Polypropylene fibre special material for concrete

Abstract

The invention discloses a specific material of concrete polypropylene fiber, which comprises the following parts: 100% polypropylene, 2-10% modifier, 0.01-0.2% anti-oxidant, 0.03-3% optical stabilizer. The fiber possesses permanent affinity with concrete base, which displays excellent dispersity to avoid contraction greatly.

Description

Background technique [0001] Concrete is an excellent building material, which is widely used in construction projects due to its high compressive strength, good durability and low cost. However, there is a major defect in concrete, namely its poor crack resistance, impermeability, impact resistance and wear resistance. In the 1970s, fiber-reinforced cement-based composite materials were developed, including steel fibers, glass fibers, synthetic fibers, especially polymer fiber materials, which are more and more widely used in cement concrete. Because polypropylene fiber is an inert material, it can be widely used, cheap, light in weight, especially has good chemical resistance, no moisture absorption, and small shrinkage and creep, so its application in building materials has attracted attention abroad. In addition, asbestos is a carcinogen, and the world's production is limited. Using polypropylene fiber instead of asbestos has improved strength and durability. [0002] Com...

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is that the polypropylene fiber for domestic concrete is limited to the modification of the fiber itself, and its performance is far inferior to that of similar foreign products, and some are even worse than ordinary fibers; Technical problems such as aging resistance and other properties that cannot meet the use requirements of concrete