Experimental study of the thermomechanical behavior of the carbon textile reinforced refractory concrete subjected to the constant load and temperature heating

Abstract

The carbon textile reinforced refractory concrete is an alternative material to strengthen or reinforce the structure in an elevated temperature environment or usually subjected to fire. This composite is one perfect combination of carbon textile reinforcement which ensures high capacities (mechanical strength and stiffness) at elevated temperature, and refractory concrete matrix which ensures thermal protection and loading retransmission into textile reinforcement. The aim of this paper is to identify the rupture temperature and exposure duration of carbon TRC in thermomechanical condition. This paper presents original experimental results on carbon TRC specimens subjected to 5 applied force levels (from 10% to 75% in comparison with the maximal strength of this material at room temperature) and temperature increasing. As results, the studied carbon TRC specimen can exhibit up to the temperature of 670 °C in 23 minutes corresponding with an applied force level of 50%. The rupture temperature and exposure duration of carbon TRC decreased progressively with increasing of applied force level. In comparison with the experimental result on carbon textile specimen, the contribution of the refractory matrix as thermal protection was found and analyzed. The exposure duration of the carbon TRC in case of fire could be calculated thanks to the temperature heating curve according to the standard ISO – 834.