TRM versus FRP: Can cement-based matrices replace organic binders in the flexural strengthening of reinforced low-grade concrete beams?
Year: 2025
Type: article
Abstract: The rehabilitation of existing housing estates has become a crucial issue in recent years due to the deterioration of concrete structures caused by aging, environmental degradation, poor design, and lack of maintenance. To address these challenges, Fibre Reinforced Polymers (FRP) have been widely researched and applied in the construction sector. However, FRPs present several drawbacks, including incompatibility with certain substrates, inability to perform under extreme temperatures, and vulnerability to moisture. These limitations are especially problematic when strengthening low-grade concrete and masonry structures. As a potential solution, Textile Reinforced Mortar (TRM), which replaces the organic matrix of FRP with cement-based mortars, has garnered attention as a more durable and effective alternative.This study investigates the substitution of organic binders with a custom-designed cement-based mortar in TRM composites. Twelve reinforced concrete one-third scale beams (1.5 m span) were tested under a four-point flexural loading system to evaluate the performance of TRM compared to traditional FRP retrofitting techniques. The beams were retrofitted using both steel and carbon textile reinforcements, and a comparative analysis was conducted to assess their mechanical properties, including load-bearing capacity and ductility. The experimental results demonstrated that TRM composites enhanced the structural behaviour of the tested beams, with the cementitious-based composite demonstrating particular efficacy when steel textiles were used.The findings of this study highlight the potential of TRM as a reliable strengthening solution for low-grade concrete structures. The use of cement-based mortars offers significant advantages in terms of compatibility, durability, and cost-effectiveness, making it an ideal alternative to traditional FRP systems. These results contribute to the growing body of knowledge on the application of TRM in structural rehabilitation and offer valuable insights for future research and practical applications in the field of construction.
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,660
OpenAlex ID: W4411440891