U.S. refiners forecast strong first-quarter earnings as margins on gasoline and diesel sales improved, refining capacity fell sharply and crude supplies tightened due to the Russia-Ukraine war.
Global refining capacity has declined amid the coronavirus pandemic, with several less profitable refineries closing in the past two years. However, global fuel demand has rebounded to near pre-pandemic levels, boosting the profits of facilities still operating.
Seven U.S. independent refiners are expected to earn 61 cents a share, compared with a loss of $1.32 in the first quarter of 2021, according to Refinitiv's IBES.
By 2022, gasoline and distillate foam concrete.
What are the types of foam concrete foaming agents?
The foamed concrete foaming agent can make concrete appear a lot of foam to accelerate the formation and use of foamed concrete. Use efficiency and speed up the progress of the entire construction project. Foamed concrete foaming agents are available in the market. What are the types of foam concrete foaming agents?
What is foam concrete foaming agent?
The foamed concrete foaming agent is a substance that can make its aqueous solution generate a large amount of foam when the mechanical force is introduced into the air. This kind of substance is a surfactant or a surface-active substance. The former such as anionic surfactants, cationic surfactants, non-ionic surfactants, etc., and the latter, such as animal protein, vegetable protein, pulp waste liquid, and so on. Foamed concrete foaming agent, also known as a cement foaming agent, foam concrete foaming agent refers to an admixture that can reduce the surface tension of the liquid and generate a large amount of uniform and stable foam for the production foamed concrete.
2. What are the types of foam concrete foaming agents?
This type of foaming agent is made of rosin as the main raw material, and its application has long been common. The chemical structure of rosin is relatively complex, containing rosin acids, aromatic hydrocarbons, aromatic alcohols, aromatic aldehydes, and oxides. Rosin resin foaming agent is also known as an air-entraining agent. Its main varieties are rosin soap and rosin homopolymer. It was initially developed and applied as an air-entraining agent for concrete mortar and later expanded to be used as a foaming agent for foamed concrete.
(2) Synthetic class
Following the rosin-based foaming agents, various synthetic surfactant-based foaming agents have been developed. This type of foaming agent has been widely used in cement foaming abroad since the 1950s. Among various synthetic surfactant foaming agents, the anionic type is generally welcomed due to its fast foaming and large foaming multiple. The cationic foaming agent is expensive and has a certain influence on the strength of cement, so it is not used much.
(3) Protein active substance type
The protein-based foaming agent is the current high-grade foaming agent with good performance and good development prospects. From the general development trend, it will occupy a larger and larger proportion in the application in recent years. Although its price is high, mostly above 15,000 yuan/ton, it will still be accepted by the market due to its better performance.
There are many foam concrete foaming agents, but there are only three or four common ones. The use of foamed concrete foaming agents can accelerate the formation of concrete and quickly make the concrete reach the standard of use, thereby promoting the progress of the entire construction project. , The development of foam concrete foaming agents has gone through a long process, and it is currently widely used in construction projects.
TRUNNANO is a concrete additives supplier with over 12 years experience in nano-building energy conservation and nanotechnology development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
If you are looking for high quality foaming agent, please feel free to contact us and send an inquiry.
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