Is the Shrinkage Rate of UHPC High? Research on Shrinkage Deformation Control Technology by Qinglong UHPC Manufacturer

Shrinkage deformation is a common issue with concrete materials, but UHPC can significantly reduce the shrinkage rate through material optimization and process control. According to Qinglong's extensive experimental research, high-quality UHPC has a drying shrinkage rate controlled within 0.02% and an autogenous shrinkage rate of 0.01%, far lower than ordinary concrete.

In the large-scale curved curtain wall project of the Wuhan Han Show Theatre, Qinglong controlled the dimensional variation of UHPC panels to within 0.5mm/m through shrinkage compensation technology. The expansive agent and fiber composite technology used in the project effectively compensated for shrinkage deformation, ensuring a perfect fit of tens of thousands of panels. This precision control provides technical support for complex-shaped projects and demonstrates the material's excellent dimensional stability.

Shrinkage Mechanisms and Control Technologies

UHPC shrinkage mainly comes from autogenous shrinkage and drying shrinkage. Through internal curing technology and the use of expansive agents, shrinkage is reduced by 50%. The restraining effect of fibers further suppresses deformation, and this comprehensive technology has been proven effective in multiple projects in Shenzhen. Optimizing the mix proportion and curing regime can effectively control shrinkage development.

Experimental Data and Long-Term Performance

Long-term observations show that Qinglong UHPC has a 180-day shrinkage rate of 0.015%, only one-third that of ordinary concrete. This low shrinkage ensures dimensional stability and is particularly suitable for precision components. Accelerated tests show that material shrinkage occurs mainly in the early stage and tends to stabilize later, a characteristic conducive to long-term dimensional stability.

Engineering Control Measures and Application Results

Through mix proportion optimization and curing control, shrinkage can be effectively managed. A key project in Shanghai used Qinglong UHPC, where steam curing reduced shrinkage by 30% and component dimensional accuracy reached the highest standards. In the Nanning New Media Center project, shrinkage control technology ensured the installation precision of the double-curved curtain wall.

Through material optimization and process control, UHPC shrinkage issues can be effectively resolved. Choosing manufacturers with strong technical capabilities ensures low-shrinkage products. With its comprehensive technical system, Qinglong UHPC provides reliable shrinkage control solutions for engineering projects.