Author/Authors :
Bakhtiyari، S. B. نويسنده , , Allahverdi، A. نويسنده Iran University of Science and Technology Allahverdi, A. , Rais-Ghasemi، M. نويسنده Iran University of Science and Technology Rais-Ghasemi, M. , Ramezanianpour، A. A. نويسنده Professor, Department of civil engineering, Amirkabir University of Technology, Tehran, Iran. Ramezanianpour, A. A. , Parhizkar، T. نويسنده Assistant Professor, Building and Housing Research Center of Iran,Tehran, Iran , , Zarrabi، B. A. نويسنده Fire Technology Dept., SP Technical Research Institute, Sweden Zarrabi, B. A.
Abstract :
Self Compacting Concrete (SCC) specimens with limestone (L) and quartz (Q) powders were formulated. The influence of the type
of the powder on the properties of fresh and hardened concrete was evaluated. Dense packing theories were used for mix design
of samples. The equation of Fuller and Thompson for particle size distribution (PSD) of aggregates was modified with considering
fine particles and a proper PSD curve was obtained for SCC. Experimental results showed that this method needs use of less
powder content and results in higher strength/cement ratio compared to traditional mixing methods. No significant difference was
observed between the compressive strengths of specimens containing limestone (L-specimens) and quartz (Q-specimens) powders,
with similar proportions of materials. The residual compressive strength of specimens was examined at 500°C and contradictory
behaviors were observed. One Q-specimen suffered from explosive spalling, while no spalling was occurred for L-specimens. On
the other hand, the residual strength of remained Q-specimens showed considerable increase compared to L-specimens. The results
show the necessity for more detailed investigations considering different effective parameters.
