The effect of granite filler on the rheological properties of fresh mixture of cement composites

Abstract

This paper describes the use of granite filler produced during cutting, grinding and polishing of decorative stone. It mainly focuses on the consistency and workability of the fresh mixture in case of the cement substitution by granite filler. The comparative tests are carried out according to European standards dealing with fresh mortars and fresh concrete. The substitution of cement by granite filler is in multiples of 5% and 10% of the cement weight respectively. All results are also compared with a reference sample without granite filler. The results of flow table confirmed that workability and consistency decreased as the amount of granite filler increased. Altough this phenomena was also confirmed by spread flow test, specimens with 5 and 10% cement substitution had a better rheological properties. This phenomena was probably caused by improve of grain size curve of fresh mortar.