Sand-gravel mixture

A loose substance based on equal parts of screening and crushed stone is called a sand-crushed stone mixture and is widely used to solve various construction tasks. In a well-formed natural material, crushed stone or gravel should make up at least 15% of the total mass of the mixture. Crushed particles of limestone sedimentary rocks or rocky rocks act as the basis for SHPS.

The absolute advantages of the sand-gravel mixture include low cost and excellent drainage qualities. That is why this building material has become very popular and in demand at almost any construction site. With the help of TPS, layers are prepared and compacted for road work, sites with concrete and asphalt surfaces are equipped, and the basis for crane tracks is created. Everyone is familiar with the extensive deposits of crushed stone on the railway. The main task of the sand-gravel mixture in this use is the ballasting of railway tracks. The use of SCHPS as an important component of asphalt concrete mixtures deserves special mention.


The sand-gravel mixture may contain an increased amount of crushed stone and gravel. If the specific gravity of large fractions in the mixture reaches 70%, it becomes enriched, and with an increase in the content of crushed stone to 95%, it becomes natural.

There is also a classification of mixtures by fraction size, using markings from C1 to C13. Consider the most popular fraction sizes.:

C2 – fraction size up to 20 mm;
C4, C5 – up to 80 mm;
C6 – up to 40 mm.
C12 is the size of inclusions up to 10 mm.

Based on practical application experience and obtaining the best operational results, the sand-gravel mixture is divided into the following types::

for covering highways and the foundation of airfields;
for ballasting railway embankments;
for the preparation of asphalt concrete mixtures.
The sand-gravel mixture marked C4 is close in its characteristics to pure crushed stone, but at the same time has a significant advantage in cost, compaction quality and ease of use.

The main feature of multifunctional control panels is the content of components with different physico-chemical characteristics in their structure. The final performance properties of the mixture depend on which components are used. The strength qualities of the crushed stone-sand building material depend on the brand of crushed stone, the maximum strength of which is M1400. It is thanks to such crushed stone that the granular bulk mixture turns into a high-strength, durable material.

It is worth remembering about the excellent frost resistance of SHCHPS, which can withstand a large number of cycles of freezing and thawing. There are many variations, but the most popular are gravel-sand mixtures labeled F300 (300 cycles).

The pulverized and clay particles contained in it, which can make up up to 20% of the volume of the mixture, have a negative impact on the quality of the material. When choosing a sensor, be sure to pay attention to this parameter.

Fractions C1, C4, C5, C6, C13, 0-40, etc. are used in the following construction works:

preparation of technical bases for road surfaces of all types and creation of roadsides;
formation of parking coverings for motor vehicles and airfield sites.
crushed stone-sand mixtures are used in the manufacture of materials for priming concrete.