Wholesale gas prices in the Netherlands and the UK have risen 20 percent recently amid concerns about Russian supplies.The EU plans to cut its dependence on Russian gas by two-thirds this year and stop importing Russian fossil fuels by 2027. Russia e…
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…
The spread of the novel coronavirus is taking a direct hit on the operations of airlines in Asia. About 500,000 flights taking off and landing in mainland China have been canceled since January, according to aviation information company Cerium. Touri…
Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and c…
Concrete is an indispensable raw material in the construction of construction projects. In the process of preparing concrete, in order to improve the performance of concrete, it is necessary to add water reducing agent after adding water, stone, sand…
Polycarboxylic acid superplasticizers are used as high range superplasticizers in high performance concrete.Water content:3.6%pH:8Total alkali:5.8%Gas content:3.1%…
In modern concrete, the commonly used superplasticizer admixture for concrete mainly include polycarboxylic acid series, naphthalene series, fatty acid series and other water reducers. Different water reducers have their own advantages and disadvanta…
Concrete superplasticizer is high efficienct water reducing agent. Its difference from ordinary water reducing agent lies in the high-water reduction rate. The water reduction rate of ordinary water reducing agent is generally 5%-10%, and the water r…
The working principle of concrete superplasticizer…
With more and more technical exchanges on concrete in various countries around the world, various advanced concrete production equipment and construction equipment are applied to actual production, and the application of concrete will become…
You have to look closely, but the hills are alive with the force of van der Waals.Rice University scientists found that nature’s ubiquitous “weak” force is sufficient to indent rigid nanosheets, extending their potential for use i…
Under normal handling and use, exposure to solid forms of this material presents few health hazards. If subsequent operations produce dust or fumes, these may irritate the lungs, eyes, or skin. Long-term exposure to respirable crystalline silica dust...…
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