Abstract
This paper reports test results of mixing method applying forced-mixing type mixer for the purpose of reducing mixing time of ultra high strength fiber reinforced concrete. From some test results, it was investigated that the mixing time with that type mixer could be reduced less than 50% comparing with that of ordinary type mixer by setting up the mixing speed and product of circumferential speed of two type of shafts appropriately. Also it was investigated that the qualities of the mixing concrete applying that type mixer in short time were satisfied with required qualities.
