Polypropylene engineering fiber
Relying on its own product quality and its position and influence in the dry powder building materials additive industry, Shandong chuangyao Chemical Co., Ltd. is now cooperating with international and domestic famous manufacturers on the premise of always maintaining the quality first enterprise mission. The supporting polypropylene engineering fiber is a short cut organic fiber made of polypropylene and other materials through special processes. It is alkali, acid and water resistant It has high chemical stability.
Polypropylene short fiber can improve the crack resistance, impact wear resistance, impermeability, explosion resistance, frost resistance and workability of concrete / mortar. Tens of millions of polypropylene fibers are evenly distributed in concrete / mortar, which plays a good role in micro reinforcement, so as to maintain the integrity of the material structure, avoid the structure from being scattered into many pieces when it is damaged by impact, prevent the corrosion of steel bars in the structure, greatly extend the service life of the building, and reduce the maintenance cost of the building.
1、 Application fields:
1. Cement mortar: internal (external) wall painting, aerated concrete plastering, interior decoration putty and thermal insulation mortar.
2. Anti explosion and fire-resistant Engineering: civil air defense military engineering, oil platform, chimney, refractory, etc.
3. Shotcrete: tunnel, culvert lining, thin wall structure, slope reinforcement, etc
4. Concrete rigid self waterproof structure: basement floor, side wall, roof, roof cast-in-place floor, water reservoir, etc. Anti crack, anti impact, anti abrasion, high demand engineering, water conservancy engineering, subway, airport runway, port wharf, overpass bridge deck, pier, super long structure, etc.
Polypropylene short fiber, with unique excellent dispersion, completely solves the problem of fiber mixing in concrete / mortar is not easy to disperse, ensures the best quality of fiber concrete / mortar, and wins the approval of the majority of concrete / mortar users.
2、 Usage:
Relatively speaking, the higher the parameter is, the better the crack resistance effect is. Different parameters are selected according to the requirements of the project. Fiber plays a role of reinforcement in concrete. The fiber itself is an inert material and will not react with other concrete / mortar components and admixtures. The parameters of the fiber will not change the ratio of the original concrete / mortar, and there is no special requirement for the performance indexes of various aggregates.
1. Feeding sequence and method: when in use, the fiber, sand, stone and other aggregates are added at the same time, and then the water is added to mix. It is better to mix the fiber in the sand and stone while adding the sand and stone.
2. Fiber concrete mixing: the mixing time is about 30 seconds longer than that of the concrete without fiber, so as to ensure that the fiber can be evenly mixed in the concrete. (it is not necessary to extend the mixing time of commercial concrete mixing plant for high dispersive products)
3. Special mortar and other products that need to be premixed can be premixed together with other powders and then mixed together with powders.
3、 Reference parameters:
Add 0.6-0.8kg fiber per cubic meter of concrete, and select 12-19mm.
Add 0.9-1.2kg fiber size 6-19mm per cubic meter of mortar with thick plastering layer, and 6-10mm for mortar with thin plastering layer (the original ratio of concrete / mortar is unchanged)
4、 Strength test
The addition of fiber will not affect the strength of concrete, but the strength test of fiber concrete shall be carried out for the determined concrete mix proportion before the use of each project.
5、 Slump adjustment
Because of the thickening effect of the fiber, the addition of the fiber will increase the viscosity of the concrete mixture and slightly reduce the slump.
Each project needs different slump, so adjust the slump by experiment before using the project. If the slump can not meet the construction requirements, do not increase the amount to increase the slump, but properly use plasticizer or water reducer to improve the slump to meet the construction requirements.
6、 Finish pressing
The primary surface pressing shall be carried out immediately after the concrete is discharged from the formwork, and the secondary surface pressing shall be completed before the completion of the initial setting of the concrete. In addition, steel or iron trowel shall be used as much as possible when pressing the surface. If the wood is not smooth enough, the fiber will be hooked out.
7、 Forming and maintenance
Concrete mixed with fiber does not need special care when forming, but it should be fully vibrated. It is not allowed to relax the early maintenance of concrete by adding fiber.
8、 Special instructions and precautions for use:
Fiber is only used as the "secondary reinforcement" of concrete. Its main function is to suppress the concrete cracks, improve the basic impermeability of concrete, and extend the service life of concrete, rather than the "main structural stress reinforcement". It can not be used as structural reinforcement material, but as a secondary reinforcement. Structural reinforcing materials (such as reinforcing bars) cannot be replaced. Do not use it alone to solve the situation of settlement and strong external force impact. Do not reduce the size of the main structure due to the use of fibers. The construction and maintenance of the used fiber shall be carried out in strict accordance with the relevant national specifications and practices.
9、 Package specification:
20 kg / bag (20 packets), to prevent long-term sunlight exposure.
