Investigation into viability of using two-stage(pre-placed aggregate)concrete in Irish setting  

作　　者：John O’MALLEY Hakim S.ABDELGAD 

机构地区：[1]Dublin Institute of Technology,Dublin,Ireland [2]Department of Civil Engineering,Al-fateh University,Tripoli,Libya

出　　处：《Frontiers of Structural and Civil Engineering》2010年第1期127-132,共6页结构与土木工程前沿（英文版）

摘　　要：Two-stage(pre-placed aggregate)concrete(TSC)consists of coarse aggregate,which is first deposited into the formwork,and grout,which is later pumped into the formwork from the bottom up to bind the stone together into a monolith.During the course of this study the formation of grout for two stage concrete was investigated using readily available 5 mm sand mixed in a slow speed paddle mixer.Silica fume and a superplasticizer were used in the mix to see if the necessary stability and fluidity could be achieved without the use of a specialized plant,essentially to see if TSC could be produced on a small scale using native Irish aggregates.A much higher degree of sedimentation was recorded during testing than was expected.As a result,the use of 5 mm sand and a slow speed mixer in combination were found to be not conducive to the successful production of TSC grout,without further research and testing.

关 键 词：GROUT pre-placed CONCRETE two-stage concrete(TSC) 

分 类 号：TU5[建筑科学—建筑技术科学]