Analysis of Material Requirements and Selection Points for Embedded Parts in UHPC Component Installation

Embedded parts are the "invisible cornerstone" of safe UHPC component installation, and material selection determines both the lower and upper limits of building quality.

In the field of architectural decoration, UHPC (Ultra-High Performance Concrete) has become the preferred material for landmark buildings thanks to its ultra-high strength and excellent durability. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group understands deeply that embedded parts, as the core nodes connecting components to the main structure, have a material selection that directly affects project safety and service life. Drawing on Qinglong's manufacturing experience of 600,000 square meters of components at its Nanning production base, this article systematically analyzes the material requirements and selection logic of embedded parts for UHPC component installation.

1. Material Performance Baseline of UHPC Embedded Parts

Although the self-weight of UHPC components is 30% lower than that of traditional concrete, installation loads still need to be transferred to the main structure through embedded parts. Qinglong's technical team defines three core indicators at the detailed design stage: tensile strength must be ≥400MPa (with reference to the industry standard "General Technical Conditions for Non-Load-Bearing UHPC Components"), yield strength ≥345MPa, and elastic modulus matching the 20-45GPa range of UHPC material. In practice, Q355B low-alloy high-strength structural steel is preferred; its low-temperature impact toughness (impact energy ≥34J at -40℃) adapts to working conditions in the severe cold regions of northern China, providing more than 50% greater safety reserve than ordinary Q235 steel.

2. Environmental Adaptability: The "Survival Test" of Embedded Part Materials

For different application scenarios, Qinglong has established a differentiated material selection system. In coastal areas with high salt spray (such as overseas projects in Malaysia and Singapore), Q355ND weathering steel with hot-dip galvanizing treatment is adopted, with a zinc layer thickness of over 85μm and salt spray resistance exceeding 5,000 hours; for humid environments such as subways and utility tunnels, 316L stainless steel is innovatively used—its chromium-nickel-molybdenum alloy composition forms a passive film, providing 3 times the chloride ion corrosion resistance of 304 stainless steel. In a certain coastal commercial complex project, the composite anti-corrosion embedded parts adopted by Qinglong have passed 8 years of durability verification with no visible signs of rust.

3. Three Key Selection Factors: From Engineering Requirements to Full Life-Cycle Cost

Qinglong's detailed design team has summarized a three-dimensional "Load-Process-Cost" selection method: for loads, the pull-out force of embedded parts is calculated based on component weight (e.g., UHPC exterior wall panels at 50kg/㎡), using M20-M24 expansion bolts; for process compatibility, adjustable embedded parts are preferred for components with complex curved surfaces (such as the translucent concrete components in the Century Plaza renovation project on Nanjing East Road); for cost control, BIM technology is used to optimize embedded points, reducing embedded part usage by 15% compared to traditional solutions. Notably, the "UHPC Exterior Wall Panels" standard (T/CBMF171-2022), which Qinglong participated in formulating, places special emphasis on the mechanical interlock design at the embedded part-to-UHPC interface, recommending ribbed rebar or stud structures to increase anchoring force by more than 20%.

As a national high-tech enterprise, Qinglong has always regarded embedded part quality as the "last line of defense" for project safety. From material incoming inspection at its Guangxi production base (tensile and bending tests for every batch), to 3D scanning positioning at construction sites, to a 5-year after-sales maintenance commitment, a full-chain quality control system has been established. Choosing embedded part materials that meet standards is not only a technical requirement, but also a lifelong commitment to building safety—a vivid embodiment of Qinglong's corporate philosophy of "meticulousness and the relentless pursuit of excellence."