The effect of calcite and blast furnace slag on the rheology properties of self-compacting concrete in meso and macro scales

  • Murat Gökçe Architecture Faculty, Architecture Department, Amasya University, 05100, Amasya (Turkey)
  • Osman Şimşek Faculty of Technology, Civil Engineering Department, Gazi University, 06560, Ankara (Turkey)
Keywords: calcite, blast-furnace slag, plastic viscosity, meso and macro scale interaction, Bingham model, self-compacting concrete


In this study, the effects of blast furnace slag (BFS) and calcite on rheological properties of self-compacting concrete (SSC) in meso and macro scales were investigated. During the preparation of replicate samples, while BFS was replaced with the cement at the rate of 10%, 20%, 30%, and 40% by weight, calcite was added to the cement at the rate of 10%, 15%, 20%, and 25% by weight. The rheological properties (plastic viscosity and yield point) and mini-slump flow values of the cement paste prepared in meso scales were determined. The fresh flow consistency of concrete prepared in macro-scale was tested with L-box flowing test. As a result, upon evaluating the rheological parameters of the pastes according to the Bingham model, while the pastes with a plastic viscosity value close to 1 Pa·s (±100 MPa·s) and a mini-slump flow rate higher than 200 mm were observed to be more resistant to segregation and form a homogeneous flow consistency, their L-box flowing rates were determined to be homogeneous and high. Ideal SSCs were made by adding 20% and 25% calcite to 30% BFS and 40% BFS replaced mixtures respectively in this study. It was also concluded that ideal SCC could be produced with paste mixtures having 1 Pa·s (±100 MPa·s) viscosity and mini-slump flow diameter higher than 200 mm. With the increase in calcite addition rates in SSCs, the passing rate for the L box test has increased.

Author Biographies

Murat Gökçe, Architecture Faculty, Architecture Department, Amasya University, 05100, Amasya (Turkey)

Architecture Faculty, Architecture Department, Amasya University

05100, Amasya (Turkey)

Osman Şimşek, Faculty of Technology, Civil Engineering Department, Gazi University, 06560, Ankara (Turkey)

Faculty of Technology, Civil Engineering Department, Gazi University

06560, Ankara (Turkey)


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