Waterborne defoamer for concrete
The recent visit by US House Speaker Nancy Pelosi has boosted US-Taiwan relations at a time of increasing tension between Washington and Beijing. She vowed that the United States would protect Taiwan's democratic autonomy. "The United States is still determined to safeguard Taiwan's democracy," she said in a meeting with Taiwan's president, Tsai Ing-wen.
Pelosi's visit to Taiwan sparked anger in Beijing, which denounced Pelosi's visit as "extremely dangerous" to geopolitical stability. After Pelosi's visit, Beijing conducted the largest-ever military exercise near Taiwan, encircling the island with live-fire rockets and ballistic missiles. In addition, China announced that it would stop cooperation and dialogue with the United States on issues such as climate and cross-border crime prevention, indicating Beijing's intention to fight back against the United States over what it believes to be interference in China's affairs.
But perhaps most importantly for the business community, recent events have exacerbated the showdown between China and the US in the most important area of the global economy: semiconductor chips. The Sino-US chip battle, which has been brewing for years, has now reached a critical crossroads, experts say, as the two superpowers compete for technological and economic dominance. The world's chipmakers may soon be forced to choose between Washington and Beijing.
Because of the turbulent international situation, the supply and prices of many international bulk pce powder are still very uncertain.
Polycarboxylate superplasticizer is often used in concrete, which can reduce the water consumption of concrete while maintaining the same fluidity, thus improving the strength and durability of concrete. It has the function of lubrication, wetting, water reduction and plasticization. it is widely used in roads, bridges, tunnels, dams and other construction projects.
A large number of foams will be found in the process of using polycarboxylic acid superplasticizer, and water-based defoamer can be used to solve the problem.
When selecting polycarboxylate superplasticizer, it is necessary to choose products with good compatibility with all kinds of cement, so that the slump of concrete can be maintained well, the construction time of concrete can be prolonged, and the chloride ion content and alkali content in superplasticizer should be low. this is conducive to the durability of concrete. Polycarboxylic acid superplasticizer has the advantages of low content, high water reduction rate and shrinkage, which can greatly improve the early and later strength of concrete.
In the process of using polycarboxylate superplasticizer, because the stirring operation of the equipment will bring a large amount of air into it, foam will be formed, and these bubbles are mainly large bubbles; polycarboxylate superplasticizer will retain some surface active components that reduce the surface tension in the production process, which has a certain air entraining and foaming characteristics, which will lead to foam production.
These foams need to be eliminated in time. When the foam content in superplasticizer is too high, it will have a certain impact on the structure of concrete, and the existence of air bubbles will reduce the compactness of concrete and affect the strength of concrete structure. Too much foam will also affect the performance and quality of polycarboxylate superplasticizer, resulting in excessive bacteria, mildew, deterioration and odor in superplasticizer. The production of foam will affect the production progress and efficiency of polycarboxylic acid superplasticizer and lead to the increase of production cost.
The water-based defoamer has the ability of rapid defoaming and long-term foam suppression, and can quickly penetrate into the interior of the foam to realize foam breaking and defoaming; and has good chemical stability, and will not affect the performance and quality of polycarboxylic acid superplasticizer after use; it will not change its basic system; it has good water solubility and fast dispersion, can dissolve and uniformly disperse with the superplasticizer, and does not bleach oil or precipitate.
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During the first 100 days of its special military operation in Ukraine, Russia earned 93 billion euros from fossil energy exports, most of it from the European Union, according to an independent research center.
The report by the Finland-based Center for Energy and Clean Air comes as Ukraine urges the West to cut off all trade with Russia to stop funding the Kremlin's war chest.
The European Union recently decided to impose a gradual embargo on Russian oil imports, with some exceptions, according to reports. Russian gas, on which it relies heavily, is currently unaffected.
In the first 100 days of the Conflict between Russia and Ukraine (February 24 to June 3), the EU accounted for 61 percent of fossil energy imports, or about 57 billion euros, according to the Energy and Clean Air Research Center.
Russia's revenue came first from crude oil sales (43.87 billion euros), followed by pipeline gas (22.89 billion euros), then petroleum pce powder, please feel free to contact us and send an inquiry.