperature from -50 to +70 degrees.
Composition
Surely, when buying, everyone thought about what the dry mix is made of. Consider the composition of cement-sand plaster and find out what secrets it hides. So, everything is pretty simple:
- The main component of the mortar is cement. It can be of any brand from M150 to M500. For those who do not know, the number in the name of the cement indicates how much pressure in kilograms the finished mortar can withstand per 1 cm3. Cement with a low number is recommended for interior decoration, but a high-value option can be used for plastering facades.
- The filler is sand. It can be river or quarry. The strength and reliability of the plaster depends on the quality of the sand. A standard cement-sand mixture is prepared from a 1:3 ratio. This ratio may vary depending on which solution isstrength needed.
- Sand, which is used in the preparation of the finished mixture, must be coarse.
These were the main components, without which it is impossible to obtain a cement-sand mixture. Also, some manufacturers introduce additional components into the composition, for example, a copolymer or redispersible powders. Additives allow you to increase some quality characteristics, namely:
- strength;
- elasticity;
- flexibility;
- load resistance;
- adhesion;
- frost resistance;
- wear resistance.
This seemingly simple composition makes the plaster universal and indispensable.
Views
Cement-sand plaster is not as simple as it seems at first glance. The solution is divided into several varieties. Consider them:
- A simple mix. Designed for interior decoration, where smooth walls are not needed. Work with such a solution takes place in two stages: spraying and soil. No need to install beacons on the walls. Mainly used for sealing cracks and holes. With this solution, you can carry out hygienic treatment of walls.
- Improved blend. This type can be used for plastering indoor walls, as well as building facades. Work with the solution takes place in three stages: spraying, soil, coating. With proper work, it is possible to get a flat surface with the right angle.
- High quality blend. Use a solutionfor finishing any internal premises and any facades. The work is carried out in several stages: spraying, several layers of soil and covering, which must be ironed with cement. Lighthouses must be mounted on the walls. You should have at least 5 layers of plaster in total.
Having de alt with all the varieties of plaster, you can move on to the next question.
Expense
You need to buy a universal mortar that you can work comfortably with, choose a mixture such as cement-sand plaster. Consumption is an important factor that worries many. Calculating the correct amount is easy. Consider a few nuances:
- Before preparing the solution, carefully read the instructions on the package. Follow exactly all the manufacturer's instructions and you will get a quality solution.
- If you are preparing a cement-sand mixture yourself, then you must decide on the thickness of the finish. Here is an approximate calculation for you: if you need to get a thickness of 1 cm, then for 1 sq. m need about 8.5 kg of dry mortar.
- If you need to prepare a sand-cement mixture for the facade, then the optimal ratio of all components is 2:8:1 (cement, sand, water).
- It is necessary to take into account one more indicator, namely the level of surface deviation. It is measured in at least three places. All indicators are necessarily summed up, and then the total is divided by the number of all terms.
- Experts recommend to the total volume of the solutionadd 10% for all kinds of contingencies.
Cement-sand plaster is easy to prepare. You can either find the proportions on the package or calculate it yourself.
Exterior trim
Separately, I would like to talk about facade work. For them, you need to carefully choose a solution that must withstand temperature changes, as well as differ in frost and moisture resistance. Cement-sand plaster for outdoor use on the following surfaces:
- aerated concrete;
- concrete and reinforced concrete;
- brick;
- cement plaster;
- tree (here you first need to fix the iron mesh).
It can be applied in two ways: manual and mechanized. After plastering, the following coating is possible:
- ceramic tiles;
- decorative plaster;
- Finish putty.
When working with this solution, consider the following specifications:
- you can work with the mixture at a temperature of 5 to 30 degrees;
- it is not recommended to apply a layer thicker than 40 mm in one approach;
- remember that when working with the solution on the street, its pot life is up to 6 hours.
Advice for beginners! If you want to plaster the facade in frost, then choose a mixture that is adapted to work at low temperatures.
Facade cement-sand plaster should be grade M300 - M500. You will get a reliable and durablesurface.
Wall preparation
Modern construction uses different materials. This should be taken into account when preparing the wall for plastering. Since the materials are different, the preparation will be appropriate. Consider some features:
- Brick. Be sure to carry out the lathing of the walls. After that, it is necessary to treat the surface with a layer of glue and fix the metal mesh over the entire surface.
- Tree. Installation of lathing from shingles or slats. But you can save. To do this, treat the surface with a primer and apply a metal mesh.
- Concrete. There is nothing complicated here either. It is enough to treat the surface with a primer. Apply a thin layer of glue and install a metal mesh for plastering.
- Experimental materials. Be sure to prime the surface. Pre-plaster with a cement-sand mortar. We install a metal mesh and carry out a finishing coating with a solution.
Now you know how to properly prepare the walls. It is important to familiarize yourself with the tools for the job.
Inventory
To make work a joy, prepare the following tools for your convenience:
- plaster ladle;
- trowel, spatula;
- ironing iron;
- grater;
- level;
- trowel;
- locksmith's hammer;
- pulverizer;
- level;
- rule.
Cement-sand plaster is applied using a ladle. You may not succeed the first time, but over time you can learn everything. You can throw the finished solution using a trowel. For quick and high-quality mixing of the mortar, use a construction mixer. It will help create a mixture of a homogeneous consistency without lumps.
Final stage
When the cement-sand plaster of the walls is applied in accordance with all the rules, you can proceed to the finishing work. They are in the grout. The procedure is carried out when the entire solution is dry. To do this, do the following:
- we dilute the liquid solution from the dry mixture;
- put it on the wall;
- grind with half a trowel.
The surface will be even and smooth.
Expert Tips
- If you prepare the plaster yourself, then use PVA glue as a plasticizer.
- For spraying, add tile adhesive to the solution. It will increase adhesion to the surface.
- If you buy a ready-made dry mix, then carefully study the date of manufacture and packaging.
- Before preparing the solution, carefully read the instructions that are on each package.
In conclusion
Based on the foregoing, we can safely say that cement-sand plaster is considered the most versatile among all other representatives of its class of materials. Feel free to use it for grouting interior and exterior walls. Especially plaster is good for sealing walls in cellars, garages and sheds. Yes, and its cost will please you.
