Artificial sand: After soil removal treatment, it is manufactured by mechanical crushing and sieving. The particle size is less than 4.7mm of rocks, mine tailings, or industrial waste slag particles, but does not include soft and weather particles.
Natural sand: Rock particles formed by natural conditions (mainly rock weathering) with a particle size 5mm, called natural sand.
Artificial sand: It is a sand-gravel material obtained after crushing by professional sand-making equipment such as a crusher. Compared with natural river sand, it has the characteristics of sharp edges and sharp edges and many needles.
Natural sand: It is dug directly from the river channel, so it will be combined with small pebbles and fine sand. These tiny pebbles are washed by the river for a long time, and the edges and corners are relatively round.
The firmness of artificial sand is worse than that of river sand, but it can still reach the index of superior products. It will not cause problems when it is used in ordinary concrete construction, but when it is used in concrete construction that is often subjected to frictional influence, admixtures must be added. At the same time, the lime-sand ratio of the concrete and sand crushing index and stone powder should be controlled.
Natural sand: The mud content of natural sand means that the particle size is less than 0.075mm, it is composed of viscous clay particles, and has a large plasticity index. It has no connection effect with the crystal stone after cement hydration. Therefore, the mud content of natural sand directly affects the composition of concrete strength.
Artificial sand: The powder content of artificial sand is finely ground rock powder less than 0.075mm. It cannot react with cement hydration, but it can be in an excellent connection with cement crystal stone, which has a filling effect of micro-aggregates in the internal layout. Usually, If the powder content of artificial sand is not more than 20%, it will not have a bad effect on the cohesion time and strength development of concrete, and it will be beneficial to the work-ability concrete, pump-ability, and strength of the concrete mixture.
Artificial sand is generally selected by man-made materials, and the material is uniform and stable. Its mineral composition and chemical composition are consistent with the raw materials, but there is no complex composition of natural sand.
A fineness modulus of native sand that can be graded in many ways. The fineness modulus of the artificial sand can be artificially controlled by the production process and organized according to the requirements of the user, which can not be done by natural sand.
Summary: it has been proved that the artificial sand not only has the advantages of wide source, stable material, easy operation and control, good performance but also is the development direction of the construction market in the future, which is also very beneficial to the protection of the environment.
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