TY - JOUR
T1 - Experimental evaluation of interface adhesion of a flax fiber composite patch with epoxy and polyurethane adhesives for the reinforcement of steel structures
AU - Tazi, Mohamed Amine
AU - Lima, Rosemere de Araujo Alves
AU - Silva, Enio Henrique Pires da
AU - Jebli, Mouad
AU - Freitas, Sofia Teixeira De
AU - Casari, Pascal
AU - Barros, Silvio de
PY - 2023
Y1 - 2023
N2 - Using fiber-reinforced composite patches for repairing damaged structures made of metal or/and concrete is an interesting and widely available solution on the market using synthetic materials. These repairing patches are bonded on the structures’ surfaces to increase their strength against internal stresses, as well as protect them from external physico-chemical attacks, thereby limiting crack propagation. Natural fibers offer a potential alternative to replacing glass or carbon fibers commonly used for bonded repair patches. Similarly, bio-based polymers represent an important sustainable alternative for partially or entirely replacing the petroleum-based polymers. In this study, an epoxy matrix reinforced with flax fiber is proposed as the material for the patches, and bonded to a steel plate using four different types of adhesive materials, including a castor-oil derived polyurethane resin. Floating roller peel tests were performed to assess the adhesion and viability of these new patches. The resulting peeling loads and fracture surface analysis are presented. Polyurethane demonstrates promising performance for epoxy-to-steel joints, but major improvements of the bio-based polyurethane application process and curing conditions may be necessary for its successful industrial implementation.
AB - Using fiber-reinforced composite patches for repairing damaged structures made of metal or/and concrete is an interesting and widely available solution on the market using synthetic materials. These repairing patches are bonded on the structures’ surfaces to increase their strength against internal stresses, as well as protect them from external physico-chemical attacks, thereby limiting crack propagation. Natural fibers offer a potential alternative to replacing glass or carbon fibers commonly used for bonded repair patches. Similarly, bio-based polymers represent an important sustainable alternative for partially or entirely replacing the petroleum-based polymers. In this study, an epoxy matrix reinforced with flax fiber is proposed as the material for the patches, and bonded to a steel plate using four different types of adhesive materials, including a castor-oil derived polyurethane resin. Floating roller peel tests were performed to assess the adhesion and viability of these new patches. The resulting peeling loads and fracture surface analysis are presented. Polyurethane demonstrates promising performance for epoxy-to-steel joints, but major improvements of the bio-based polyurethane application process and curing conditions may be necessary for its successful industrial implementation.
KW - Peel tests
KW - Adhesion
KW - Biobased adhesives
KW - Flax fibers
KW - Bi-material joints
UR - http://www.scopus.com/inward/record.url?scp=85181665567&partnerID=8YFLogxK
U2 - 10.1016/j.ijadhadh.2023.103559
DO - 10.1016/j.ijadhadh.2023.103559
M3 - Article
SN - 0143-7496
VL - 129
JO - International Journal of Adhesion and Adhesives
JF - International Journal of Adhesion and Adhesives
M1 - 103559
ER -