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修改這篇文章 : What is superplasticizer concrete?

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Concrete admixture is a chemical substance that is added during the mixing of concrete, cement paddle or mortar, before mixing or in additional mixing to improve the performance of concrete. In special cases, the amount added generally does not exceed 5% of the cement quality. At present, in response to various special requirements of concrete engineering, many kinds of admixtures have been developed to meet various requirements. Adding them to concrete in an appropriate manner can achieve some expected effects. According to the function of these additives, they can be divided into water reducer, accelerator, retarder, air-entraining agent, waterproof agent, binder, expansion agent, rust inhibitor, defoamer, mold release agent, colorant , Among the concrete admixtures, the most striking is the high-efficiency water-reducing agent. The development of superplasticizers has a history of nearly 40 years. In 1962, Japan’s Kenji Hattori held an important position in naphthalene superplasticizer. In 1963, the original Federal Germany successfully developed melamine sulfonate formaldehyde condensate.

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