| Title |
Mechanical Properties of Mortar Reinforced with Fluorinated Polypropylene Fiber |
| Authors |
Yun Hyun-Do ; Lee Byouug-Ky ; Kim Do-Su ; Khil Bae-Su ; Nam Jae-Hyun ; Rho Jae-Seong |
| Keywords |
Fluorination ; Polypropylene fiber ; Shrinkage ; Crack control |
| Abstract |
Reinforcement of concrete with randomly distributed short fibers may improve the toughness of cementitious matrices by preventing or controlling the initiation, propagation, or coalescence of cracks. The fibers used are mainly steel fibers, carbon fibers, and polymer fibers. Among the polymer fibers, polypropylene fibers have attracted most attention due to the outstanding toughness of concrete reinforced with them. In order to improve the bond strength of polypropylene, various fluorination methods were applied to modify the surfaces of polypropylene fibers.??The effect of the modification of polypropylene fiber surface on the shrinkage and mechanical properties was investigated. Test results indicated that with use of fluorinated polypropylene fiber, it promotes stability strength or flexural strength rather than the specimen added the general mortar and polypropylene fiber. The results showed that resisting on the crack is 97% in the mortar and over 50% than the general polypropylene fiber. fluorinated polypropylene fiber mortar will be used to construct in contacting with outsides like external wall finish and it will promote workability and durability or crack resistance. |