Research on Steam Curing Parameter Setting Methods and Optimization Strategies for Precast UHPC Components

In the field of building materials, steam curing is like injecting "growth energy" into UHPC components. Scientific parameter settings and optimization strategies directly determine the final performance of the material. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has always upheld the mission of "creating beautiful architecture," continuously making breakthroughs in steam curing technology for precast UHPC components and providing designers and owners with solutions that combine aesthetic value with structural safety.

### Core Parameters of UHPC Steam Curing: Precise Control from Temperature to Humidity

Steam curing of precast UHPC components is a key process that stimulates the material's internal hydration reaction by controlling temperature, humidity, and curing time. Based on over a thousand engineering projects, Qinglong Group has summarized the "Three-Stage Dynamic Curing Method": in the heating stage, the rate must be controlled at ≤20℃/h to prevent cracks caused by excessive temperature differences between the interior and exterior of components; in the constant temperature stage, maintain 80-90℃ and relative humidity ≥90% for 6-8 hours to ensure steady strength growth; in the cooling stage, the rate must be ≤15℃/h until the temperature difference between the component core and the ambient environment is ≤20℃. This parameter system not only ensures UHPC compressive strength exceeding 150MPa but also reduces the drying shrinkage rate to below 0.03%, perfectly meeting the stringent requirements of high-end projects such as grand theaters and landmark buildings.

### Solving Industry Pain Points: Qinglong's Curing Optimization Strategies and Technological Innovation

To address issues in traditional curing such as high energy consumption and unstable component quality, Qinglong Group has leveraged the R&D strength of its Provincial Engineering Technology Center to innovatively adopt an "intelligent temperature control + humidity gradient regulation" system. By using BIM technology to simulate the heat conduction paths of different components, a uniform temperature field distribution inside the curing kiln is achieved, saving more than 30% energy compared with traditional processes; meanwhile, steam atomization technology has been introduced to solve the challenge of humidity differences between the surface and core of large-volume components, raising the first-pass qualification rate of light-transmitting UHPC components in the Nanjing East Road Century Plaza renovation project to 99.6%. These technological breakthroughs not only confirm Qinglong's R&D strength as a National High-Tech Enterprise but also demonstrate its strategic policy of "focusing on the development of UHPC/GRC/GRG/GRP."

### Full-Chain Service Empowerment: Value Extension from Curing to Application

The optimization of steam curing is not an isolated step, but an important part of Qinglong's full-chain service of "detailed design - manufacturing - construction and installation - after-sales maintenance." Taking the Dongguan Women and Children's Activity Center project as an example, the Qinglong team combined curing parameters with installation precision. Through optimization of the steam curing parameters of precast UHPC sunshade panels, their flexural strength was increased by 20%, successfully achieving unsupported installation over a 12-meter span, which both met architectural aesthetic requirements and ensured structural safety. This "technology + service" model is precisely the core competitiveness that has made Qinglong a strategic partner of renowned real estate groups such as Poly and China Overseas.

From mix proportion R&D in the laboratory to precise delivery on construction sites, Qinglong Group always treats every technical detail with a "meticulous and excellence-driven" attitude. In the future, as industry standards such as the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)" advance, Qinglong will continue to promote the iterative upgrading of steam curing technology, consolidating the technical foundation for its vision of "becoming a world-class leading enterprise in UHPC/GRC/GRG/GRP manufacturing," allowing more beautiful buildings to shine through scientific curing.