EXPERIMENTAL STUDY ON MIXING AND PROPERTIES OF ULTRA HIGH STRENGTH CONCRETE ON THE PLANT(Materials and Construction)

Abstract

Ultra high strength concrete with silica fume was manufactured in a normal ready-mixed concrete plant. Properties of fresh ultra high strength concrete including minimum power load of mixer at discharge, slump flow and 50-cm flowing time were measured and discussed in terms of water-cement ratio, dosage of superplasticizer and mixed-up temperatures. It was proven to be possible for conventional ready-mixed plants to manufacture an ultra high strength concrete with favorable early-age properties up to 120 minutes after mixing.