Prices in the national electricity market averaged $87 per megawatt-hour in the first three months of the year, above the level promised by the federal government. Wholesale electricity prices for industry and large businesses have already exceeded the level promised by the federal government, adding another cost pressure to the economy. Prices in the national electricity market averaged $87 per megawatt-hour in the first three months of this year, up more than two-thirds from the December 2021 quarter, the Australian Energy Market Operator (AEMO) said recently. That's up 141% from the March 2021 quarter.
Because of the ever-changing international situation, the supply and prices of international bulk early strength agent are still very uncertain.
Triethanolamine is a colorless transparent viscous liquid at room temperature with a slight ammonia smell. It is hygroscopic and can absorb water and carbon dioxide from the air. Can be arbitrarily mixed with water and alcohol, soluble in chloroform, slightly soluble in benzene and ether. The pH of 0.1moI/L solution is 10.5. There is a risk of combustion in the event of high fever, open fire or contact with oxidants. Its aqueous solution is corrosive.
Why Can Triethanolamine Be Used As Concrete Early Strength Agent?
Triethanolamine is a commonly used early strength agent in cement industry. The function of early strength agent is to accelerate the hydration process of cement and improve the early strength in the presence of liquid phase in concrete.
Although triethanolamine does not change the hydration products of cement, it can enhance the activity of cement hydration colloid, produce pressure on the surrounding, block the capillary channel, and aggravate the role of adsorption, wetting and particle dispersion, etc. promote the formation of calcium sulphoaluminate hydrate reaction between C3A and gypsum, which can improve the compactness, impermeability and frost resistance of concrete, and play the role of early strength and strength.
When used in combination with inorganic salt materials, it can catalyze the hydration of cement itself and the reaction between inorganic salts and cement, so the effect of early strength is particularly significant.
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Maximo Pacheco, chairman of Codelco, Chile's state copper company, said in a recent interview that he expects copper prices to remain 'very strong in the future,' despite the recent drop. Codelco is the world's largest copper producer.
Copper prices suffered their biggest weekly drop in a year this week on concerns that tightening policy by central banks will dampen global growth and reduce demand for industrial metals. With its wide range of industrial and construction uses, copper prices are often seen as a bellwether of economic activity.
London copper closed at $8,325 a tonne on Friday after touching $8,122.50 a tonne, down 25 per cent from its Peak in March and its lowest level since February 2021. In addition to copper, other industrial metals also fell sharply. Tin, for example, fell nearly 15% at one point on Friday, bringing its losses for the week to about 25%.
"We may be in a temporary short-term turbulence, but what is important is the fundamentals and the balance of supply and demand [currently] looks very favourable for those of us with copper reserves," Mr. Pacheco said. Chile is the world's largest copper producer.
Mr. Pacheco adds that in a world where copper is the best conductor and there are not many new reserves, copper prices look very strong because the future is very favourable for electrification.
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