Under the current situation, with the vigorous promotion of infrastructure construction, the demand for sand and gravel aggregates is increasing. Manufactured sand has gradually become the main raw material for construction sand. In order to meet the requirements of different fields, it is generally divided into coarse sand, medium sand and fine sand.
What is the difference between coarse sand and fine sand?
The thickness of sand refers to the average thickness of sand grains of different particle sizes. The difference between coarse sand and fine sand is mainly reflected in the fineness modulus, particle size, application field and **.
Coarse sand:
The fineness modulus is 37-3.1, greater than 0The particle content of 5 mm is more than 50% of the total weight and the average particle size is greater than 05 mm.
Generally, coarse sand is relatively cheap and can be used to replace other sand to save costs, but it contains a lot of mud, which is mostly used for mortar floors, beams, slabs, columns, foundations and large volumes of concrete.
Fine sand:
The fineness modulus is 22-1.6. The particle size is greater than 0The 25 mm particles make up more than 85% of the total weight and have an average particle size of 035 mm-025 mm.
Fine sand ** is slightly higher, and the difference between medium sand and fine sand is not very large. It is generally used as a mortar for masonry and expansion joints, but fine sand is rarely used alone in general buildings.
In addition, if you hold different kinds of sand in your hands, you will find that fine sand can agglomerate, medium sand is difficult to agglomerate and easy to loosen, and coarse sand cannot agglomerate at all. These properties can also affect the application of different sands at different stages of the project.