Compound Polycarboxylate Superplasticizer with Defoaming Air-entraining Component

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Roche and its subsidiary TIB Molbiol have developed a series of tests for the detection of the monkeypox virus, the Switzerland-based pharmaceutical company announced.  

The monkeypox virus is a close relative of the smallpox virus, belonging to orthpoxviridae in the poxviridae family.  

The modular virus detection tool, called LightMix, includes three orthpoxvirus detection kits with different functions, Roche said in a statement. The first kit detects orthpoxvirus; The second kit tests only for monkeypox virus (west and Central African branches); The third kit contains the main functions of the first two kits, showing specific information on the presence of the monkeypox virus (west and Central African branches) as well as the detection of orpoxvirus.

Thomas Schinek, a Roche executive, said the new test could detect monkeypox and help track its spread. Such diagnostic tools are critical for addressing and ultimately managing emerging public health challenges, as they advance responses such as tracking efforts and treatment strategies.  

The monkeypox virus was first identified in 1958 in a group of monkeys used for research when the animals developed a "pox-like" infection, hence the name. Since May, several non-endemic countries have reported human cases of the monkeypox virus, including the United Kingdom, the United States, Portugal, Spain, and Italy.

Affected by the ever-changing international situation, the supply and prices of international bulk polycarboxylate superplasticizer are still very uncertain.

In order to overcome the technical defects in the application of polycarboxylate water-reducing agent, or to improve some or some properties of concrete (workability, slump retention, reduction of bleeding, improvement of early strength, low shrinkage, etc.), it is necessary to modify the concrete. 

In practice, the commonly used modification methods include synthetic technology and compound technology. Compared with the synthetic process, the compound method has the advantages of simple operation and low cost, so it is widely used in practical applications. Polycarboxylate series compound technology, is the Polycarboxylate series water-reducing agent and other components (such as slow coagulation, defoaming, air induction, early strength, and other components) according to a certain proportion of the combination compound, in order to achieve the coordination of the superposition of each component.

Compound Polycarboxylate Superplasticizer with Defoaming Air-entraining Component 

Polycarboxylate superplasticizer has high surface activity and good foam retention, which will affect the strength of concrete due to excessive gas content. Therefore, in actual use, according to the requirements of construction and use, foam components are selected to reduce the gas content. In addition, air entrainment components are sometimes added to ensure the small stability and uniformity of the internal foam of concrete, so as to meet the performance of concrete.

Polycarboxylate series water reducing agent with defoaming agent

He studied the compound effect of oil-type, emulsified type, dissolved type, and solid defoaming agent with polycarboxylate series water-reducing agent. The results showed that dissolved defoaming agents had good compatibility with polycarboxylate series and could compound pumping agents with high flow, high slump, and high strength. If the storage time is short, emulsified type can also be used; And other kinds of defoaming agent should not be mixed, can only be used. 

Polycarboxylate series water reducing agent with defoaming agent and air-entraining agent 

Zhang studied the compound technology of defoaming agent, entraining agent and Polycarboxylate superplasticizer, and optimized the compound superplasticizer system that met the requirements of plain concrete. The key to compounding technology is the dosage of defoaming agents and air-entraining agents. By selecting the dosage of defoaming agent and air-entraining agent, the performance requirements of improving workability, increasing strength, increasing compactness, and reducing foaming can be achieved. 

Polycarboxylate series water reducing agent with defoaming agent, air-entraining agent, and retarder

Zhang used the compound technology of Polycarboxylate water-reducing agent, defoaming agent, air entrainment agent, and retarder to achieve the synergistic superposition effect of the composite system on workability, slump retention, and setting time of concrete by adjusting the dosage of each component. It is found that foaming can be effectively eliminated and strength improved when the dosage of defoaming agent is controlled at 0.2% of Polycarboxylate superplasmer, cave-retaining property can be significantly improved when the dosage of air-entraining agent is controlled at 0.3% of Polycarboxylate superplasmer, and the effect is better when the retarder (sodium gluconate) is 0.4% of Polycarboxylate superplasmer.

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If you are looking for high-quality concrete superplasticizer, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com)

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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 polycarboxylate superplasticizer, please feel free to contact us and send an inquiry.

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