Is the Shrinkage Rate of UHPC High? Shrinkage Control Technology and Engineering Applications of Ultra-High Performance Concrete

Shrinkage rate is a key factor affecting the cracking risk of concrete materials, directly related to the stability and aesthetics of building components. As ultra-high performance concrete, UHPC achieves the performance advantage of low shrinkage through scientific formulation design and process optimization, effectively avoiding cracking hazards. Qinglong Group has been deeply engaged in the UHPC field for 28 years, providing low-shrinkage, highly stable UHPC products for various projects with mature shrinkage control technology and extensive engineering practice.

#Core Performance of UHPC Shrinkage Rate: Low Shrinkage Ensures Structural Stability

The shrinkage rate of UHPC is far lower than that of traditional concrete, with drying shrinkage controllable below 500με, while autogenous shrinkage is also effectively suppressed through technical means. This performance stems from the material characteristics of UHPC—its dense microstructure reduces volume shrinkage caused by water evaporation, while the hydration reaction of reactive powders and the restraining effect of fibers further offset shrinkage stress. The low shrinkage rate greatly reduces the cracking risk of UHPC components during production, transportation, installation and use, making it especially suitable for the production of large-sized, thin-walled and special-shaped components.

#Technical Approach to Shrinkage Control: Qinglong's Full-Process Optimization System

The realization of UHPC's low shrinkage rate is inseparable from Qinglong's continuous investment in technology R&D and production control. As a provincial-level R&D center, Qinglong optimized the mix proportion design of UHPC, incorporating special expansive agents and retarding components to balance hydration heat and shrinkage stress; adopted premixed dry-mix technology and precise water-adding mixing to ensure material homogeneity and reduce local shrinkage differences; and in the curing stage, implemented a combination of steam curing and later-stage moist curing to slowly release shrinkage stress. In addition, the industry standards formulated with Qinglong's participation clearly specify the test methods and control indicators for UHPC shrinkage rate, leading the high-quality development of the industry.

#Low-Shrinkage Engineering Evidence: Stable Application Performance of Qinglong UHPC

The successful practice of numerous large-scale projects confirms the low-shrinkage advantage of Qinglong UHPC. The UHPC sculpture components over 3 meters at the Shanghai Astronomy Museum, with large dimensions and complex shapes, achieved excellent crack-free performance after integral molding thanks to the low shrinkage rate; the 12,000-square-meter UHPC exterior wall cladding panels at the Yangshengtang Pharmaceutical Hangzhou Industrial Park showed no joint gaps or cracking caused by shrinkage after large-area installation. These cases fully demonstrate that the low shrinkage rate of UHPC can effectively ensure the structural stability and decorative effect of components, reducing later maintenance costs.

Shrinkage rate control is a key technical challenge in the application of UHPC materials and a core indicator for measuring a manufacturer's technical strength. With 28 years of full-chain experience, Qinglong Group has deeply integrated low-shrinkage technology with actual engineering needs, providing reliable solutions for real estate, municipal engineering, public art and other fields. Choosing Qinglong UHPC not only provides high-quality products with low shrinkage and high stability, but also one-stop services from design development to after-sales maintenance, keeping building components structurally intact and aesthetically pleasing at all times.