Application and construction technology of Engineering polypropylene fiber
Polypropylene fiber is a kind of high-strength bundle monofilament fiber made from polypropylene by production process. Adding concrete or mortar can effectively control the micro cracks caused by the solid plastic shrinkage, dry shrinkage, temperature change and other factors of concrete (mortar), prevent and restrain the formation and development of cracks, greatly improve the crack resistance, impermeability, impact resistance and seismic resistance of concrete, and can be widely applied to the waterproof of underground projects, roofs, walls, floors, pools, basements of industrial and civil construction projects, And roads and notes: the length range is 3-50mm, which can be produced according to customer requirements.
Polypropylene fiber for engineering is made from polypropylene through special process. Commonly used polypropylene engineering fibers can be divided into monofilament and reticulation. Mesh fiber monofilament fiber monofilament polypropylene fiber is a kind of high-strength polypropylene bundle monofilament fiber. Through special surface treatment technology, the dispersion of the fiber in the concrete and the grip and wrapping force with the cement body are ensured. It is generally applicable to fine aggregate concrete. The appearance of reticular polypropylene fiber is a reticular structure formed by the interconnection of multiple monofilaments. When the polypropylene mesh fiber is put into the concrete, during the concrete mixing process, the transverse connection between the fiber monofilaments is destroyed by the kneading and friction of the concrete itself, forming the fiber monofilament or mesh structure to fully open, so as to achieve the effect that a large number of polypropylene fibers are evenly mixed into the concrete.
The quality of concrete mixed with polypropylene fiber has been improved, and the comprehensive service performance has been improved. It has the characteristics of simple addition process, low price and excellent performance.
I. crack prevention: adding a certain amount of crack prevention fiber into mortar / concrete will increase the crack resistance by more than twice. It can effectively improve the temperature stress of mortar / concrete Plastic shrinkage Crack resistance caused by shrinkage, etc. The mix proportion is reasonable Under the condition of construction specifications, cracks can be completely prevented
II. Impermeability: it can effectively improve the anti-seepage and moisture-proof function of mortar / concrete. In general, adding crack proof fiber can improve the impermeability of concrete. It is an effective waterproof material.
Three impact resistance: after infiltrating crack proof fiber, the impact resistance of concrete can be greatly improved.
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