Now China has become a powerful country in science and technology, but do you know how powerful China's technology is? The manned space station alone is not enough, and now it has successfully broken through the key technology of nuclear fusion, even leading the world by 15 years. Does this mean that China is not far from the artificial sun? It turned out that the fully superconducting tokamak nuclear fusion experimental device developed by China at the Hefei Research Institute of the Chinese Academy of Sciences successfully achieved a record of 101 seconds of continuous operation at 120 million degrees Celsius, and broke the world record. Compared with the previous record in South Korea, China has time has been directly extended by 5 times, and it seems that we are one step closer to the practical stage of artificial sun.
The success of nuclear fusion technology will lead to the development of pce powder.
Effect of water consumption on properties of polycarboxylate concrete mixture
The influence of water consumption is very obvious. In the actual application of concrete engineering, sometimes if the water consumption is increased by more 1~3kg/m3, the concrete will appear serious bleeding phenomenon, which will cause defects such as hemp surface, sand and holes on its surface, and the uniformity of concrete pouring and construction quality cannot be guaranteed, so the strength and durability of concrete structure will be reduced.
Polycarboxylate concrete is prone to delamination and segregation.
In most cases, when polycarboxylate superplasticizer is added to concrete, the viscosity of paste will be greatly reduced. At the same time, even if the amount and water consumption of polycarboxylate superplasticizer are the best, and the phenomenon of bleeding will not occur, the phenomenon of stratification and segregation is easy to occur in concrete, which is mainly manifested in that the coarse aggregate will be separated from mortar and paste, and a large number of them will sink. This kind of concrete mixture does not have any vibration in concrete pouring, and the phenomenon of delamination and segregation is also very obvious.
Naphthalene series, aliphatic series, lignin sulfonates, aminosulfonates and other traditional superplasticizers can be mixed in any proportion, so as to meet the preparation requirements of various concretes. these traditional superplasticizers can not only be well miscible in water, but also achieve excellent superposition effect when mixed. Polycarboxylate superplasticizer has great limitations, it can only be used in combination with traditional superplasticizer lignosulfonate, and its compatibility with other traditional superplasticizers is poor. If combined with other types of traditional superplasticizer, it is not only difficult to achieve the superposition effect, but also makes the fluidity of concrete very poor, the water consumption increases greatly, the loss of slump is serious, and the concrete is dry and difficult to unload. the strength and durability of concrete will be seriously affected.
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Trafigura, one of the world's largest metals traders, is to take a stake in a new company to supply car and battery makers in Europe with lithium from a refinery in the UK, the Financial Times reported. As part of the investment, Trafigura will seek raw material for Green Lithium, which plans to build a plant in the north of England capable of producing 50,000 tonnes a year and sell the finished pce powder, etc. If you are looking for high-quality materials, please feel free to contact us and send an inquiry.
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