Polypropylene Fiber in Concrete: Top 5 Benefits for Your Construction

Concrete ranks among the most used construction materials in these years. However, traditional concrete is prone to cracking and deterioration over time. It may also not be suitable for harsh environmental conditions and high-stress applications.


To address these challenges, fiber-reinforced concrete (FRC) has been introduced to the market. Various types of fibers are used in FRC. Polypropylene fiber stands out as a popular choice due to its excellent performance.



I. What is Polypropylene Fiber?

Polypropylene fiber is also known as pp fiber. It is a type of synthetic fiber used in construction materials. PP fiber is referred to as imitation steel fiber or plastic steel fiber. It is made from polypropylene and polyethylene through special manufacturing processes. It exhibits excellent dispersibility and adhesive properties when mixed with cementitious materials.


PP fiber combines the functionalities of steel fibers with the advantages of synthetic fibers. It is used to replace welded metal grids and steel fibers in concrete panel structures.



1.1 Polypropylene Fiber Uses

Polypropylene fibers contribute to the excellent performance of concrete. They are primarily used in concrete panel structures. Also, the reinforcement and localized reinforcement of concrete structures.


Top 4 Polypropylene Fiber Properties

1. High strength.

2. High modulus.

3. Low elongation.

4. Eco-friendly


PP fiber is used for crack resistance reinforcement in concrete. It retains the characteristics of traditional concrete fibers. Plus, it improves the workability and dispersibility of fibers in concrete. This enables a more uniform distribution of the main loads of the concrete structure.


1.2. 80% of PP Fiber Serves In

Highway pavements.

– Bridge decks.

– Airport runways.

Building floors.

High-rise buildings.





II.What is Fiber Concrete?

Polypropylene fiber concrete is also called pp fiber concrete. PP fiber concrete is a type of concrete that has many benefits. It’s lightweight, strong against pulling, resistant to impacts, and can resist cracks. The tensile strength of PP fiber is higher than general concrete. However, its elastic modulus is relatively low.



2.1 Effect of Polypropylene Fiber in Concrete

In fiber-reinforced concrete, cracks only form when the tension in the concrete surpasses the strength of the fleeces. Longer fibers create stronger bonds with the paste, enhancing their ability to resist pulling out. However, overly long fibers can be challenging to distribute evenly. Short fibers are better suited for smaller or lighter aggregates.


1. Crack Resistance

Polypropylene fiber reinforced concrete is known for its high strength and high-temperature resistance. PP fiber concrete can provide more reinforcement and bridging effects. Moreover, it is easy to work with and does not damage equipment.


Adding PP fiber to concrete can also help achieve slower bleeding. This means a slower rate of drying. So, there’ll be less plastic shrinkage cracking in your concrete.




2. Dynamic Loads Resistance

Research and engineering practice has shown the importance of PP fiber. The addition of fibers to concrete does not significantly improve its compressive, tensile, and flexural strength. But, it can enhance the concrete’s impact resistance and dynamic properties such as fatigue.


Polypropylene concrete fiber can suppress the generation of penetrating cracks and decrease the concrete’s porosity. It enhances the compactness and waterproof performance of concrete.


In other words, PP fiber improves concrete’s resistance to dynamic loads. It also benefits the durability of the concrete. It can inhibit early cracking. And prevent further expansion of microcracks in concrete. As a result, reducing shrinkage cracks.



3. Durable and Protective

Four Key Defense Properties of PP Fiber Concrete

1. Wind erosion resistance. PP fiber concrete withstands abrasive wind forces. Ensuring long-lasting structures and integrity over time.


2. Corrosion resistance. PP fiber concrete shields against moisture and chemicals, remaining durable and strong even in harsh environments prone to corrosion.


3. Acid and alkali resistance. PP fiber concrete stays stable. It is resilient in chemically challenging conditions. This feature offers reliability and longevity to your concrete.


4. Anti-magnetic rust properties.


P3 19 1


4. Eco-Friendly

PP fiber concrete can prevent concrete carbonation. It offers a sustainable solution for construction projects. As a result, this type of concrete lowers waste over the lifespan of the structure.



5. Reduce Stress Concentration

PP fiber concrete helps prevent small cracks from spreading by dispersing stress. It also prevents them from connecting to form larger cracks. If cracks do form, the fibers intersect with them, weakening or stopping their growth. Additionally, PP fiber helps control how cracks develop in the concrete.





2.2 Polypropylene Fiber Concrete Mix Design

Polypropylene fibers aid in reducing shrinkage and controlling cracking in concrete. No special equipment or slump modifications are needed to use these fibers. Even if you are going to use them for pumping or shotcrete applications.


Proper proportioning is essential for the effective application of polypropylene fiber concrete. The addition of PP fibers enhances concrete through physical reinforcement. So, there’s no need to be concerned about altering the concrete’s design mix. Here are some key points to consider when designing PP fiber concrete:



2.2.1 PP Fiber – Length Selection

In general, carbon reinforcement fiber lengths of 25-60mm are recommended.



2.2.2 PP Fiber – Proportion Design

A dosage of 5-6kg of carbon reinforcement fibers is suitable for single-side concrete applications. For applications like bridge deck waterproofing, the dosage may be doubled. The quantities of other materials need not be adjusted.



2.2.3 PP Fiber Concrete Mixing Method

The reinforcement fibers have excellent dispersibility. So, there’s no need to add extra mixing conditions. Traditional mixing processes or double-shaft horizontal forced mixers can be used.


After adding fibers, the viscosity of the concrete mix increases. If using a roller compactor, it may require 2-3 additional passes compared to concrete. Or, the compaction time can be extended by about 30 seconds.


Once the concrete surface has dulled, finishing can proceed to avoid pulling out fibers. This method of operation helps prevent fiber extraction. Normal curing procedures should still be followed as with regular concrete.





III. Recommend Polypropylene Fiber Supplier for Concrete

Yuanwang is your reliable source to buy PP Fiber. We are a professional China PP fiber manufacturer with over 20 years of experience. The SOE group supports us. We acquire a lot of land and tech resources for R&D in construction additives.


As one of the polypropylene fiber suppliers in the market, OEM solutions make us stand out. Yuanwang team provides team-based service. We support customizing your fibers and offer formula guidance.




We manufacture polypropylene by using high-quality raw materials. Each process is under strict quality control systems. All the construction additives meet ISO certification standards. We also support various payment and delivery methods. Contact our team if you have further questions about the products or services. We’re always here to provide the best support for your needs.




Ready to enhance your construction projects with polypropylene fiber? Contact Yuanwang today to explore our range of PP fiber solutions. Learn how they can benefit your projects now! Let’s build better together with Yuanwang’s polypropylene fiber solutions.

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