1. Non-conductive
In modern projects, such as subways, tunnels, electrified railways, and industrial plants, etc., all have high requirements for insulation. In the reinforcement of these projects, aramid fiber has an absolute advantage, which also provides a The best choice opportunity.
2. Good corrosion resistance
In particular, it is resistant to strong alkali corrosion, which is incomparable to other FRP composite materials. Due to the strong corrosion of concrete structures in seawater, mainly because it contains more chloride ions, it causes carbonization of concrete and corrosion and expansion of steel bars. Therefore, in the reinforcement and protection of some seaport terminal projects, aramid fiber is the best choice.
3. Good impact resistance
Because the elastic modulus of aramid fiber is 118Gpa, the ductility is particularly good, and its elongation is 1.8%, so it was initially used as a military product abroad, such as bulletproof vests. Use it to reinforce some structures with strict impact requirements, such as the pier of the main channel.
4. Good resistance to dynamic load and fatigue
Although the tensile strength of carbon fiber is very high, because it is a brittle material, it can only withstand long-term static load. If it is subjected to long-term dynamic load, its strength cannot be guaranteed. Aramid fiber is not subject to this limitation. Early It is mainly used in military products and is the main material of body armor. Due to its good toughness, its corresponding fatigue resistance is very good. In addition, the shear resistance of aramid fiber is also the strongest of all FRP materials.
5. Easy construction
Mainly the following steps, surface treatment-brushing primer-bottom impregnating resin--pasting aramid cloth-outer impregnating resin-surface protection, and the operation is very simple. There is no need for large lifting machinery and equipment, generally no chamfering is required. The chamfering of the square column can be done as long as 10ram, because aramid is an organic material, it has good wettability with resin, and the curing time is very short. It is a few hours, while similar other fibers require one to two weeks.
