Sand and gravel mix: characteristics

The sand-macadam mixture, which is known by the abbreviation PSP, consists of 50 percent of screening and the same amount of crushed stone. The content of the last ingredient or gravel must be at least 15% of the total mass. This material is obtained as a result of crushing limestone, here it is possible to include its natural variety.

general description

The sand-macadam mixture has excellent drainage characteristics and relatively low cost. These two factors make the material quite popular in repair and construction. It is excellent for compacting layers when performing road works. The composition is indispensable for the construction of concrete, asphalt and other sites. It becomes part of the crane tracks. Everywhere the composition is used in the balancing of railway embankments, as well as in the manufacture of asphalt concrete mixtures.

PSP classification

The sand-macadam mixture can be enriched or natural, the first of which is obtained by the method of natural enrichment. Among other things, we can distinguish some groups of materials, among them C2, which implies fractionality within 20 millimeters. If it is a question of composition under the abbreviation C4 or C5, then you have a fraction up to 80 millimeters. The designation C6 also indicates fractionality from 0 to 40 millimeters. On sale it is possible to meet and С12, that means inclusions up to 10 millimeters. Depending on the purpose, the mixture can refer to the following types: for covering roads and base of airfields, for ballasting railroad embankments and for making asphalt mixtures.

Use of rubble-sand

The sand-macadam mixture, depending on the field of application, has certain qualitative characteristics. Thus, rubble-sand, used for motorways and airfields, is capable of imparting the required strength to the coating or the base. Among other things, it is used to strengthen roadside roadsides. Sand, which is used for ballasting of embankments, is used in the organization of railroads of various patency and intensity of cargo traffic, which distinguishes the second placeholder from the previous one in that it is intended for general purposes. When it is produced, the technology of crushing serpentinite is realized. Particles obtained as a result, in size should not exceed 25 millimeters.

Crushed stone-sand mixture (GOST 9128-97, which must be observed at manufacturing) can be used for asphalt mixes and is a material that is obtained in the process of rock crushing. The composition is used as a mineral component of the mixture being created. Particles can vary in size from 1 to 20 millimeters.

Key Qualitative Advantages

Crushed-sand mixture C4 is often compared with a clean crushed stone. The latter loses in a variety of indicators. Among them there is a need to allocate lower cost, superior sealing quality, and also a fairly simple technique of use. In view of the fact that the described mixture has sand, gravel and gravel in the composition, the final properties of the mixtures are affected by the characteristics of the three components at once. Of particular importance is the strength of rubble, the maximum value of which is M1400. This parameter refers small stone to high-strength materials. It is impossible not to distinguish frost resistance, which has ready-made sand-gravel mixes. All their brands can be purchased in the building materials market. The most common is PKS with the F300 marking. The content of pulverized and clay particles can reach 20%, this parameter should be taken into account when purchasing the material.

Conclusion

The sand-macadam mixture has many positive characteristics, most of them were listed in the article. If you decide to use the described composition for the construction, you must first acquaint yourself with the prices. The average cost on building materials bases today is about 400 rubles per cubic meter, which can be called an affordable price that any future owner of a private house can afford. And this is one more advantage of the material described.