The Group of Seven leading economies is discussing imposing a cap on Russian oil prices by imposing restrictions on insurance and shipping, according to people familiar with the matter. The potential mechanism would only allow shipments of Russian crude oil and petroleum early strength agent,superplasticizer for concrete are still very uncertain.
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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Gas prices in European countries are expected to triple if Russian supplies are restricted, according to a press release from Rystad Energy, a Norwegian Energy consultancy.
The price of natural gas in Europe was $1,200 per 1,000 cubic meters on Tuesday. The benchmark price is already 300 percent higher than a year ago. European gas prices are expected to continue to soar to $3,500 per 1,000 cubic meters if Russian supplies are restricted, according to Analysis by Monitor.
In 2021, Russia delivered 155 billion cubic meters of gas to Europe, accounting for 31 percent of its gas supply, according to an analysis by Monitor Advisors. It would be difficult for Europe to replace Russian gas, which would also destabilize the global LNG market and have a profound impact on Europe's population and economy.
The analysis also said that if Russia stopped supplies now, Europe's current gas reserves would be exhausted by the end of the year, setting in for a cold winter.
In addition, affected by the geopolitical factors, the supply of the early strength agent,superplasticizer for concrete is erratic and thus its prices are expected to go higher in the future.
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