1 前言以高工作性为主要特征的免振捣、自密实高性能砼(Self-compacting Concrete,简称 SCC)因其自身独特的性能也越来越展现出强大的生命力。由于 SCC毋须振捣即能密实成型,使传统砼施工技术产生质的飞跃,不仅适应了当代砼工程超大规模化、复杂化的要求,而且为基于耐久性的砼结构设计提供了技术保障。就材料而言,由于采用了高性能外加剂和大掺量矿物外掺料,使得低水胶比、低水泥用量的砼配制成为可能,从而提高了硬化砼的力学性能及耐久性;就设计而言,由于 SCC 能够在自重作用下自动穿越钢筋密集处,并且仍保持混合料的均匀性,为密集配筋结构设计的实现提供了可靠的技术保障;就施工而言,SCC 的应用不仅可以缓解熟练工人日益短缺的危机,而且消除了振捣噪音,减弱了工人的劳动强度,避免由于振捣不密实而带来的施工隐患,加快了施工进度,保证了工程质量,提高了文明施工和现代化施工管理水平。江苏省建筑科学研究院有限公司(改制以前的江苏省建筑科学研究院)自1996年以来,主要从发展高 1 Introduction Vibration-free and self-compacting Concrete (SCC), featuring high workability, is also increasingly demonstrating strong vitality due to its unique properties. Because SCC can be compacted without the need of vibration, the traditional concrete construction technology has made a qualitative leap, which not only meets the requirements of oversized and complicated contemporary concrete projects, but also provides technical support for the design of concrete structures based on durability. In terms of materials, due to the use of high-performance admixture and a large amount of mineral admixture, making low water cement ratio, low cement content of the concrete formulation possible, thereby enhancing the mechanical properties of hardened concrete and durability; on the design In terms of SCC, it can provide reliable technical support for the design of dense reinforcement structure because SCC can automatically penetrate the steel reinforcement under its own weight and maintain the uniformity of the mixture. In terms of construction, the application of SCC not only can Alleviates the crisis of increasingly shortage of skilled workers, eliminates vibrations and noise, weakens the labor intensity of workers, avoids hidden construction problems caused by not compaction, accelerates construction progress, ensures project quality and enhances civilized construction and Modern construction management level. Jiangsu Provincial Academy of Building Research Co., Ltd. (Jiangsu Academy of Building Research before restructuring) Since 1996, mainly from the high development