Construction companies perform many types of work. It is necessary to properly organize the removal of lobny garbage, as well as measures to build the foundation, walls, decorative paths and so on. One of the most important elements of any construction is crushed stone. But before acquiring this natural material, it is necessary to understand its features.
Adhesion
This characteristic indicates the degree of adhesion of bitumen materials with the surface of the stone. The strength of the future building depends on adhesion. The highest rates have crushed stone, the surface of which has dark gray shades.
Grain composition
Choosing crushed stone, like other settlements, pays attention to the grain composition. In the total number of grains with dimensions of less than 2 cm, there should not be more than 10 % of the total, and large particles of more than 5 cm should be less than 0.5 %.
Frost resistance
It depends on this indicator how many pore changes can withstand the material before the destruction. Data is obtained by laboratory research. For the construction of buildings, it is necessary to choose a brand of crushed stone with an indicator of F300 and above.
Strength
Since crushed stone is used in the construction of the road surface, special requirements are imposed on its strength. This indicator is checked using special cylinders, where a mechanical effect is on the stone. Natural material is divided into several types of strength.
Flying
The parameter that indicates the amount of needle and lamellar grains in the total mass of the material. The fewer such grains, the higher the quality of the material.
Radioactivity
When purchasing crushed stone, it is necessary to pay attention to the data of the radioactivity specified in the certificates.