Material Requirements for Embedded Parts in UHPC Component Installation: Strength, Durability and Compatibility Explained

Embedded parts are the core hub connecting UHPC components to the main structure, and their material selection directly affects the safety and long-term stability of component installation. Based on 28 years of experience in UHPC/GRC/GRP component installation and engineering practice across different climate environments nationwide, Qinglong Group has summarized the core requirements and selection criteria for embedded part materials to safeguard project safety.

1. Core Material Requirements: Meeting Both Strength and Durability Standards⚙️

Embedded parts for UHPC components must meet two core requirements: high strength and high durability. In terms of materials, low-alloy high-strength steel of grade Q355 or above is preferred, with a yield strength of no less than 355MPa, which can effectively bear the self-weight of UHPC components and external loads. Qinglong uses steel of this grade in all major projects to ensure connection strength. For projects in marine climates or high-humidity environments, embedded parts must be made of stainless steel (such as 304 or 316L) to prevent chloride ion corrosion. In the Hainan Changying Universal 100 Fantasy Park project, Qinglong selected 316L stainless steel embedded parts, which effectively resist erosion from the high-salt-spray seaside environment. In addition, embedded part materials must have good compatibility with UHPC to avoid electrochemical corrosion that could affect structural safety.

2. Key Requirements for Material Processing and Protection

Realizing the full performance of embedded part materials depends on precise processing and effective protection. For processing, steel must be derusted and straightened, and welds must be fully welded and undergo flaw detection to ensure there are no welding defects. In the Nanning Wuxiang China Resources MixC project, Qinglong adopted fully automatic welding equipment and ultrasonic flaw detection technology to guarantee the welding quality of embedded parts. For protection, ordinary steel embedded parts require hot-dip galvanizing with a galvanized layer thickness of no less than 85μm to enhance corrosion resistance, while stainless steel embedded parts require surface passivation treatment to improve wear resistance. In the Shanghai Qingpu R&D and production project, Qinglong applied a dual protection process, enabling the embedded parts to work stably over the long term even in humid environments such as underground garages.

3. Material Adaptability: Precise Selection Based on Project Scenarios

Embedded part materials must be precisely selected according to the project environment, component weight, and service life. For conventional UHPC components on building exterior walls, Q355 hot-dip galvanized steel embedded parts can meet the requirements with high cost-effectiveness; for super high-rise buildings, coastal areas, or projects requiring a service life of more than 50 years, 316L stainless steel embedded parts should be selected to improve durability. In the overseas Ouargla Hotel project in Algeria, Qinglong selected special alloy steel embedded parts with stronger weather resistance, taking into account the local hot and arid climate, to ensure the long-term stability of the components. In addition, the selection of embedded part materials must also consider compatibility with the connection method: bolt-connected embedded parts require matching high-strength bolt materials to ensure balanced overall load distribution.

As a national high-tech enterprise that has participated in the formulation of multiple industry standards, Qinglong Group has established a full-process inspection system for embedded part materials. From raw material procurement to finished product delivery, every batch of embedded parts must undergo strength and corrosion resistance testing to ensure compliance with standards such as the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC). Over the past 28 years, from the Wuhan Han Show Theatre to the Huawei headquarters project in Bantian, Shenzhen, Qinglong's embedded part material selection and treatment processes have never presented any safety hazards.

Scientific selection of embedded part materials is the foundation for safe UHPC component installation. With its full-chain service capabilities, Qinglong Group can provide customers with integrated solutions covering embedded part design, material selection, processing, and installation. Relying on production bases and technical teams across the country, Qinglong ensures that the embedded parts of every project are tailored to specific needs.