Why UHPC's Shear Performance Advantages Are Difficult to Reflect in Design: Cause Analysis and Discussion of Solutions

Details determine the success or failure of a project. The standardization of screw hole edge reinforcement for components is an invisible line of defense for the safe application of UHPC/GRC/GRG/GRP materials.

In the field of architectural decoration, new materials such as UHPC (Ultra-High Performance Concrete), GRC (Glass Fiber Reinforced Concrete), GRG (Glass Fiber Reinforced Gypsum), and GRP (Glass Reinforced Thermosetting Plastic) have become the preferred choice for projects such as grand theaters, commercial complexes, and high-end hotels thanks to their superior performance. However, in practical applications, the degree of standardization of screw hole edge reinforcement directly affects project quality and safety. With 28 years of experience in detailed design, manufacturing, and construction, Qinglong Group has always regarded detail craftsmanship as the core of product quality. This article will thoroughly analyze the chain of problems that non-standard screw hole edge reinforcement may cause, and propose professional solutions based on industry practice.

I. Hidden Dangers of Non-Standard Screw Hole Edge Reinforcement: From Material Damage to Structural Risk

As the key connection node between components and the main structure, screw holes require reinforcement treatment as the foundation for ensuring installation stability. If the reinforcement process is not standardized, it will first cause localized stress concentration in the material, easily triggering micro-cracks in brittle materials such as UHPC/GRC. Under long-term loads or environmental effects, these cracks may expand into through-going damage. For example, in a commercial complex project, the screw hole edges of a GRG ceiling were not treated with fiber reinforcement, causing screws to loosen under temperature changes and eventually leading to the detachment of local decorative panels. In addition, non-standard reinforcement processes reduce the pull-out resistance of components; under extreme conditions such as typhoons and earthquakes, this may cause overall connection failure, posing a serious threat to building safety.

II. Chain Effects on Engineering Quality and Cost: From Rework Losses to a Brand Trust Crisis

Unqualified screw hole edge reinforcement will directly lead to rework during the construction phase. When undertaking a landmark project, Qinglong Group found that the GRC components supplied by a partner had insufficient hole edge reinforcement, resulting in cracking at 30% of the screw holes during installation. This not only caused material losses of over 15% but also delayed the construction schedule by nearly 20 days. From a long-term operation and maintenance perspective, non-standard reinforcement processes accelerate component aging and increase after-sales maintenance costs. More seriously, such problems may trigger owners' doubts about material performance and damage the supplier's brand reputation. As a national high-tech enterprise, Qinglong has always controlled every process detail to the standard of "meticulous and excellence-driven," avoiding such risks through full-chain quality control.

III. Solutions for a Standardized Reinforcement Process: From Material Formulation to Construction Specifications

To address screw hole edge reinforcement issues, Qinglong Group, drawing on 28 years of technical expertise, has developed systematic solutions. At the material level, customized fiber ratios are adopted (e.g., alkali-resistant glass fiber content ≥5% in GRC), and compression molding is used to ensure material density at hole edges; at the design stage, BIM technology is used to simulate loading at hole positions and optimize hole diameter and spacing; during construction, the "Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018) is strictly implemented, with double-layer reinforcement applied to hole edges. Taking the Nanjing East Road Century Plaza renovation project as an example, the Qinglong team used this process to increase the screw hole pull-out resistance of UHPC translucent concrete components by 40%, ensuring the project's safety and aesthetics.

[Summary] Although screw hole edge reinforcement is a detail, it directly relates to the application safety and engineering quality of UHPC/GRC/GRG/GRP materials. As a participant in industry standard formulation, Qinglong Group has always practiced its mission of "creating beautiful architecture," leveraging its full-chain advantages to provide designers and owners with expert-level services from detailed design to after-sales maintenance. Choosing a supplier with standardized processes and rich experience is the key to avoiding potential risks and maximizing project value.