LAUSR

The present study aims at experimentally investigating the applicability of Ternary Blended Concrete (TBC) with Perlite Powder (PP) and Silica Fume (SF) as a partial replacement material which would offer resistance to elevated temperatures. In this direction, keeping the content of SF constant at 10%, four different TBC mixes were prepared by varying the content of PP from 1 to 7% with an increment of 2%, in addition to control concrete. The specimens, after being properly cured, were subjected to elevated temperatures in the range of 200–800 °C in steps of 200 °C, followed by air-drying. Experimental procedures like compression test, TGA-DTA, and XRD analysis were carried out. The results of these analyses show that TBC mix with 5% replacement of PP at 400 °C exhibited the highest strength and better thermal properties. An increased residual strength of about 30% was observed at 800 °C. Thermal analysis shows weight losses of 9.677%, 7.530%, and 1.596%, respectively, in the three phases of 5% PP is more, which is due to the presence of high pores. It is recommended that TBC with 5% PP and 10% SF be used as a good composite material with resistance to high temperatures.