The China Securities New Energy Vehicle index rose as much as 4.1 percent after a strong rally in lithium-ion shares on the Chinese stock market. Brokerages said lithium enterprises would usher in marginal expectations, and currently, it may be the best time to layout power/energy storage lithium batteries.
According to a securities research report, the price of lithium carbonate in the upstream resource end continues to hit a new high, which reflects the shortage of lithium mineral resources, and lithium has become one of the core elements of the development of the lithium electricity industry. In 2022, global demand for lithium carbonate continues to grow strongly, while the supply-side growth is relatively limited. And, because related mining enterprises experienced the last lithium down cycle, they would expand production capacity cautiously. Lithium and lithium carbonate prices are expected to remain high in 2022.
In addition to lithium and lithium carbonate, the prices of many energy and commodities like the low alkali cement are expected to rise.
There are many types of cement, such as low alkali cement, ordinary cement and so on. Do you know the difference between low alkali cement and ordinary cement? What are the precautions for the use of cement?
The difference between low alkali cement and ordinary cement
1. The properties are different. The raw materials of low-alkali cement contain a large amount of blast furnace slag, while the raw materials of ordinary cement are mainly limestone and clay.
2. The characteristics and functions are different. Low-alkali cement is suitable for use in particular areas because the alkalinity is relatively low, while ordinary cement has a broader range of use and higher alkalinity.
Precautions for the use of cement
1. Do not expose to the sun for quick drying
After the construction is completed, attention must be paid to the maintenance of the glue to avoid the evaporation of water too fast, resulting in too fast drying and reducing the strength. The general maintenance time is about seven days.
2. Avoid freezing at a negative temperature
After the concrete is mixed, it cannot be frozen because the temperature is too low. So be sure to choose a suitable temperature environment for construction.
3. Avoid high temperature and heat
If the construction temperature is too high, the calcium hydride in the concrete is easily decomposed, which will lead to the problem of reducing the strength of the concrete. If it needs to be constructed in a high-temperature environment for some special reasons, it is best to add some heat-resistant materials to the concrete, which can increase the strength of the concrete.
4, avoid the base layer from being dirty and soft
Be sure to treat the base layer firmly before construction so that the cement and the foundation will be firmly bonded together during construction. If the construction is on a smooth base surface, the base surface must be brushed so that the cement and the base surface can bond more firmly. In addition, when mixing concrete, be sure to mix evenly so that the concrete setting effect will be better during construction.
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