Does UHPC Have a High Shrinkage Rate? Qinglong UHPC Low-Shrinkage Control Technology, No Cracking Risks in Projects

"Material shrinkage cracking is a hidden killer of engineering quality; low shrinkage is the key to stable UHPC application" — Concrete-type materials generally exhibit shrinkage. If the shrinkage rate is too high, it can easily cause component cracking, compromising the safety and durability of the project. As a high-performance material, controlling UHPC's shrinkage rate is a technical challenge in the industry. Through formula optimization, process innovation, and curing control, Qinglong has successfully kept UHPC's drying shrinkage rate within 300με, far below the industry average, fundamentally eliminating the risk of shrinkage cracking.

Principle of Shrinkage Rate Control: Multiple Technical Measures to Suppress Shrinkage Deformation The core of Qinglong UHPC's low shrinkage is a triple technical system of "formula optimization + process control + enhanced curing". At the formula level, low-shrinkage specialty cement is carefully selected and paired with ultra-fine mineral admixtures, and the autogenous shrinkage of cement paste is reduced through the synergistic effect of hydration reactions; a dedicated expansion agent is added to offset part of the shrinkage deformation through its expansive effect; aggregate gradation is optimized to improve density and reduce the space for drying shrinkage. At the process level, automated precise batching and high-frequency vibration molding are adopted to ensure a uniform internal structure and avoid uneven shrinkage caused by insufficient local density; the water-binder ratio is strictly controlled below 0.2, reducing drying shrinkage caused by moisture evaporation at the source. At the curing level, a combination of high-temperature steam curing and subsequent moist curing is employed to promote complete hydration reactions, reduce internal and external humidity differences, and prevent drying shrinkage cracking.

Test Data and Engineering Verification: Low Shrinkage Performance, Stable and Reliable According to authoritative third-party testing, Qinglong UHPC's 28-day drying shrinkage rate is only 200-300με, far lower than ordinary concrete (typically 500-800με) and even better than some comparable high-end products. This low shrinkage performance has been fully verified in actual engineering applications. The super-large UHPC components at Shanghai New World Nanjing East Road Century Plaza, with a single panel area of up to 12m², showed no shrinkage cracks after installation without post-cast strips or expansion joints; the 12,000-square-meter UHPC exterior wall cladding panels at Yangshengtang Pharmaceutical's Hangzhou Industrial Park have smooth, flat joints with no cracking or deformation over long-term use. The success of these projects proves that Qinglong UHPC's low shrinkage performance can effectively adapt to complex engineering scenarios such as large components and large-area installations, completely solving the pain point of shrinkage cracking in traditional concrete.

Advantages of Low Shrinkage Technology: Extending Project Life, Reducing Maintenance Costs Low shrinkage performance brings multiple values to projects. First, avoiding shrinkage cracking keeps UHPC components structurally intact, effectively blocking the intrusion of moisture and harmful substances and greatly enhancing project durability; second, there is no need to install excessive expansion joints and post-cast strips, which simplifies construction processes, shortens construction periods, and enhances the overall integrity and aesthetics of the building's appearance; finally, it reduces repair and replacement costs caused by shrinkage cracking, lowering the project's total life-cycle cost. Qinglong has also combined low shrinkage technology with other performance features; the developed integrated low-shrinkage, high-strength UHPC products have been widely used in bridges, landmark buildings, industrial plants, and various other projects, earning high recognition from customers. As a company participating in the formulation of UHPC industry standards, Qinglong's low shrinkage control technology also provides an important reference for the industry.

Shrinkage rate control is one of the core indicators for measuring UHPC product quality. With its triple technical system and extensive engineering experience, Qinglong has achieved stable low shrinkage performance in UHPC. For customers pursuing engineering quality and long-term stability, choosing Qinglong UHPC means no need to worry about shrinkage cracking, and they can obtain quality projects with stable structures, strong durability, and beautiful appearance. Twenty-eight years of technical accumulation have given Qinglong unique advantages in the field of low shrinkage UHPC, making it a benchmark enterprise for low shrinkage solutions in the industry.