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J4  2010, Vol. 44 Issue (4): 826-830    DOI: 10.3785/j.issn.1008-973X.2010.04.034
土木与建筑工程     
基于骨料信息的自密实混凝土配合比设计新方法
龚灵力1, 金南国1, 何小勇2, 金贤玉1
1.浙江大学 土木工程学系,浙江 杭州 310027; 2.核电秦山联营有限公司,浙江 海盐 314300
New method of mix design for selfcompacting concrete
based on aggregate information
GONG Ling-li1, JIN Nan-guo1, HE Xiao-yong2, JIN Xian-yu1
1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China;
2. Nuclear Power Qinshan Joint Venture Co. Ltd, Haiyan 314300, China
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摘要:

根据比表面积定义并考虑实际操作的简便性,提出一种表征骨料比表面积的简易计算方法.利用骨料比表面积反映骨料粗细程度以及各粒径分布,在砂填充石子空隙与净浆填充骨料空隙的过程中分别引入富余砂裹厚度以及净浆包裹骨料厚度概念,并结合自密实混凝土(SCC)各组分的体积相加性,推导SCC各组成用量的计算式,提出新的SCC配合比设计方法.此设计方法操作简便且方便实现电算.采用此方法配制C35和C50两个等级的SCC,试验检测结果表明,C35和C50的工作性能及强度均达到设计要求,其中C35在现场试验中效果良好.

Abstract:

According to the definition of specific surface and in view of the simplicity of practical operation, a convenient method was presented to estimate the specific surface of aggregate, which applied to represent the coarsetofine degree and the particle size distribution of aggregate. Two new concepts, surplus thickness of sand and thickness of paste around aggregate, were introduced in the processes of sand filling gravel void and paste filling aggregate void respectively. Based on these concepts and the volume additivity of selfcompacting concrete (SCC) components, the mass content formula of each SCC component was deduced. Thus a new method of SCC mix design was established, which is convenient and easily computerized. C35 and C50 SCC were confected by this method and tested then. The results indicated that the workability and strength of C35 and C50 SCC both met the design objective, and C35 SCC behaved excellently in site experiment.

出版日期: 2010-05-14
:  TU973  
基金资助:

国家自然科学基金资助项目(50838008);国家“973”重点基础研究发展规划资助项目(2009CB623200);教育部博士点基金资助项目(20070335087).

通讯作者: 金南国,男,教授.     E-mail: jinng@zju.edu.cn
作者简介: 龚灵力(1981—),男,湖南桃江人,博士生,从事混凝土及混凝土结构性能研究. E-mail: lingmao@zju.edu.cn
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引用本文:

龚灵力, 金南国, 何小勇, 金贤玉. 基于骨料信息的自密实混凝土配合比设计新方法[J]. J4, 2010, 44(4): 826-830.

GONG Ling-Li, JIN Na-Guo, HE Xiao-Yong, JIN Xian-Yu. New method of mix design for selfcompacting concrete
based on aggregate information. J4, 2010, 44(4): 826-830.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2010.04.034        http://www.zjujournals.com/eng/CN/Y2010/V44/I4/826

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