现今混凝土的重要特点,在于它普遍掺用外加剂和矿物掺合料,组分多且水灰比(水胶比)变化范围可以很大,这使得混凝土的设计与优化面临很大的挑战,文章以掺有高效减水剂的大掺量粉煤灰混凝土案例及其分析,说明以工程需要为依据,改变混凝土设计理念和实践的必要性。 Nowadays, the most important feature of concrete is that it generally incorporates admixtures and mineral admixtures. With a large amount of components and a wide range of water-cement ratio, the design and optimization of concrete face great challenges. The paper analyzes the case of high volume fly ash concrete mixed with superplasticizer and analyzes the necessity of changing the conception and practice of concrete design based on engineering needs.