Determination of minimum size for double K fracture parameters of site-casting fully-graded hydraulic concrete

被引：0
|
作者：
Guan J. [1 ,2 ]
Li Q. [2 ]
Wu Z. [3 ]
Dong W. [3 ]
机构：
[1] School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou
[2] State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing
[3] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
来源：
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | 2016年 / 24卷 / 06期
关键词：
Double K fracture parameters; Fully-graded hydraulic concrete; Minimum size; One-time pouring; Site-casting;
D O I：
10.16058/j.issn.1005-0930.2016.06.013
中图分类号：
学科分类号：
摘要：
This paper experimentally presents the minimum specimen size for determining the size independent double K fracture parameters of site-casting fully-graded hydraulic concrete. Different groups of fully-graded hydraulic concrete specimens with maximum aggregate size dmax=150 mm, one-time casting in the site of an actual super-high arch dam with its mixing tower system, were tested and analyzed. The double K fracture parameters, including initial fracture toughness KIcini and unstable fracture toughness KICun were obtained. The effect of specimen size on double K fracture parameters was discussed. The research findings indicate that the minimum size for size independent double K fracture parameters (KIcini and KICun) of the site-casting fully-graded hydraulic concrete should satisfy that ligament length H2 is six times larger than the maximum aggregate size dmax. The empirical formulas for size independent double K fracture parameters changing with the maximum aggregate size (dmax) and the tensile strength (ft) were obtained by analyzing experimental results. © 2016, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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页码：1219 / 1231
页数：12
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