Behavior of concrete strengthened with carbon fiber reinforced polymer laminate at high temperature

Abstract EN

In this paper the effect of high temperature on plain concrete strengthened with Carbon Fiber Reinforced Polymer (CFRP) sheets and behavior of concrete strengthened after heating were studied for flexure and compression properties.

For this purpose a total of 44 prismatic specimens of 100x100x350 mm dimensions were tested.

Results indicate that due to high temperature there is a continuous reduction in flexural strength of concrete strengthened with CFRP sheet.

Deflection corresponding to flexural strength also reduced for exposure temperature higher than 350°C.

The effect of finishing CFRP layers with cement mortar for controlling the reduction of flexural and compressive strengths due to high temperature was found to be not important.

According to the obtained results, plain concrete damage by high temperature can be repaired using CFRP sheets for compressive strength of about 74% of that of plain concrete, and flexural strength of about 69% of that of strengthened concrete before heating.