What Is The Role Of Polypropylene Fibers in Concrete?

The role of polypropylene fiber in concrete has the following aspects:
1. Prevent shrinkage cracks from occurring when concrete shrinks. When polypropylene fiber is not used, the concrete needs to be watered to moisturize when drying to prevent cracks from appearing when it dries out and shrinks, requiring rework. However, adding polypropylene fiber can improve the toughness of the concrete and prevent cracks.
2. It can improve the fire resistance of concrete to a certain extent. When concrete is exposed to high temperatures, the moisture inside will vaporize directly on the surface, causing a certain amount of moisture to be lost inside the concrete, resulting in low fire resistance of the concrete. However, when polypropylene fiber materials are added, a lot of water will form inside the concrete at high temperatures. holes, moisture will shuttle along the holes, thus greatly improving the fire resistance.