Creep behavior of RC slabs strengthened NSM CFRP laminate strips under differen...

• Author(s): Sena-Cruz, José ; Silva, Patrícia ; Fernandes, Pedro Miguel Gomes ; Azenha, Miguel ; Barros, Joaquim A. O. ; Sousa, Christoph ; Teixeira, Tiago André Nunes
• Date: 2013
• Persistent ID: http://hdl.handle.net/1822/25390
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Creep; NSM; Concrete; Aging tests
• Document Type: Conference Object
• Language: English

Description

With the aim of analyzing the long-term deformational performance of concrete elements flexurally strengthened with the near-surface mounted (NSM) technique, an experimental program has been launched using slab specimens submitted to sustained loads under the following environmental conditions: (i) 20ºC temperature and 55% relative humidity; (ii) immersed in water tank at 20ºC with 0% of chlorides; (iii) immersed in water tank at 20ºC with 2.5% of chlorides; (iv) submitted to wet/dry cycles at 20ºC with 2.5% of chlorides. The slabs are continuously monitored in terms of mid-span vertical deflection and strains (in concrete, CFRP laminate strip and steel reinforcements). The present paper summarizes the preliminary results obtained in this ongoing project.