What is the difference between mechanism sand and river sand?

Mechanism sand and river sand are two different types of sand produced through different processes. Here's the difference between them:

1. Origin:

Mechanism sand: Also known as artificial sand or manufactured sand, it is produced by crushing granite, limestone, quartzite, and other hard rocks in a crushing plant. The crushed material is then processed through screens and classifiers to separate particles based on size.

River sand: River sand is naturally occurring sand formed by the erosion of rocks in rivers and streams. It is made up of particles derived from the breakdown of rocks like granite, quartz, and feldspar. River sand is often found along the banks of rivers, streams, and in riverbeds.

2. Composition:

Mechanism sand: The composition of mechanism sand depends on the type of rock from which it is derived. It generally contains quartz, feldspar, and other minerals present in the original rock. The particles are relatively uniform in size and shape.

River sand: River sand is mainly composed of quartz and feldspar, with smaller amounts of mica, chlorite, and other minerals. The composition of river sand varies depending on the source rock. The particles are generally irregular in shape and size, with a higher degree of variability.

3. Texture and particle size:

Mechanism sand: The particles in mechanism sand are usually more rounded and have a finer texture compared to river sand. The uniform particle size distribution makes it suitable for concrete and mortar applications.

River sand: River sand has a coarser texture and more irregular particles compared to mechanism sand. The particle size distribution varies depending on the source and processing methods.

4. Processing method:

Mechanism sand: The production of mechanism sand involves crushing, screening, and processing rocks in a controlled environment. The processed sand is usually washed and dried to remove fines and impurities.

River sand: River sand is naturally produced through the erosion of rocks in rivers and streams. It is usually washed by water flow, which helps in removing fines and other impurities.

5. Uses:

Mechanism sand: Mechanism sand is widely used in construction industries for making concrete, mortar, and other building materials. It is also used in glass manufacturing, foundry industries, and as a filling material.

River sand: River sand is primarily used in the construction industry for making concrete, mortar, and plaster. It is also used in landscaping, filter media, and as a base layer for road construction.

In summary, mechanism sand and river sand differ in their origin, composition, texture, particle size, and processing methods. Both types of sand are widely used in construction applications, but mechanism sand is often preferred for its uniform particle size and finer texture. However, river sand is still widely used due to its natural origin and availability.