摘要
混凝土超高泵送主要由两方面因素决定:混凝土性能及泵送设施。在泵送设施确定后只能从混凝土配合比优化方面着手以实现混凝土的超高泵送。针对广州珠江新城西塔混凝土工程,阐述了混凝土配合比中粗骨料粒径和超细粉含量对超高泵送的影响。通过优化配合比,采用小粒径粗骨料,加入硅灰,降低泵送压力,以增强混凝土的工作性能,增加黏度和抗离析性。
Two factors which can influence the concrete’s ultra-high pumping are concrete’s performance and pumping facilities.If the pumping facilities’ type is limited,the optimization of concrete mix proportion is the sole way to achieve ultra-high concrete pumping.According to the concrete engineering in Guangzhou Pearl River New Town West-tower,the influence of coarse aggregate size and ultrafine powder in concrete mix proportion on ultra-high pumping is indicated.By optimizing mix proportion,applying small size coarse aggregate,adding silica fume,the pumping pressure of concrete is induced to strengthen concrete performance,and viscosity and anti-segregating are increased.
出处
《施工技术》
CAS
北大核心
2010年第12期12-13,26,共3页
Construction Technology
关键词
广州珠江新城西塔
泵送混凝土
粗骨料粒径
超细粉
影响研究
Guangzhou Pearl River New Town West-tower
pumping concrete
coarse aggregate size
ultrafine powder
influence study
作者简介
苏广洪，中国建筑第四工程局有限公司高级工程师，广州市天河区科韵路16号510620，电话：13527626721，E—mail：sgh19750626@126．com
