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What are the different requirements for mechanism sand and river sand or river sand in construction engineering?
Release time:
2023-09-20 15:46
Basically, there is no difference. The particle shape of the mechanism sand has more edges and corners than the river sand, and the bonding ability with the cement slurry is better, but it is not good for pumping concrete.
Machine-made sand mainly detects stone powder content, river sand detects silt content, and other detection indicators are basically the same.
Sand as a floor material, generally using local materials, as long as the crushing value meets the requirements, grading is not too big problem, stone powder content does not exceed the standard can be used. River sand is less and less. Machine-made sand was not allowed to be used on high-speed railways before, but now it is included in the standard. Machine-made sand will be used more widely in the future.
Extended information:
Current situation of river sand and mechanism sand use
In recent years, with the continuous development of various construction undertakings, the demand for concrete is increasing, and sand, as an essential part of concrete production, also has a more important impact on the performance of concrete.
The main types of sand used in the field of engineering construction are river sand and machine-made sand. As a resource, river sand is mainly distributed in the river basin. With a large number of uncontrolled mining, the use of natural river sand is generally faced with the problems of mining difficulty, large investment in river sand procurement cost and continuous reduction of resources, which have a negative impact on the implementation of engineering construction projects.
In addition, due to the high mud content and poor quality of some river sand, the strength and stability of concrete are affected. Facing the lack of river sand resources, high price and difficult quality control, looking for its alternative materials has become the focus of research on concrete sand.
In concrete for the application of river sand replacement is mainly machine-made sand. Machine-made sand refers to crushed stone particles with a particle size of less than 5.00mm obtained through mechanical crushing and screening of crushed stone.