摘要
粗骨料粒径分布对混凝土强度分析有重要影响,但如果不用切割方法,混凝土内粗骨料三维粒径分布测量就无法实现。探索一种在条件概率基础上的利用局部信息推导全局信息的测量方法,将“二维截面估计骨料粒径”分析引入骨料级配的量测分析中,通过二维截面上骨料截面信息测量试验和圆孔筛机械筛分试验结果的比较,建立一种现场推测骨料粒径分布的方法。试验结果表明在考虑骨料形状后二维截面测量方法推测结果良好,误差小于5%。
Coarse aggregate size distribution is important for the research on concrete strength analysis. Usually it can not be obtained without cutting a part of concrete down. A new method based on conditional probabilistic method is introduced. Application of “estimation of three-dimensional size distribution from two-dimensional section” is presented to direct estimation of three-dimensional size distribution. Analysis for a two-dimensional section using digital images is compared with the test of conventional mechanical sieving. The study demonstrates that this new method is a convenient and accurate technique for particle size distribution analysis.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第17期3107-3112,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展规划(973)项目(2002CB412709)
关键词
土力学
混凝土
骨料
二维截面
粒径分布
数字图像分析
筛分试验
soil mechanics
concrete
aggregate
two-dimensional section
size distribution
digital imageanalysis
mechanical sieving test
