浅谈自密实高性能混凝土配合比的计算方法  

Comments on mix calculation method of self compacting high performance concrete

作　　者：余志武[1] 潘志宏[1] 谢友均[1] 刘宝举[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《混凝土》2004年第1期54-57,67,共5页Concrete

基　　金：国家自然科学基金资助项目(50278097)

摘　　要：　与普通混凝土相比,自密实混凝土配合比计算涉及的因素多,除了要满足强度要求外,对工作性更有很高的要求,因此,自密实混凝土配合比与普通混凝土配合比有很大差别。自密实混凝土至今没有形成统一的设计计算方法。本文对常用的自密实高性能混凝土配合比计算方法作了简单介绍,在对自密实高性能混凝土配合比计算参数如水胶比、浆集比、粗细骨料体积等方面作了一些探讨的基础上,结合固定砂石体积计算法,对全计算法进行了改进。改进后的计算方法更能符合自密实高性能混凝土的特点并且计算简单,使用方便,该方法对自密实混凝土的配制和应用推广有一定的意义。Comparing with mix calculation of ordinary concrete,mix calculation of self-compacting concrete (SCC) deals with more factors.Not only the demand of strength should be met,but also the requirements for workability should be met well,so SCC is different from ordinary concrete.Up to now,there is no uniform mix method of SCC.In this paper,mix calculation method in common use is introduced concisely. Based on discussions of mix design parameters such as water binder ratio,paste aggregate ratio,and volume content of fine and coarse aggregation,and referred to the fixed volume content of aggregate method,the modified overall calculation method is presented.It can well satisfy the demands of the trait of SCC,and the application of the method is simple and convenient.The method proposed in this paper is beneficial to the popularization of SCC.

关 键 词：高性能混凝土 自密实混凝土 配合比 计算 设计 水胶比 浆集比 粗细骨料体积 

分 类 号：TU528.062[建筑科学—建筑技术科学]