水力发电学报2016，Vol.35Issue(10)：112-120,9.DOI:10.11660/slfdxb.20161012
自密实混凝土在堆石孔隙中的流动规律研究
Flow behaviors of self-compacting concrete in rockfill gaps
摘要
Abstract
Filling effect of self-compacting concrete (SCC) in rockfill gaps is a crucial factor of rockfilled concrete (RFC) strength and engineeing safety.The flow of fresh SCC in rockfill gaps can be regarded as a particle-Bingham fluid two-phase flow that is particularly complicated due to its non-Newtonian rheological characteristics and the complexity of its passage.In this work,SCC flows in the pores of rockfill material was studied by coupling the lattice Boltzmann method and particle discrete element method.We found out that these flows can fall into three regimes:dilute flow,dense flow and jamming.Aperture ratio,or the ratio of pore outlet size to particle diameter,is the most important factor of the flow and its jamming effect.It is much easier for SCC to form dense flow or jamming flow if its volume fraction of particles is higher.For dense flows,a relationship of outlet flow rate versus aperture ratio was established,which could be used to improve fresh concrete pouring technique.关键词
水工结构/堆石混凝土/自密实混凝土/数值模拟/两相流/堵塞规律Key words
hydraulic structures/rock-filled concrete/self-compacting concrete/numerical simulation/two-phase flow/jamming law分类
建筑与水利引用本文复制引用
张传虎,金峰,陈松贵,徐小敏..自密实混凝土在堆石孔隙中的流动规律研究[J].水力发电学报,2016,35(10):112-120,9.基金项目
国家自然科学基金(51239006 （）
51509139 （）
11272048 （）
11572178) （）
国家高技术研究发展计划(863)(2012AA06A112) （863）
