Differences in Mold Requirements Between UHPC Single-Curved and Double-Curved Panels and Key Technology Analysis

In an environment where acid rain erosion is becoming increasingly severe, protecting GRC exterior walls is not only the baseline of building safety, but also a deep integration of design aesthetics and material technology. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group uses technological innovation as a shield to build a comprehensive protection system for building exterior walls in acid rain regions.

Building exterior walls in acid rain regions have long faced severe challenges such as hydrogen ion erosion and material weathering, while GRC (Glass Fiber Reinforced Concrete), with its advantages of light weight, high strength, and flexible shaping, is widely used in high-end architectural decoration. However, in acid rain environments, if protective measures are inadequate, problems such as surface chalking, steel reinforcement corrosion, and reduced structural strength are likely to occur. Drawing on nearly thirty years of engineering practice, Qinglong Group has formed a scientific and systematic GRC exterior wall protection solution, covering material optimization, process upgrades, and full lifecycle management.

1. Strengthening at the Material Source: From Formulation Design to Performance Upgrades

The core of acid rain protection lies in enhancing the corrosion resistance of GRC materials themselves. Qinglong's GRC R&D team has achieved material performance breakthroughs through three technical approaches: first, optimizing the cement-based formulation by combining low-alkalinity sulphoaluminate cement with special mineral admixtures, reducing material porosity to below 15% and minimizing channels for acid rain penetration; second, introducing nano-scale silane impregnation technology to form a water-repellent protective layer on the material surface, reducing water absorption by more than 60%; third, using high alkali-resistant glass fiber (alkali resistance rate ≥98%) composited with basalt fiber for reinforcement, ensuring long-term mechanical performance stability. According to authoritative testing, Qinglong GRC soaked in a simulated acid rain environment with a pH value of 3.5 for 5,000 hours showed no obvious surface deterioration, with a flexural strength retention rate of over 85%, far exceeding industry standards.

2. Process Innovation: Full-Process Protection from Production to Installation

In the production stage, Qinglong adopts an automated spray molding process to ensure fiber dispersion uniformity with an error of ≤3%, and accelerates the hydration reaction through 28 days of hot water curing at 90°C, increasing the material's early strength by 40%. Addressing the large temperature differences and high humidity characteristic of acid rain regions, Qinglong pioneered the “three-dimensional pre-deformation” installation technology, using BIM models to simulate component deformation at different temperatures and reserving 1-3mm expansion joints to prevent cracking caused by thermal stress. Meanwhile, all anchoring systems are made of 316 stainless steel, combined with flexible connection joint designs, which both meet structural safety requirements and block the corrosion path of acid rain to metal components.

3. Full Lifecycle Management: A Closed-Loop System from Monitoring to Maintenance

Qinglong adheres to the philosophy of “30% materials, 70% maintenance” and has established full lifecycle records for GRC exterior walls. After project delivery, regular inspection services are provided, using drone infrared scanning and surface hardness testing to promptly identify hidden dangers such as internal debonding and steel reinforcement corrosion. For the special environments of acid rain regions, Qinglong offers customized maintenance plans: annual surface cleaning and silane coating repair, and in-depth structural inspection every five years. Taking a commercial complex project in a coastal acid rain region as an example, after 10 years of use and through systematic maintenance, the surface gloss of Qinglong GRC exterior walls remains at 80% of its initial value, and all structural performance indicators meet design requirements.

As a National High-Tech Enterprise and a contributing editor of the Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC), Qinglong Group has always driven industry progress through technological innovation. From material R&D to engineering practice, from domestic landmark projects to overseas markets in Southeast Asia, Qinglong GRC provides protection solutions that combine safety and aesthetic value for building exterior walls in acid rain regions with the systematic thinking of “preventing problems before they occur”. In the future, Qinglong will continue to deepen its expertise in UHPC/GRC/GRG/GRP material technology, guided by the mission of “creating beautiful architecture”, contributing the power of Chinese intelligent manufacturing to the global architectural decoration field.