Is the Shrinkage Rate of UHPC High? Qinglong UHPC's Low Shrinkage and Crack Resistance: Core Advantages for Ensuring Project Stability

Material shrinkage is a common issue in construction engineering. Excessive shrinkage can cause cracking and deformation of components, affecting structural stability and aesthetics. As ultra-high performance concrete, UHPC's shrinkage rate has always been a key industry concern. Through technological innovation, Qinglong has effectively controlled the shrinkage rate of UHPC, achieving the core advantage of low shrinkage and crack resistance, providing solid assurance for engineering stability.

From material R&D to engineering application, Qinglong has always made low shrinkage a core indicator of its UHPC products, using technical means to solve the challenge of shrinkage-induced cracking.

Industry Shrinkage Rate Levels for UHPC and Qinglong's Control Standards

The drying shrinkage rate of ordinary concrete is typically between 400-600με, making it prone to shrinkage-induced cracking. UHPC, with its higher cementitious material content, may have a relatively high shrinkage rate if shrinkage is not controlled. High-quality UHPC in the industry generally keeps the drying shrinkage rate below 200με, while Qinglong, through a series of technical optimizations, has further reduced UHPC's drying shrinkage rate to within 150με, with early autogenous shrinkage also effectively suppressed.

This low shrinkage level means that Qinglong UHPC components are almost free from harmful shrinkage-induced cracks during production, installation, and use, maintaining structural integrity and dimensional stability over the long term. They are especially suitable for large components, splicing and assembly projects, and high-precision decorative projects.

Qinglong's Technical Control System for Low-Shrinkage UHPC

The core of Qinglong's low-shrinkage UHPC lies in its trinity system of "raw material optimization + admixture regulation + process control". In raw material selection, low-shrinkage cement and reactive powders are used to reduce the hydration heat and shrinkage potential of cementitious materials; an appropriate amount of mineral admixtures is incorporated to optimize the hydration reaction process and reduce the shrinkage rate.

In admixture application, specialized low-shrinkage admixtures and retarders are used to effectively suppress early autogenous shrinkage and drying shrinkage, while improving concrete workability and reducing internal stress during forming. In production processes, precise control of the water-binder ratio and constant temperature and humidity curing processes ensure full and uniform hydration reactions, preventing shrinkage cracking caused by improper curing. In addition, Qinglong employs fiber reinforcement technology, leveraging the restraining effect of fibers to limit shrinkage deformation and further enhance the crack resistance of components.

Engineering Practice Verification of Low-Shrinkage Performance

In the renovation project of Century Plaza at New World on Nanjing East Road, Shanghai, Qinglong's UHPC wood-grain translucent panels reached maximum panel section dimensions of 3245*3530mm, with individual panel areas exceeding 12㎡. Components of such large dimensions place extremely high demands on shrinkage rate control. The low-shrinkage performance of Qinglong UHPC ensured that no cracks appeared during production, transportation, and installation, with assembly accuracy controlled within ±2mm, perfectly presenting the artistic effect of the design.

In the Shenzhen Pingshan High-tech Zone Comprehensive Service Center project, 30,000 square meters of UHPC-related curtain wall components have maintained good dimensional stability after years of use, with no shrinkage cracking, deformation, or other issues, laying a solid foundation for the project's Luban Award. In the Yangshengtang Pharmaceutical Hangzhou Industrial Park project, various types of UHPC exterior wall panels ensured the flatness and aesthetics of the building facade through low-shrinkage performance, with no joint cracking, wall leakage, or other issues caused by shrinkage.

Low shrinkage is key to ensuring long-term engineering stability. Qinglong uses technical means to control UHPC's shrinkage rate at an industry-leading level, eliminating the risk of shrinkage cracking at the source. Choosing Qinglong UHPC means choosing high-quality materials with dimensional stability and strong crack resistance, keeping buildings structurally safe and visually intact throughout long-term use.