Effect of Modifying Additives on Mechanical Properties of Refractory Concrete
AbstractThis experimental study presents the results of the combined effect of micro fibre and micro silica content on physical and mechanical properties of refractory concrete after exposure to high temperatures. A complex binder together with firestone aggregates was used for production of refractory concrete, which was reinforced simultaneously with micro fibre (1 wt % and 3 wt %) and micro silica (1.5 wt%, 3.5 wt% and 5 wt%). Unmodified concrete was produced as well. The results show that simultaneous modification with micro silica and micro fibre improves the flexural strength of the refractory concrete at all the temperatures investigated: 100°C, 600°C, 800°C and 1000°C. Contrary, the advantage of reinforcing agents on cold crushing strength of concrete was observed above 800°C. It was determined that the mechanical strength of the refractory concrete increases with the increasing content of micro silica and reduces with the increasing content of micro fibre.
Copyright terms are indicated in the Republic of Lithuania Law on Copyright and Related Rights, Articles 4-37.
The copyright for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open access journal, articles are free to use with proper attribution in educational and other non-commercial settings.