Application Of Polypropylene Fiber in Wall Cement Mortar Plastering

1. What's the advantages of Polypropylene fiber？

Polypropylene fiber is also called polypropylene, it has the advantages of convenient construction, low cost, chemical corrosion resistance, etc., as a reinforcing material incorporated into cement mortar, can reduce the mortar in the hardening process of microcracks, and prevent or delay its expansion, thereby effectively improving the tensile strength of mortar." But polypropylene . The fiber has a smooth surface, low surface energy, no active groups on the molecular chain, and a hydrophobic surface, resulting in poor adhesion to the cement matrix1-31. At the same time, due to the existence of a large number of pores inside the polypropylene fiber reinforced cement mortar, the interface contact between cement hydrate, polypropylene fiber and aggregate is insufficient, which reduces the durability of the cement mortar, which affects the application effect of polypropylene fiber in cement-based materials and restricts its application range 145. Therefore, a certain amount of polymer emulsion was added to modify the polypropylene fiber cement mortar in this experiment, in order to improve the interface bonding performance between polypropylene fiber and cement mortar matrix, improve the flexural strength of mortar, and improve its impermeability.
Polypropylene fiber can effectively improve the crack resistance of concrete (mortar). The test shows that the plastic crack of 0.9kg/m3 polypropylene fiber reinforced mortar is less than that of ordinary mortar and less than 80%. When the thickness of exterior wall plastering is 2cm, the additional cost of adding polypropylene fiber per 1m2 of exterior wall plastering does not exceed 1 yuan. Therefore, polypropylene fiber reinforced mortar is particularly suitable for plastering lightweight wall materials such as hollow blocks, lightweight bricks, aerated concrete, etc. Effectively improve the crack resistance of the damping layer of the exterior wall, make up for the lack of impermeability of lightweight wall materials, and appropriately reduce or eliminate the hanging net to save materials and reduce costs.

2. Application Of Polypropylene Fiber

In the Atlas of Architecture (Volume A), polypropylene fibers are recommended for "roof waterproofing", "underground waterproofing", "toilet, bathroom and kitchen waterproofing", "exterior wall waterproofing", "pool waterproofing" and other rigid waterproofing layers (fine stone concrete, sandpaper pulp); It can be used as both a screed layer and a waterproof layer, which solves the problem of leakage and cracks in the exterior wall to a certain extent. Polypropylene suppliers Mortar doped with polypropylene fibers can also be used to repair cracks and fill the gaps between window frames and walls. Fiber concrete is widely used as a rigid waterproof roof. In addition to structural functions, this roof has good crack resistance, waterproofing and abrasion resistance.