This paper presents results of a pilot study carried out to investigate the feasibility and viability of producing a sustainable and eco-friendly structural strengthening solution involving the use of cement-free alkali-activated geopolymeric matrix and carbon fabric textiles. The study focused on examining the bond behavior at the fabric-geopolymeric matrix interface through single-lap shear tests. The geopolymeric matrix was a blend of fly ash/ground granulated blast furnace slag (GGBS) activated by an alkaline solution of sodium silicate and sodium hydroxide. Test parameters included the bonded length, configuration of the textile fabrics, and composition of the matrix. The bond behavior of the specimens with a geopolymeric matrix was characterized and compared to that of similar specimens with a cementitious matrix. All specimen exhibited a debonding mode of failure at the fabric-matrix interface. The bond strength of a specimen with a bi-directional fabric was higher than that of a similar specimen with a unidirectional fabric. The bond strength of the specimens with the geopolymeric matrix was even higher than that of similar specimens with the cementitious matrix. Increasing the fly ash-to-GGBS ratio in the geopolymeric matrix slightly decreased the bond strength but improved the post-peak behavior of the tested specimens.
|Journal||World Congress on Civil, Structural, and Environmental Engineering|
|Publication status||Published - 2019|
|Event||4th World Congress on Civil, Structural, and Environmental Engineering, CSEE 2019 - Rome, Italy|
Duration: Apr 7 2019 → Apr 9 2019
ASJC Scopus subject areas
- Civil and Structural Engineering
- Environmental Engineering