Mechanical and Shrinkage Behaviors of Ductile Fiber-Reinforced Polymer Repair Mortar

Abstract:

Repair mortar (RM) with dense texture and high anti-crack is cost-effective for application onto the surface of concrete structure to effectively delay the detachment of concrete protective layer and the corrosion of steel bars. Here, the effects of ductile fiber and polymer latex on the flexural strength (f_t), compressive strength (f_c), bond strength (f_b), and shrinkage rate (δ_r) of fiber-reinforced polymer repair mortar (FP-RM) were comprehensively studied. Results show, the individual doping of polymer latex can improve the f_t, f_b, and the toughness (the f_t/f_c ratio) of P-RM, and the f_b is increased by 75.78% with respect to the plain mortar, which imply polymer ingredient is essential to P-RM. Some ductile fibers individual dosage also can enhance the f_t, f_c, and δ_r of F-RM, respectively; When the polymer latex and ductile fiber are simultaneously doped into the FP-RM mortar together, the f_t and f_b of FP-RM can be increased up to 9.4MPa, and 2.52MPa, respectively, in tandem with 40.54% reduction of δ_r, showing superior synergy effect.

• Periodical: Key Engineering Materials (Volume 841)
• Pages: 14-19
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.841.14
• Online since: May 2020
• Authors: Gu Yue Han, Jian Lin Luo*
• Keywords: Bonding Behavior, Ductile Fiber, Mechanical Strength, Polymer Latex, Repair Mortar, Shrinkage Rate

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