There are no minor in the importance of details. Materials, and a clear project, and professionalism are important. What is curious, this thesis applies to a simple building sand. In general, the sand is a key material for the construction segment. The integrity of the structure depends on its competent choice.
The composition of the sand differs depending on the labeling. The main components of building materials are quartz, mica and field spat. These components are in all types of sand.
What could be sand?
For construction purposes, the sands of the following types are used:
- career;
- river.
Does not find use in construction:
- nautical;
- quartz;
- mountain.
The sand is classified by particle size on:
- dustless;
- coarse;
- clayey.
Contrary to the problem, it is impossible to use low-quality sand in the manufacture of a solution. The quality of concrete will suffer in this case, which will affect the reliability of the design and aesthetic perception. And you can win in this situation by choosing high-quality sand. That paradoxically, cement in combination with such a product is required relatively smaller. Incidentally, the cost of concrete will be lower.
To visually assess the quality of the building sand and make the right choice, we suggest familiarizing yourself with this question.
How to choose sand
Any expert in the field of construction will certainly indicate that concrete strength depends on the selection of sand. Cement also plays an important role, however, the sand is a structure-forming agent.
Thus, using one grade of cement and the same proportions of the preparation of a solution with sand of different types can be obtained somewhat different according to the characteristics of the compositions. The high content of the clay impurity is guaranteed to reduce the strength and frost resistance of the concrete. Clay, enveloping sand particle, acts as an inhibitor of a high-quality clutch of the solution. In this way, you can confidently declare: clay sand for the preparation of reliable frost-resistant concrete is not suitable.
The most suitable option is washed sand. The percentage of clay in its composition is minimized. However, this type of material is 30% more expensive due to the mandatory additional processing.
River sand is an optimal solution. This material is identical to the module, differs by homogeneous graininess, high quality. Having conceived large-scale construction, it is advisable to give preference to this particular option. Due to the natural origin, the river sand does not find foreign mixtures of an organic or clay character. For technical specifications, this is the perfect product for building housing.
How to effectively approach the selection of sand
However, in some cases, the use of river sand can be considered irrational. If the requirements for the strength of a concrete solution are low, and the designs are not subjected to high mechanical and natural loads, it is cost-effective to choose the career sand construction. You can buy sinding sandary sand at the following construction work:
- bricklaying;
- plaster;
- filling the foundation.
The price of material depends on the characteristics, as well as from the remote career from the sales market. The most affordable is the career sand. It is mined in grand careers. The product includes large and small clay particles, dust.
After industrial processing, quality, exactly as cost, increases. For example, a seeded product can cost two times more expensive. The price variation is explained by the expenditures for sifting and filtering a large amount of clay.
The washed construction sand, which is obtained by flushing a seeded product, is already three times more expensive than natural raw materials.
The recommendation of specialists: To obtain high performance of the cement-sand solution, it is necessary to choose the sand of the first, second classes. Such material is used when installing reinforced concrete and concrete structures of increased strength.
How to determine the quality of sand
Specialists say that you can visually and tactically check the quality of the building sand.
1) a visual way.
The material class is determined according to the size of the fractions and the presence of additional components and impurities. To do this, you will need a compact sieve with cells of different sizes - from 0.16 mm to 0.5 mm. Asking a small handful of sand, you can define a class and type. In the event that large clay particles remain, it is the cheapest career sand.
2) Tactile method.
Class and type is determined by compressing sand in the palm. If the product turns into a dense lump, you have clay sand. No admonition of the seller about wet sand in this case will not have forces. Even wet sand rolls out of a compressed fist.
3) Mixing with water.
To identify the sand grade, you will need a transparent packag. A plastic bottle is quite suitable. So the experiment is as follows:
- bottle poured clean water;
- a small handful of sand is poured into a bottle;
- capacity is shaking and left out of 24 hours.
If the sand is high quality, water does not significantly climb, directly all particles will remain at the bottom. If the sand was not subjected to processing, there will be a muddy dirty water in the bottle.
Sand for children
In addition to creating figs in the sandbox, children can use natural material as a raw material for the modeling of figures. On the market you can find such an interesting product like live sand. You can buy universal material for the development of children from recently.
This is a peculiar replacement game in the sandbox, and accessible at any time of the year. The material is pleasant to the touch, does not leave scratches on the skin. There are practically no clay. It includes:
- small river sand;
- carnish particles;
- oil.
Live sand is so plastic, which allows you to sculpt the figures, as if from plasticine. In the process of creative leisure you can pour out the material in the open container and create. It does not need moisture and additional means of protection due to viscosity. That is, the vacuuming floor after classes do not have to.
Despite the presence of organic oils, the living sand does not leave stains on clothes, wash off his hands with simple water. Another important fact: fungi and bacteria do not multiply in the sand. But it is required to store it in open packaging.
Conclusion
So, you figured out that the strength and certain characteristics of concrete depends on the selection of sand. To obtain a frost-resistant durable composition, it is necessary to use the sand of the first class. This washed clean sand without impurities.
In cases where concrete strength is not a prerequisite, it is costly beneficial to add simple career sand. It is used in plaster, brick laying, fill the foundation.
Determine the product quality can be visually and tactile. Satch the sand on a large sieve. If clay particles and stones remained, you are the cheapest material. Squeeze the sand into the fist. If a sticky lump turned out, a lot of clay.
Finally, for children there are lively sand - a universal means for modeling figures and structures.
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