UHPC Hollow-Out Component Strength Assurance Solution: Structural Design and Process Optimization Analysis

UHPC hollow-out components, with their unique artistic expressiveness, have become a popular choice in modern architectural decoration, but the structural strength of hollow-out sections has always been a core concern for designers and owners. Leveraging 28 years of experience in in-depth design and production of UHPC components, Qinglong Group has built a comprehensive strength assurance system for hollow-out sections through scientific structural design, advanced process optimization, and strict quality control.

I. Structural Design Optimization: Balance Between Hollow-Out Shape and Load-Bearing????

Reasonable structural design is the foundation for ensuring the strength of hollow-out sections. During the in-depth design stage, Qinglong uses BIM technology and finite element analysis software to simulate the load conditions of hollow-out components and optimize the shape and distribution of hollow-outs. A uniformly distributed hollow-out layout is adopted to avoid local stress concentration, with the hollow-out ratio controlled within 50% (except for special designs). In the Ouargla Hotel project in Algeria, UHPC components with a hollow-out ratio exceeding 50% ensured structural stability by optimizing the hollow-out shapes and spacing. Meanwhile, stiffening ribs are set at the edges of hollow-outs to increase local strength; the width and thickness of the ribs are determined by calculation based on component dimensions and loads, generally not less than 50mm. For large hollow-out components, concealed support structures are installed inside, which do not affect the decorative effect while enhancing overall load-bearing capacity.

II. Material Formula Upgrade: Enhancing the Base Performance of UHPC

The high performance of the UHPC material itself provides core support for the strength of hollow-out sections. Qinglong uses a proprietary mix ratio developed in-house, selecting high-strength quartz sand, cement, and special admixtures, combined with a high dosage of steel fibers—at a steel fiber volume rate of no less than 2%—which effectively suppresses crack initiation and propagation and improves the bending and flexural capacity of the components. During production, raw material quality is strictly controlled: all aggregates must be sieved and washed to ensure reasonable gradation; copper-plated micro steel fibers are selected, with the length-to-diameter ratio optimized to the best level to strengthen the bond with the cement matrix. Through material formula upgrades, the UHPC hollow-out components produced by Qinglong maintain excellent mechanical properties even at hollow-out sections, with compressive strength exceeding 120MPa and flexural strength exceeding 20MPa.

III. Production Process Control: Ensuring Component Density and Uniformity

Sophisticated production processes maximize material performance and safeguard the strength of hollow-out sections. During casting, Qinglong uses a process combining vacuum dewatering with high-frequency vibration to ensure the UHPC slurry is filled compactly, free of air bubbles and pores; especially for narrow hollow-out areas, dedicated casting equipment ensures even slurry distribution. The curing stage adopts a steam curing process with precisely controlled temperature and humidity to promote full cement hydration and improve the strength and durability of the components. In the colored hollow-out carved panel project of the Liyuan Hotel in Nanning, Qinglong's refined process control achieved smooth surfaces and dense interiors at hollow-out sections, with strength fully meeting design requirements. In addition, sampling load tests are conducted on hollow-out components before leaving the factory, simulating actual service conditions to ensure the strength meets standards.

As a national high-tech enterprise that has participated in formulating UHPC industry standards, Qinglong Group holds multiple patented technologies in the field of UHPC hollow-out components. From the Shanghai Xinghewan project to the Sanya Festival Plaza project, it has successfully delivered thousands of square meters of hollow-out components, all verified through long-term use. Backed by full-chain service capability, Qinglong can provide customers with integrated solutions from in-depth design and material R&D to production and installation, thoroughly eliminating concerns about the strength of hollow-out sections.