The very first step should always be an analysis of the quarry, and especially the characteristics of the raw material. Of prime importance is the hardness of the material to be crushed. To describe this property the compressive strength, the Los Angeles Index or the Mohs Hardness should be determined and a point load test should be carried out.

The characteristics of raw materials for the concrete production differ at a wide range. The limestone deposits used today as base materials, show very different properties regarding hardness, abrasiveness and stickiness. To optimize the crushing process as well as the investment and operating costs, different types of crushers are available.

The silica content is an important issue to be considered before using crushers for concrete industry. Due to the high speed of the rotors, the crushing tools are vulnerable to wear. Before making a final decision, the abrasiveness of the raw material has to be analyzed very carefully to avoid suffering from high maintenance costs. If the silica content is above mentioned values, a crushing system with a small speed difference between the material to be crushed and the crushing tools should be used.

In the selection of equipment types and specifications something followed should be paid attention:
1. The equipment types and specifications should meet the requirements of production capacity and adapt the process conditions, the work environment.
2. The efficiency of equipment. The efficiency of equipment is composed of a series of technical parameters. In the selection of equipment, the efficiency of equipment must adapt your own production technology parameter.
3. Reliability of equipment. Not only the equipment can produce high quality products, but also has low failure rate. Reliable operation and stable qualified products are also the important issue .
4. The low energy consumption and high energy saving of the equipment.
5. The safety and environmental protection. Safe and reliable equipment with the environmental pollution is helpful to realize clean production.
6. The sets of equipment is completed whatever device is single or units.
7. The maintainability. Good maintainability requires simple structure, reasonable combination of equipment parts, a high degree of standardization, strong repairable, etc.
8. The service life of equipment (durability). Under the premise of ensuring product quality, long service life is important.
9. In the first purchase of equipment investment, the reasonable cost of equipment should be considered, not simply pursuit "cheap equipment".