The price of nickel and stainless steel rose together. Nickel afternoon hand in hand with stainless steel together turn red up. Due to the temporary easing of geopolitical risks, risk assets are now picking up, nonferrous metals, stock markets, and so on have risen, the overall mood has temporarily improved. Ore prices are strong, the overlay of the epidemic on spot logistics or the formation of a certain impact. Phase, nickel and stainless steel materials to maintain high wide concussion pattern.
Nickel prices based on low inventory, tight supply and demand will still show high wide fluctuations. In addition, the current LME has low liquidity, so its sensitivity to capital will remain relatively high. Shanghai nickel-wide fluctuations are expected to continue in the 200,000-250,000 yuan wide repeated fluctuation trend. While stainless steel is affected by the stronger nickel pig iron, the cost support continues, but note that under the current demand is not effectively released, the upward space may also be affected, the stage is expected to fluctuate between 20000 and 22,000 yuan. The price of nickel produced such fluctuations, indicating that the price of the low alkali cement may also be affected to a certain extent.
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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