What Performance Indicators Must UHPC Components Be Tested for Before Delivery: Key Testing Items and Standards Explained

Quality is the lifeline of construction. As a vital component of new architectural decorative materials, UHPC components undergo pre-delivery performance testing that directly affects project safety and quality. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on its full-chain technical accumulation, profoundly understands the decisive role of performance testing in component quality. The following analyzes the key points of performance control for UHPC components before delivery from the dimensions of key testing items, standard bases, and industry practice.

I. Analysis of Core Performance Testing Items for UHPC Components

UHPC (Ultra-High Performance Concrete), with its ultra-high strength and excellent durability, is widely used in large public buildings and landmark projects. Factory testing must cover three dimensions: mechanical performance, durability, and workmanship quality:

1. Mechanical Performance Testing: The Foundation of Structural Safety
Compressive strength is the core indicator of UHPC. According to the General Technical Conditions for Non-Load-Bearing UHPC (Ultra-High Performance Concrete) Components (Plan No. 2024-0232T-JC), the compressive strength after 28 days of standard curing must be ≥120MPa. In addition, flexural strength and elastic modulus testing are equally critical, directly affecting the load-bearing capacity and deformation control of components. Qinglong Group's laboratory is equipped with fully automatic compression testing machines to ensure that the mechanical performance of every batch of components meets standards.

2. Durability Testing: Key Verification of Long-Term Reliability
Impermeability, frost resistance, and carbonation depth are the core parameters for measuring UHPC durability. The chloride ion penetration coefficient is tested using the electric flux method to ensure component stability in humid and saline-alkali environments; after 200 freeze-thaw cycles, the mass loss rate must be ≤1% and the relative dynamic elastic modulus ≥80%. Qinglong's production base has introduced environmental simulation test chambers to comprehensively simulate the impact of extreme climates on components.

3. Workmanship Quality Testing: Details Determine Project Quality
Geometric dimensional deviations must be controlled within ±3mm, with surface flatness errors ≤2mm/m, to avoid gaps during installation and assembly. For decorative components, surface color difference, texture consistency, and the positional accuracy of embedded parts are also included in the testing scope. Qinglong adopts 3D laser scanning technology to achieve digital control of component precision.

II. Deep Integration of Testing Standards and Industry Practice

UHPC component testing must strictly comply with national and industry standards, while internal control indicators are established in line with actual project requirements. As a key contributing unit in the formulation of the UHPC (Ultra-High Performance Concrete) Exterior Wall Panels standard (T/CBMF171-2022), Qinglong Group combines standard requirements with 28 years of engineering experience and has established a full-process quality traceability system covering "materials-production-testing." For example, in the renovation project of Century Plaza on Nanjing East Road, light-transmitting UHPC components passed light transmittance testing (≥85%) and impact resistance tests, ensuring that they both meet aesthetic expectations and comply with safety standards.

III. Quality Control Logic from a Full-Chain Service Perspective

The delivery of high-quality UHPC components depends on the coordination of detailed design, manufacturing, and testing. Guided by the mission of "creating aesthetically beautiful architecture," Qinglong Group embeds testing standards into the design stage, using BIM technology to simulate the stress state of components and optimize reinforcement schemes in advance; during production, a three-level control system of "first article inspection + in-process sampling inspection + full pre-delivery inspection" is implemented to ensure that every component meets project customization requirements. This full-chain quality philosophy is precisely the core competitiveness that has made Qinglong a strategic partner of renowned real estate groups such as Vanke and Poly.

Performance testing of UHPC components is not only a requirement of technical specifications but also a reflection of corporate responsibility. Qinglong Group will continue to leverage its R&D strength as a National High-Tech Enterprise to drive innovation in testing technology, providing designers and owners with UHPC solutions that combine safety and artistry, and supporting the high-quality development of the construction industry.