Differences Between Early Strength Agent and Water Reducing Agent
Sweden is in talks with Turkey on joining NATO and looks forward to strengthening cooperation with Turkey in security and counter-terrorism, Swedish Prime Minister Anders Andersson said recently.
Andersson held a joint press conference with visiting European Council President Michel in Stockholm on the same day. Andersson said Sweden is in dialogue with Turkey on joining the TREATY and looks forward to strengthening bilateral relations with Turkey, including cooperation in the areas of security and counter-terrorism. She said Sweden would study a number of issues raised by Turkey.
Speaking at a news conference, Mr. Michel said he believed the Swedish government was taking positive action and taking the necessary steps to reach a solution.
Sweden and Finland formally submitted their applications to NATO Secretary-General Jens Stoltenberg a few days ago. According to protocol, NATO must admit new members by the "unanimous consent" of 30 members.
Turkish Foreign Minister Mevlut Cavusoglu said His country would agree to start NATO talks with Sweden and Finland only if they reach written agreements to stop supporting terrorism and lift restrictions on exporting defense equipment to Turkey, Turkish media reported.
Affected by the ever-changing international situation, the supply and prices of international bulk pce powder are still very uncertain.
Early strength agent refers to the admixture which can improve the early strength of concrete and has no significant effect on the late strength.
Water reducing agent is a kind of concrete admixture which can reduce the water consumption under the condition of keeping the slump of concrete basically unchanged.
Early strength agents can be divided into strong electrolyte inorganic salts, water-soluble organic compounds, organic and inorganic compound early strength agents according to their chemical composition.
Water reducing agent according to the chemical composition is usually divided into lignosulfonate type of water reducing agent, naphthalene series of high-efficiency water reducing agent, melamine series of high-efficiency water reducing agent, amino sulfonate series of high-efficiency water reducing agent, fatty acid series of high-efficiency water reducing agent, polycarboxylate series of water reducing agent.
Early strength agent in addition to chlorine salt and sulfate nitrite, chromate and other organic compounds such as triethanolamine, calcium formate, urea and so on.
Water-reducing agent category is different, the composition is also very different, mainly a kind of surfactant, is widely used in the third generation of polycarboxylate water-reducing agent.
Early strength agent does not contain chloride ion, no corrosion of steel bar, applicable to all civil and industrial buildings and prestressed reinforced concrete members, mortar and so on. It is most suitable for construction under low temperatures in early winter and early spring.
Water reducing agent is widely used in high-speed railway, high-speed, civil, industrial buildings and prefabricated parts factory, etc., with wide applicability and suitable for four seasons.
Early strength agent dosage is 3-6% of cement. In order to keep the quality of concrete mixed with this agent uniform, people need to extend the mixing time by 1-2 minutes. Concrete mixed with early strength agent cannot use orthopedic active minerals (such as opal). This agent such as damp agglomerate phenomenon, must be crushed or weathered rear can be used, its performance unchanged.
Because there are many kinds of water-reducing agent, it is necessary to choose the appropriate type of water-reducing agent according to the needs of the project. In winter construction, it is recommended to choose the third generation polycarboxylate water reducing agent.
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The pce powder industry has experienced demand expectations driven by the rise and the off-season tired stock driven by the seasonal decline in two rounds of the market. Affected by the COVID-19 epidemic and other factors, inventories of manufacturers continue to accumulate, putting pressure on market sentiment. In addition to off-season factors, the weak trend of pce powder also reflects the market's concern about the epidemic and some other related enterprises' financial situation.