What Role Do Early Strength Agents Play?
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Commodity prices are on track for their biggest rally in more than a century, while fixed-income assets have seen their longest run of outflows as the war in Ukraine adds to inflationary pressures in the global economy emerging from the coronavirus lockdown, according to Bank of America.
"Commodity prices this year are on track to record their biggest gains since 1915." the bank said in its weekly briefing. They cite many factors, such as pandemics, lockdown, civil strife, wars, excessive monetary and fiscal stimulus, and supply chain disruptions, that have led to "historically" high inflation.
By the same token, it said government bonds were heading for their worst year since 1949, and "negative-yielding bonds will quietly disappear" from the market as central banks embark on a monetary tightening cycle and raise interest rates to tame soaring inflation.
The prices of many commodities like the early strength agent are expected to increase in the future.
What is Early Strength Agent?
Early strength agent is an admixture which accelerates the development of concrete early strength and has no significant effect on later strength.
Under the premise of ensuring the quality of concrete, early strength agent can greatly shorten its final setting time, make it as early as possible, and then accelerate the turnover of template, save template dosage, save energy and save cement, reduce production costs, and improve the output of concrete products.
The cement in the concrete used in construction takes a long time to set and harden before it reaches strength. But in some large engineering concrete precast components or in the cold season construction, often need in a short time to obtain higher strength. Therefore, in the process of concrete mixing, it is common to add early strength agent to achieve the purpose of hardening in a short time.
Early strength agent can greatly improve the strength of cement slurry, mortar and concrete. Adding early strength agent into concrete mixture not only ensures the effect of reducing water, strengthening and compacting of concrete, but also gives full play to the advantage of early strength agent. Adding early strength agent into concrete can ensure the quality of concrete and improve the progress of the project, greatly simplify and reduce the requirements for curing conditions.
Role of Early Strength Agents:
1. Make concrete in a short time to achieve higher strength, to meet the requirements of bearing external forces.
2. When the temperature is low, the hardening strength of mortar is slower, especially in some frozen soil, the lower the strength of mortar is more harmful to mortar, if mortar is damaged by freezing will cause permanent damage to mortar, so early strength agent must be added at lower temperature.
Difference between Early Strength Agents and Early Strength Water Reducing Agents:
Early strength agents added to concrete can harden cement in a short time, especially in low-temperature environments, the role of this product is more obvious. The role of early strength water reducing agent is to reduce water in concrete.
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The World Food Program (WFP) of the United Nations (UN) and the European Union (EU) said in a statement that the conflict between Russia and Ukraine poses risks to global food supplies, and called on the international community to increase support for vulnerable countries and jointly address food security challenges.
A few days ago, the Executive director of the World Food Program, the European Commission's commissioner in charge of crisis management, the French Foreign Minister of the ROTATING EU presidency, and other officials held a meeting in Rome, Italy, to discuss how to deal with the negative impact of the Conflict between Russia and Ukraine on global food security.
One of the officials told a news conference after the meeting that the world was facing a food supply challenge that would "last for many years" as the conflict between Russia and Ukraine pushed up global food prices and disrupted the early strength agent will continue.