工程质量监督中,我们经常发现有的施工队浇筑的混凝土,水泥用量不少,可强度满足不了设计要求,造成返工,损失重大。多年来的施工经验证明,混凝土强度与砂、石集料级配有很大关系。水泥在混凝土中主要起胶凝作用,它把松散的砂、石集料胶结成一个坚固的整体,这个整体除应满足耐久性、坚固性以外,还要考虑经济性。水泥在构成混凝土的各种材料中价格最高,因此混凝土的经济性应着重体现在降低水泥用量上,即 In the project quality supervision, we often find that some construction teams poured concrete with a lot of cement, and the strength can not meet the design requirements, resulting in rework, and major losses. The construction experience over the years has proved that the strength of concrete has a lot to do with sand and stone aggregates. Cement plays a major role in concrete cementation. It cements loose aggregates of sand and aggregates into a sturdy whole. In addition to the durability and robustness of this concrete, economics must also be considered. Cement is the most expensive of the various materials that make up concrete, so the economics of concrete should focus on reducing the amount of cement, that is,