Performance Indicators to Test Before UHPC Components Leave the Factory and Testing Standards Explained

Quality is the lifeline of architecture. As a benchmark among new architectural decorative materials, the pre-delivery performance testing of UHPC components directly relates to building safety and aesthetic presentation. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will provide a professional analysis of the key performance indicators and testing standards that UHPC components must pass before leaving the factory, offering an authoritative reference for designers and owners.

I. Mechanical Performance Testing: Building a Solid Line of Defense for Structural Safety

The mechanical performance of UHPC components is the core guarantee of their load-bearing and impact resistance capabilities. According to the industry standard "General Technical Conditions for Non-Load-Bearing Ultra-High Performance Concrete (UHPC) Components" (Plan No. 2024-0232T-JC), compressive strength must reach above 120MPa and flexural strength no less than 20MPa—these two indicators directly reflect the material's load-bearing capacity. In production, Qinglong Group uses its self-developed patented formula (patent number omitted) and conducts testing with fully automatic compression testing machines to ensure that every batch of components meets mechanical performance requirements. In addition, elastic modulus testing must comply with the GB/T 50081 standard to guarantee deformation stability of components under long-term loads, which is particularly critical for large curtain walls and special-shaped components.

II. Durability Performance Testing: Resisting Natural Environmental Erosion

Durability is the foundation of the long-term service of UHPC components. Frost resistance testing requires that after 50 freeze-thaw cycles, the strength loss rate is ≤15% and the mass loss rate is ≤5%, which is crucial for projects in cold regions. Qinglong's production base is equipped with a -40℃ freeze-thaw test chamber to simulate material performance under extreme climate conditions. Impermeability testing is conducted according to the GB/T 50082 standard, with penetration height required to be ≤50mm, effectively preventing internal rebar corrosion caused by rainwater penetration. For coastal or high-humidity environment projects, the chloride ion penetration coefficient test (RCM method) must be ≤1.0×10⁻¹²m²/s to ensure the material's corrosion resistance.

III. Appearance and Dimensional Deviation Testing: Shaping Refined Architectural Aesthetics

As architectural decorative components, appearance quality directly affects visual effects. Surface flatness deviation must be controlled within 3mm/m, tested with a 2m straightedge and feeler gauge; length and width deviation of components is ±5mm, and thickness deviation ±2mm, achieving high-precision control through a three-dimensional coordinate measuring machine. Qinglong has introduced BIM technology and 3D scanning equipment to conduct full-size verification of complex special-shaped UHPC components (such as double-curved curtain wall panels and openwork reliefs), ensuring conformity with design models. Meanwhile, surface defects (such as cracks and air bubbles) must comply with the JC/T 940-2022 standard, and Grade 1 products must not have cracks longer than 30mm.

IV. Other Key Performance Testing: Details Determine Engineering Quality

Fire performance testing is based on GB/T 9978.1; the combustion performance of UHPC components must reach the Class A non-combustible material standard to meet the fire safety requirements of public buildings. For light-transmitting UHPC components (such as those applied in the Nanjing East Road Century Plaza renovation project), light transmittance testing must conform to the design value ±3%, precisely measured with a spectrophotometer. In addition, pull-out force testing of embedded parts (≥15kN) ensures installation anchoring safety, which is the quality prerequisite for the construction and installation stage in Qinglong's full-chain service.

From mechanical performance to appearance precision, from durability testing to safety verification, factory testing of UHPC components is a key link in ensuring engineering quality. As a national high-tech enterprise and a participant in the formulation of multiple industry standards, Qinglong Group always upholds a "meticulous and excellence-pursuing" attitude, integrating 28 years of full-chain experience into every product. Choosing rigorously tested UHPC components is not only a commitment to building safety, but also a guarantee for the perfect realization of design creativity. To learn more about UHPC/GRC/GRG/GRP material application solutions, stay tuned for in-depth interpretations from Qinglong Group's professional technical team.