Can Pebble Crushing Be Used For Making Concrete?

Concrete is one of the construction raw materials and has a high value in the construction industry. As the core material of the building, it helps to fix the building and is the adhesive of the building. With the acceleration of the pace of urbanization and the rapid development of the construction industry, the demand for building stones is increasing. Can pebble be used for making concrete after crushing? What kind of equipment is suitable for pebble crushing?

Pebble is formed by the impact of mountain torrents, running water, extrusion, etc. Pebble has the advantages of hard texture, good wear resistance, and corrosion resistance. It is an ideal raw material for machine-made sand. The applications in the industrial field are very wide.

pebbles raw material VS pebbles after crushing

Concrete is divided into three indicators: C1/C2/C3. The higher the strength, the higher the requirements for sand and gravel.

From the table below, the main requirements are hardness, compressive strength, density, etc. While the hardness of the pebble is not Low, as long as it is processed through a reasonable process, it is fully in line with the standard for preparing high-strength concrete.

Square hole sieveNominal diameterI
Silt content (%)<1.0<3.0<5.0≤2.0≤3.0≤5.0
Clay lump content (%)0<1.0<2.0≤0.5≤1.0≤2.0
MB value<1.40<3.0<5.0<7.0≤5.0≤7.0≤10.0
MB value ≥1.40<1.0<3.0<3.0≤2.0≤3.0≤5.0
Maximum crushing value of one stage (%)<20<25<30<30<30<30
Mica (%)<1.0<2.0<2.0<2.0≤2.0≤2.0
Sulfide and sulfate content (%)<0.5<0.5<0.5≤1.0≤1.0≤1.0
quality index of silt content and crushing value
Sand classificationCoarse sandMedium sandFine sandSuperfine sandApparent density (kg/m3Loose packing density (kg/m3Voidage (%)
Sand for building3.7-3.13.0-2.32.2-1.6>2500>1350<47
Sand for concrete3.7-3.13.0-2.32.2-1.61.5-0.7
Fineness modulus and density requirements

In summary, pebbles can be used to make concrete. They are mixed with cement and other raw materials to form concrete. After the concrete is solidified, its hardness is several times larger than that of ordinary stones, so it has important applications in the construction of buildings, roads, and bridges.

And as early as a few years ago, professionals have done comparative experiments and engineering applications on the physical and mechanical properties of concrete with crushed pebbles.

They found that it can not only improve various physical indicators of cement concrete, including crack resistance but also has the advantages of good environmental protection, impermeability, and durability.

The advantages of concrete with crushed pebble

  • Dredge the waste in the channel, and the broken pebbles are green building materials.
  • Reduced the cost of concrete.
  • The shrinkage resistance and crack resistance are significantly improved, which in turn improves the impermeability and durability of concrete.
  • Concrete is easy to pump: In the production and pumping process of concrete, the friction resistance with the mixer, pump, and pump tube is reduced, it is not easy to block the tube, easy to pump, and reduces equipment wear and extends the service life of the equipment.

The most suitable equipment for pebble crushing

Many crushers can crush pebbles, such as jaw crushers, cone crushers, impact crushers, hammer crushers, etc. For better quality sand and stones, you must choose the right equipment. Both the fixed and mobile pebble crushers are supplied by AGICO.

After practice, it is proved that the cone crusher is the most suitable equipment for pebble crushing. It fits the pebble crushing production in the way of raw material size, hardness, and finished particle size and shape.

cone crusher for pebble crushing

Size of pebble raw materials

  • Pebbles with big sizes prepared for making high-quality concrete need to be crushed by a jaw crusher first. Then use a cone crusher for further pebble crushing.
  • Pebbles of small sizes can be directly crushed by the cone crusher and the finished product meet the specification requirement of concrete making.

The hardness of crushing pebbles

The special formation experience of pebbles makes them more suitable for making concrete. At the same time, its hardness has higher requirements on its crushing equipment. Generally, the hardness of pebbles is relatively high, and the equipment with high compressive strength should be a cone crusher. The cone crusher adopts the laminated crushing method, which is suitable for high hardness materials such as pebbles. In addition, the crushing parts have high-quality wear-resistant protection devices. The use of a thin oil lubrication system greatly improves the service life of the equipment.

Particle size and shape of crushing pebbles

The particle size here refers to the size of the finished product. The cone crusher has different cavity types, which can achieve different degrees of the coarse, medium, and fine crushing. The shape of the grain is controlled by the cone crusher. The crushing effect between the particles produced by its special laminated crushing method greatly increases the proportion of cubes in the finished product, reduces the content of needle-like stones, and makes the grain uniform.

To conclude, the crushed pebbles can be used for concrete. After a comprehensive analysis of the size, hardness, and specifications of the pebbles, it is concluded that the quality of the pebbles processed by the cone crusher is better, and it can also be used with mobile racks. Assembled, it becomes a multi-functional mobile cone crusher.

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