Why can not sea sand for real estate construction

Natural sand scarcity has become more and more people's consensus, the river can not meet the market demand for sand and gravel, can only start from the machine sand, which also makes the mechanism of sand in recent years more and more hot, the system of sand production line has become A lot of gravel plant competing to buy products, high-quality sand production line equipment is more manufacturers of sand and gravel in the small and medium enterprises in the stand out of the magic weapon.

Some people questioned, since the river sand less and less, can not meet the natural sand and gravel demand, why not sea sand? The existence of sand is certainly a lot of sand, and there is no river sand excavation damage to the river environment, there are security risks and other issues, can not be used for infrastructure construction?

Joyal machinery sand and gravel experts tell you the answer, not desalinated sea sand can not be used as building materials. This is the state strictly prohibited, why is this?

We all know that with the continuous development of society, now the real estate construction are mostly made of sand and concrete reinforced concrete construction, although the sand itself is pure, low mud content, but because of its moisture and a large number of free chlorine Ions and other acid ions, when they are used in reinforced concrete, these free chlorine ions will corrode the steel, resulting in expansion of steel, which caused the structural components of their own expansion and deformation, bearing capacity decreased, seriously affecting the safety of the building.

The damage caused by the desalination of the sea sand to the rebar is very serious. If the acid ions such as chloride ions are corroded, the steel bars are getting thinner and the mechanical properties are decreasing and the yield strength and elongation are significantly decreased. A large number of water molecules, easy to make steel rust, reinforced rust after the expansion of the volume, will burst around the concrete, resulting in cracks, serious and even lead to the surface of the concrete off; ribbed steel to rely on the surface of the crescent-shaped ribs Concrete anchored together, like the screw on the thread, not easy to fall off, once the steel corrosion, crescent-shaped thread corrosion damage, ribbed steel bar into a smooth cylindrical, anchor performance significantly reduced.

Desalination of the sand can be used for construction, but the high cost of desalination desalination, and the process requires a higher. Although there are some areas have used sandals as a precedent for concrete ingredients, but the fact that there is indeed a reduction in the use of the building life. Before the domestic river sand is unregulated state, easy access, and now the cost of sand is not high, and the safety is relatively high, so rarely use sand.

Through the above description, I believe we have to understand why the sand is not used for construction, more information on aggregate aggregate, please contact the Red Star machine to understand the consultation.

shanghai joyal sand making plant

a brief introdction of shanghai joyal Sand making plant
Technical advantages: we have designed a full set of sand production lines, in the industry's leading position.
Production process: stone by the vibration feeder evenly sent to the jaw crusher for rough, rough after the material into the jaw crusher to break again.
Components: vibration feeder, jaw crusher, sand making machine, vibrating screen, sand washing machine, Rubber Belt Conveyor, centralized electronic control and other equipment.


working principle of shanghai joyal sand making plant

First, the stone is crushed by the coarse crusher, and then the resulting coarse material is conveyed by the tape conveyor to the crusher for further crushing. The finely divided stone enters the vibrating screen to separate the two stones to satisfy the sand The size of the stone into the sand machine sand, the other part of the material into the fine break into the sand into a part of the sand made of sand, the sand washing machine (optional) after cleaning into finished sand, the other part into the sand machine again broken.


Performance characteristics of shanghai joyal sand making plant 

1. High degree of automation
The sand production line has a high degree of automation and low running cost.

2. Artificial sand gradation is better
Artificial sand inside the mud powder can be removed through the separator to achieve the standard building sand, and the separator can also control the artificial sand in the stone powder content, so that within the provisions of the state, thereby enhancing the compression of concrete Strength and workability of concrete.

3. Product grain is good
To produce the system sand in line with national standards for building sand, uniform size, grain shape is good, supporting reasonable.
Broken rate is high

4. High broken rate, energy saving, large output, less pollution.

Through this article, you can know our Shanghai Joyal's sand making plant , if you want to get more information, please contact our company's Web site customer service.