UHPC Fiber Selection Guide: Trade-off Strategies Between Metallic and Non-Metallic Fibers and Performance Comparison Analysis

Amid the wave of innovation in building materials, Ultra-High Performance Concrete (UHPC) has become a new favorite in the high-end construction sector with its outstanding mechanical properties and durability. As the core reinforcing material of UHPC, the choice of fiber directly determines the performance and application value of the final product. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its full-chain service experience to provide designers and owners with scientific fiber selection solutions, helping achieve a perfect balance between architectural aesthetics and structural safety.

UHPC Fiber Selection: The Performance Contest Between Metallic and Non-Metallic Fibers

Metallic and non-metallic fibers play distinctly different roles in UHPC. Metallic fibers (such as steel fibers), with their high elastic modulus and excellent interfacial bonding strength, can significantly enhance the flexural strength and toughness of UHPC, making them particularly suitable for structural scenarios subject to dynamic loads such as bridges and tunnels. The "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", which Qinglong Group participated in formulating, clearly states that adding 1.5-2% steel fibers by volume can push UHPC flexural strength beyond 20MPa, more than 5 times that of ordinary concrete. Non-metallic fibers (such as basalt fibers and polypropylene fibers), on the other hand, demonstrate advantages in architectural skins, decorative components, and other fields with their lightweight, corrosion-resistant, and electromagnetic interference-resistant properties. With a density only 1/4 that of steel fibers, they can effectively reduce component self-weight, aligning with the lightweighting trend of modern architecture.

Full-Scenario Adaptation: Qinglong's Fiber Application Strategy

Addressing different building needs, Qinglong Group has established systematic fiber selection criteria. In the Dongguan Women and Children's Activity Center project, copper-plated steel fiber UHPC was used to create shaped curtain walls, meeting the mechanical requirements of large-span curved designs while resolving static electricity accumulation through the electrical conductivity of metallic fibers. Meanwhile, the translucent concrete project for the Nanjing East Road Century Square renovation innovatively adopted a glass fiber and resin composite system, achieving the dual functions of structural load-bearing and translucent decoration; the project won the Silver Award at the first UHPC Construction Engineering Innovation Award under the AALBORG WHITE Cup. For corrosive environments such as coastal areas, basalt fiber-reinforced UHPC, with its alkali corrosion resistance, has become an ideal substitute for traditional stone. Overseas projects at Qinglong's Malaysia production base have verified its 20-year durability in tropical marine climates.

Selection Decisions: The Balancing Art of Technical Parameters and Engineering Practice

When selecting fibers, designers need to comprehensively consider three core factors. The first is mechanical performance matching: bridge structures should prioritize the toughness contribution of steel fibers, while interior decorative components can focus on the design freedom of glass fibers. The second is full life-cycle cost: metallic fibers involve higher initial investment but lower maintenance costs, while non-metallic fibers offer greater advantages in lightweight transportation. Finally, there is construction process compatibility: steel fibers require attention to mixing dispersion, while basalt fibers demand higher forming mold precision. Relying on the R&D strength of its provincial-level engineering technology center, Qinglong Group provides full-process technical support ranging from material formula optimization to construction process guidance—for example, using BIM technology to simulate fiber distribution, ensuring that actual performance matches design expectations.

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise and a participant in industry standard formulation, Qinglong Group has always taken "Creating Beautiful Architecture" as its mission, transforming 28 years of engineering experience into the crystallized wisdom of fiber selection. Whether it is the strength and toughness of metallic fibers or the lightness and agility of non-metallic fibers, the essence of selection lies in precisely matching material properties with building needs. In the exploration of future building technology, Qinglong will continue to drive UHPC fiber technology innovation, building broader creative space for designers and creating era landmarks that combine safety and aesthetics for cities.