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一、概况: 目前,在国际上几乎公认,在混凝土中掺加外加剂是提高混凝土强度,改善混凝土的各种性能的有效而简便的方法,许多国家已把外加剂列为在混凝土中除水泥、水、砂、石以外的第五种组分,应用得非常普遍。我国外加剂的开发研究和推广应用速度与国际水平比较,还有较大差距,目前应用外加剂的水泥量占水泥总用量的比例尚不足10％。这种情况,已引起有关方面的关注。 1.我厂自从1980年以来,先后在试验室
I. Overview: At present, almost universally recognized in the admixture of concrete admixtures is to improve the concrete strength, improve the performance of concrete, an effective and easy way, many countries have admixtures as concrete in addition to cement , Water, sand, stone other than the fifth component, the application is very common. There is a big gap between the development and application of admixtures in our country and the speed of application and promotion as compared with international standards. At present, the proportion of cement in admixture to the total amount of cement is less than 10%. This situation has drawn the attention of the parties concerned. 1. Our factory has been in the laboratory since 1980