Sand aggregate is widely used in real estate, road and bridge, water conservancy facilities, etc. , the most common application scenario most people see is a road tumor. Aggregate is divided into coarse aggregate and fine aggregate, coarse aggregate refers to stones, fine aggregate refers to sand.

Broken Sand and stone industry will often hear 12 stone, 13 stone, and what does this mean? 

he original 12 stone, 13 stone in the 12,13 on behalf of the size of the sand-sand particle diameter. 12 stone, 13 stone specifically refers to the particle diameter is how big the sand？Let's take a look at the details.

Coarse aggregate-stone, generally particle diameter greater than 4.75 mm. There are 51 stone, 12 stone, 13 stone, 24 stone and 46 stone. 

51 stone is refers to the particle diameter in 5-10 mm of gravel, commonly known as corundum stone, also known as Doushi. The listening experience of a cumin stone is a small stone about the size of a mung bean. Generally used on the ground, not. It is one of the main materials of shotcrete. 

12 stone refers to the particle diameter of 10-20 mm gravel, generally used in small low-rise buildings, road base and road surface layer. It is mainly used for filling and collagen in road base. A few years ago the village Village Road Kela transformation uses very much. 

13 stone is refers to the particle diameter in 16-31.5 mm of gravel, commonly used in building foundation, large-scale engineering foundation irrigation. 

24 stone refers to two-quarter, four-quarter, international standards for 1/4-1/2 inches, particle diameter in the 10-15 mm gravel.

 46 stone refers to four, six, the international standard is 1/2-3/4 inches, particle diameter in 15-20 mm gravel.

Fine aggregate-sand, generally smaller than 4.75 mm in diameter. It is divided into coarse sand, medium sand, fine sand and ultra-fine sand. Fine sand is generally used for slotting, plastering, medium sand is generally used for masonry wall, coarse sand is mainly used for the floor. Medium sand and coarse sand can be used in concrete, ordinary concrete with medium sand is also similar.

 Coarse sand refers to fineness modulus of 3.7-3.1, the average particle diameter of 0.5 mm or more, generally known as Big Sand, also known as 05 sand. The mean particle diameter of medium sand is 0.5-0.35 mm, and the fineness modulus is 3.0-2.3. Fine sand refers to fineness modulus of 2.2-1.6, the average particle diameter in 0.35-0.25 mm, also known as face sand. Ultra-fine sand refers to fineness modulus of 1.5-0.7, the average particle diameter is less than 0.25 mm.