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现在越来越多的人认识到,外加剂是混凝土中除水泥、砂、石和水之外的不可缺少的第5种材料。混凝土外加剂是为改进水泥净浆、砂浆和混凝土的某些性能而掺入的物质。混凝土应具有耐久、高强、轻质等性能,随着科学技术的发展,应用外加剂就能够进一步提高这些性能。此外,应用外加剂还可以改善施工操作条件,并节约水泥。从使用功能来看,混凝土外加剂有四类,
More and more people are now realizing that admixtures are the indispensable fifth material in addition to cement, sand, stone and water. Concrete admixtures are substances that are incorporated to improve certain properties of cement pastes, mortars, and concrete. Concrete should be durable, high-strength, light-weight and other properties. With the development of science and technology, the application of admixtures can further improve these properties. In addition, application of admixtures can also improve construction operating conditions and save cement. Judging from the use of functions, there are four types of concrete admixtures.