A STUDY ON MIXTURE DESIGN AND QUALITY CONTROL METHOD OF HIGH FLY ASH CONCRETE

Abstract

Fly ash-Cement mixture mixed at low water content close to optimum moisture content is only wet powder immediately after mixing. After going through vibration compaction for a few minutes the wet powder becomes fluidized and can be sufficiently compacted. By applying this fluidized phenomenon for manufacturing, water to powder ratio and cement content can be reduced. So quality and cost efficiency of high fly ash concrete can be improved.
In this study the authors investigated the method of mixture design and quality control of high fly ash concrete. From the investigation, it was found that the optimum mixture can be determined by the flow tests of fly ash and quality of high fly ash concrete can be controlled by the fluidization time.