Natural river sand

The natural river sand resources in Lingshou County of Hebei are extremely rich. The water quality in the river is clear without industrial pollution, and the soil content and impurity quality are very few. The grain size is between 2.8mm and 3.2mm, and the natural river sand is mainly sandy beach sand, its pigments are gray and gray yellow, including medium fine sand, coarse sand, coarse sand, gravel layer and gravel layer. With the river bed as the direction, the surface is inclined from the riverbank to the river bed and inclines from the upstream to the downstream. The average sand thickness is about 3 meters, the deepest reaches 10 meters, the total storage is about 15 million cubic meters, and the annual increment of the sediment density is about 500 thousand cubic meters, 2580kg/m3 accumulation density 1569kg/3m fineness modulus of 2.89 genera and sediment content of 2.89 genera. 1.34%, hard texture and bright color are good building materials. Our company supplies all kinds of natural grade river sand, and welcome the necessary manufacturers to contact!
The aggregate with a diameter larger than 4.75 mm is called coarse aggregate, commonly known as stone. There are two common types of gravel and pebbles. Gravel is a rock particle made up of natural rock or rock by mechanical crushing and screening, and its diameter is greater than 4.75 mm. Cobble is a natural rock weathering, water transport and sorting, stacking, and particle size greater than 4.75 mm of rock particles. The length of pebbles and gravel particles is more than 2.4 times the average particle size of the particle, and the one with a thickness less than 0.4 times the average particle size is a sheet particle (average particle size refers to the average value of the upper and lower limits of the grain size). The construction of pebble and gravel should meet the technical requirements of the national standard GB/T 14685-2001 "pebble and gravel for construction".
River sand is divided into two types: natural sand and artificial sand. Natural sand is a rock particle with a particle size less than 4.75 mm, which is formed by natural weathering, flow and separation and accumulation, but does not include particles of soft rock and weathered rock. Natural sand includes river sand, Lake sand, mountain sand and desalinated sea sand. Artificial sand is the general name of the machine-made sand and mixed sand treated by soil removal.
Requirements for quality of fine aggregate (artificial sand and natural sand) in specification for hydraulic concrete construction 2001:
1, the fine aggregate should be hard, clean and good gradation; the fineness modulus of artificial sand and within the range of 2.4 ~ 2.8, the fineness modulus of natural sand should be within the range of 2.2 ~ 3. The use of mountain sand and coarse sand should be tested accordingly.
2. In the process of mining, fine aggregate should be tested regularly or according to the quantity of a certain amount of mining. In a period of potential harm, corresponding measures should be taken and proved by special tests.
3. The moisture content of fine aggregate should be kept stable. The moisture content of the saturated sand surface of artificial sand should not exceed 6%. If necessary, accelerated dewatering measures should be taken.