10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), İstanbul, Turkey, 8 - 10 December 2021, vol.198, pp.763-773
The present paper demonstrates initial results from an ongoing experimental and analytical research programme on masonry structures confined with Textile Reinforced Mortars (TRMs). In the present experimental stage, three series of uniaxial tensile tests were conducted on TRM coupons having variables the types of fibres and the ambient temperature. The purpose of this experimental investigation is to examine the residual strength of Carbon, and Basalt fibre textiles, used for the preparation of TRMs, after having been exposed to elevated temperatures. Within the scope of the experimental programme, TRM coupons and single fibre yarns have been exposed to three different temperatures (100 degrees C, 200 degrees C and 300 degrees C) before tensile testing. Subsequently, parts of all specimens were subjected to Scanning Electron Microscopy (SEM) to assess any changes in the microstructure, both of the mortar and the fibres. Dogbone specimens were used to test the TRMs in tension, while prismatic specimens were used to assess the mortar's flexural tensile and compressive strength. For each temperature group, additional tensile tests were conducted on bare fibre yarns to assess changes in their mechanical properties. A significant decrease in the compressive strength of mortar observed between 20 degrees C and 100 degrees C, while there was a tendency for that value to increase gradually from 100 degrees C to 300 degrees C.