C50自密实补偿收缩混凝土配合比试验研究  

Experiment Study of C50 Self-Compacting Compensation Shrinkage Concrete Mix Proportion

作　　者：李影丛 LI Yingcong(The 2nd Engineering Co.,Ltd.of China Railway 16th Bureau Group,Tianjin 300100,China)

机构地区：[1]中铁十六局集团第二工程有限公司,天津300100

出　　处：《北方建筑》2023年第1期28-32,共5页Northern Architecture

摘　　要：本文首先阐述了自密实混凝土具有的优点及缺点,并结合新建赣州到深圳铁路跨国道G205特大桥工程96 m系杆拱桥自密实混凝土施工经验,研究最优的C50自密实补偿收缩混凝土配合比。研究发现外掺料的掺量对自密实混凝土的性能影响较大。通过改变外掺料的掺量,对C50自密实混凝土进行配合比设计。根据试验数据对比,得出外掺料掺量为8%时的配合比为最优的C50自密实补偿收缩混凝土配合比。通过对该配合比的研究,提高了该工程的经济效益,为后续同类型混凝土的施工提供了经验。This paper first expounds the self-compacting concrete has the advantages and disadvantages,and then combined with the construction experience of 96 m tied arch bridge of G205 Super Bridge of Ganzhou to Shenzhen Railway,the optimal mix proportion of C50 self-compacting shrinkage-compensating concrete is studied.It is found that the amount of admixture has a great influence on the performance of self-compacting concrete.By changing the amount of admixture,the mix proportion of C50 self-compacting concrete is designed.According to the comparison of test data,the optimum mix proportion of C50 self-compacting shrinkage compensating concrete is obtained when the admixture content is 8%.Through the research of the mix proportion,the economic benefit of the project is improved,and the experience is provided for the following construction of the same type of concrete.

关 键 词：C50自密实补偿收缩混凝土 外掺料掺量 配合比 

分 类 号：U444[建筑科学—桥梁与隧道工程]