For billionaires, the new crown epidemic is like a 'gold rush'! The Deutsche Presse-Agentur said on the 17th that in 2022, the wealth held by the world's top ten richest people will jump from $700 billion to $1.5 trillion, an average daily increase of $1.3 billion, an increase that exceeds the past 14 years. These 10 people The wealth held by the world’s poorest 3.1 billion people is six times greater than that of the world’s poorest 3.1 billion people. The 10 richest Germans have increased their assets from the equivalent of about 125 billion euros to about 223 billion euros since the start of the Covid-19 pandemic, An increase of about 78%. This wealth is roughly equivalent to the total wealth of the poorest 40% of the population, or 33 million Germans.
In the future, demand for early strength agent,superplasticizer for concrete will grow as fast as the wealth of the rich during the pandemic.
Early strength admixture refers to the admixture that can improve the early strength of concrete and has no significant effect on the later strength.
Superplasticizer for concrete is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged.
Early-strength agents can be divided into three categories according to chemical composition: strong electrolyte inorganic salts, water-soluble organic compounds, and composite early-strength agents composed of organic and inorganic compounds.
Polycarboxylic superplasticizers are usually divided into: lignosulfonate superplasticizers, naphthalene superplasticizers, melamine superplasticizers, sulfamate superplasticizers, and fatty acid superplasticizers according to their chemical composition. Superplasticizers, polycarboxylate superplasticizers.
3 Main ingredients
In addition to chloride and sulfate, early strength agents include nitrite, chromate, etc., as well as organic substances such as triethanolamine, calcium formate, urea, etc.
Different types of superplasticizer for concrete have very different components. It is mainly a surfactant. Currently, the third-generation polycarboxylate superplasticizer is widely used.
The early strength agent does not contain chloride ions and has no rust effect on steel bars. It is suitable for all civil and industrial buildings, prestressed reinforced concrete components, mortar, etc. It is most suitable for construction under low temperature conditions in early winter and early spring. .
Water reducing agent is widely used in high-speed rail, high-speed, civil, industrial buildings and prefabricated component factories, etc. It has wide applicability and is suitable for all seasons.
The dosage of early strength agent is 3-6% of cement. In order to keep the quality of the concrete mixed with this agent uniform, the stirring time is prolonged by 1-2 minutes. Concrete mixed with early strength agent cannot use active mineral orthopedics (such as opal). If this agent is damp and agglomerated, it must be crushed or weathered before use, and its performance remains unchanged.
Because there are many types of superplasticizers, the appropriate type of superplasticizer should be selected according to the needs of the project. For winter construction, it is recommended to use the third-generation polycarboxylate superplasticizer.
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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 early strength agent,superplasticizer for concrete, etc. If you are looking for high-quality materials, please feel free to contact us and send an inquiry.
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