现代混凝土特点与配合比设计方法.pdfVIP

学兔兔 第 13卷第 6期 建 筑 材 料 学 报 Vol_13．No．6 2010年 12月 JOURNAL OF BUILDING MATERIALS Dec．，2010 文章编号：1007—9629(2010)06—0705—06 现代混凝土特点与配合比设计方法 傅沛兴 (fit京市建筑工程研究院，北京 100039) 摘要：对于广泛应用高效减水剂与矿物掺合料且要求有较优施工性与耐久性的现代混凝土，由于 不同流变类型混凝土胶结材浆体的流动性、黏性以及粗集料级配与用量差别很大，因而必须按不 同流变类型混凝土设计配合比．提出了每种流变类型混凝土胶结材浆体量范围与拌和用水量的选 取方法．富勒氏集料连续级配公式并不能适用于不同流变类型混凝土，因此建立了4个集料连续级 配计算式，并通过这4个计算式计算出各种流变类型混凝土的适宜粗集料用量． ‘ 关键词：现代混凝土；配合比；流变类型；胶结材浆体；连续级配 中图分类号：TU528 文献标志码：A doi：10．3969／j．issn．1007～9629．2O10．06．001 Characteristics of Modern Concrete and Mix Proportion Design Method FU Pei—xing (Beijing Building Construction Research Institute，Beijing 100039，China) Abstract：In modern concrete，high performance water reducing agent and mineral additive are widely used，and this type of concrete is required to have excellent workability and durability．To meet the de— mand of the different fluidity，cohesion ability of paste of cementitious materials of concrete with different rheology，and the different grade of coarse aggregate，the mix proportion of concrete must be designed ac— cording to its types of rheology．The proper amount of paste and the quantity of water can be deduced．Be— cause the Fuller formula of continuous grading aggregate calculating cannot be applied to concrete with dif— ferent rheology，four formulas are proposed separately．Based on such formulas，the proper amount of coarse aggregate in each kind of concrete with different rheology can be calculated． Key words：modern concrete；mix proportion；type of rheology；paste of cementitious materials；continuous grading