EFFECT OF FILLER MATERIALS ON THE RHEOLOGICAL PROPERTIES OF FRESH CONCRETE

The present paper presents art experimental program that was carried out to investigate the effect of different types of filler material on the rheological properties of fresh concrete. The results showed that the different filler materials that had approximately the same particle-size distribution and consisted mainly of quartz, potassium feldspar, plagioclase feldspar, and ground limestone, respectively did not affect the rheological properties of the fresh concrete very much. However a partial replacement of the pier with biotite muscovite, and chlorite distinctly increased the yield stress, but did not change the plastic viscosity. The same effect was observed far an amphibole-type of material containing 15 percent biotite. Also, for the various concrete mires, the yield stress distinctly increased with time while the plastic viscosity was not affected during a period of 50 min.