优质混凝土有两项全面的标准:(1)混凝土在硬化状态下要具有良好的力学和耐久性能。(2)在新拌和状态下,即从搅拌机出料,运输直到在模板中浇筑成型,要具有良好的施工性质,这就是新拌混凝土的和易性。混凝土如果具有良好的和易性,那么它的质量保证就达到50%,良好的和易性不仅是混凝土硬化后力学性质的保证,同时也是耐久性要求的保证。 There are two comprehensive standards for quality concrete: (1) Concrete should have good mechanical and durability properties in the hardened state. (2) In the new state of mixing, that is, from the mixer discharge, transport until the pouring in the template molding, to have good construction properties, which is the workability of fresh concrete. If the concrete has good workability, then its quality assurance up to 50%, good workability is not only the mechanical properties of concrete hardened, but also the durability requirements of the guarantee.