About sand concrete it became known not so long ago, no more than 10 years ago. But now it is one of the most demanded building materials, and its production is engaged in many companies around the world. It is a powder mixture, which includes polymeric or mineral( binder, astringent) substance and various additives, fillers. Today we will talk about the characteristics of sand concrete and its advantages as a building material.
Sand concrete is also known as "dry mix M( 1500 - 300)".Widely used in both construction and repair, restoration work. In the private sector, the "M300" brand is most often used. From this material are made and concrete slabs.
It is diluted with water at the place of production just before use, turning into a thick solution. It is applied a small layer on the surface to be treated, after which it, filling all the irregularities, turns into a solid, even coating. Solutions are divided into light and heavy. The first have an average density of less than 1500 kg / m2, and the second - 1500.
Depending on the purpose, sand concrete is divided into several types: masonry, waterproofing and the like. If there is only one binding component in the mixture, then the solution on its basis is called simple. With several binders - mixed. An example of a mixed solution is concrete. It has 4 main components: cement, crushed stone, sand and water.
Advantages of the sand concrete
- for working with this material do not need any professional skills, no special equipment or tools:
- high speed of work;
- no construction debris and dirt;
- fast curing. You can walk on the treated surface after 2 days;
- considering that all components are carefully selected in a weight ratio, it is impossible to make a mistake when preparing a solution. This is often what happens if the concrete solution is done by hand;
- possibility of application both for internal, and for external works;
- plasticity;
- no natural shrinkage;
- is practically 100% water resistant.
In evaluating all the advantages of using sand concrete it should be noted that its cost is still higher than that of a conventional concrete solution. However, the price of a dry mix is quite acceptable and corresponds to the quality of the material. In addition, it is not applicable for "vertical" work( for example, plastering).
Characteristics of sand concrete
- fraction of sand - from 0 to 5 mm;
- water consumption - 0,15 l / kg;
- compressive strength( for M300) - 300 MPa;
- consumption of the mixture - about 20 kg / m2( with a laying layer of 1 cm);
- full serviceability - after 4 weeks;
- the time of application of the prepared solution does not exceed 2 h( at +20 degrees).
It remains to add that sand concrete can be used at any stage of construction: the foundation of the foundation, the erection of walls, the pouring of screeds on the floors, the surface finish. This material is suitable for use regardless of how further processed surface is processed. Sold in packs of 40 kg.
