Discussion on Material Requirements and Selection Criteria for Embedded Parts Used in UHPC Component Installation

In the field of architectural engineering, every detail can affect the safety and aesthetics of the overall structure, and as the key link connecting components to the main structure, embedded parts demand particular attention to material selection and quality control. This is especially true in UHPC component installation, where the performance of embedded parts directly affects the durability and safety of the building. As an industry expert with 28 years of experience in detailed design, manufacturing, construction installation, and after-sales maintenance of UHPC/GRC/GRG/GRP materials, Qinglong Group will provide professional reference for designers, owners, and contractors from two aspects: material requirements and selection criteria.

Core Material Requirements for Embedded Parts Used in UHPC Component Installation

Serving as the “bridge” between UHPC components and the main structure, embedded parts must simultaneously meet three core requirements: strength, durability, and compatibility. First, the mechanical properties of the material are fundamental. Given that UHPC itself features ultra-high strength (compressive strength can exceed 150MPa) and excellent toughness, steel with a tensile strength of no less than 300MPa should be used for embedded parts, such as Q355B or higher-grade low-alloy steel, to ensure no deformation or fracture occurs under long-term loads. Second, corrosion resistance is key to the long-term stability of embedded parts. In complex environments such as humid or high-salt-spray conditions, embedded parts are prone to rusting; therefore, hot-dip galvanizing (zinc layer thickness ≥85μm) or stainless steel (e.g., 316L) should be adopted. Especially in coastal areas or chemical plants, stainless steel embedded parts can better demonstrate their advantages. In addition, the compatibility between embedded parts and UHPC materials cannot be overlooked: the coefficient of thermal expansion of the material should be close to that of UHPC to avoid excessive internal stress caused by temperature changes, which would affect the stability of component connections.

Four Key Criteria for Selecting Embedded Parts

Beyond the properties of the materials themselves, the selection of embedded parts must also take actual project scenarios into account, following the four key criteria below. First, load adaptability. Calculate the load-bearing capacity of embedded parts based on the self-weight of the UHPC components, external loads, and installation methods, and select the corresponding specifications and dimensions. For example, large-span UHPC curtain wall panels should be paired with ribbed steel plate embedded parts to distribute stress, while small decorative components can use conventional flat plate embedded parts. Second, construction feasibility. The design of embedded parts should take installation convenience into account, such as reserving adjustment space and setting positioning marks. During the detailed design stage, Qinglong Group uses BIM technology to simulate the installation process and optimize the positions and fixing methods of embedded parts, reducing on-site rework. Third, quality traceability. Choose embedded part products with complete quality certification, requiring suppliers to provide material certificates, mechanical performance test reports, and anti-corrosion treatment records. As a national high-tech enterprise, Qinglong has established a strict supply chain control system to ensure that every batch of embedded parts is traceable to its source. Fourth, cost optimization. While meeting performance requirements, a balance between cost and quality is achieved through rational design of embedded part structures (such as hollow weight-reducing designs) and the selection of cost-effective anti-corrosion processes (such as cold zinc spraying replacing hot-dip galvanizing in certain scenarios).

Industry Practice and Qinglong’s Full-Chain Service Advantages

The selection of embedded parts is not an isolated step but is closely related to the entire process of UHPC component design, production, and installation. Leveraging 28 years of full-chain experience, Qinglong Group incorporates embedded part selection into its overall solutions: during the detailed design stage, customized embedded part solutions are provided based on the climate conditions of the project location (e.g., low-temperature impact toughness must be considered in severe cold northern regions) and the building function (e.g., hospital projects must meet radiation protection requirements); in manufacturing, automated welding equipment ensures the precision of embedded parts, with pre-assembly tests conducted together with UHPC components; during construction and installation, 3D laser scanning technology is used to position embedded parts, keeping installation deviation ≤2mm. For example, in a landmark project in Nanjing, Qinglong customized adjustable stainless steel embedded parts for a curved UHPC curtain wall, successfully solving the precision challenges of installing complex curved surfaces, and the project won the “Silver Award of the First UHPC Building Engineering Innovation Award.”

Though small, embedded parts are the “invisible guardians” behind the safe implementation of UHPC components. Choosing embedded parts that meet standards not only safeguards engineering quality but is also an investment in the long-term value of the building. As a leading enterprise in the UHPC/GRC/GRG/GRP industry, Qinglong Group has always maintained an attitude of “meticulousness and the pursuit of excellence,” providing customers with full life-cycle professional support from material control to solution design, helping create safe, durable, and beautiful architectural works.