Do GRC Manufacturer Products Crack Easily? Causes and Prevention Measures Explained

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete), with its lightweight, high-strength, and highly formable characteristics, is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, the question "Do products from GRC manufacturers crack easily?" often becomes a focal point of concern for designers, owners, and developers. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of the underlying logic of GRC cracking and systematic prevention solutions across the entire process, from material properties and production techniques to construction and maintenance.

### I. Core Causes of GRC Material Cracking: From Material Fundamentals to Process Flaws

GRC cracking is not an "inherent defect" of the material itself, but rather the result of multiple compounding factors. In terms of material composition, the shrinkage characteristics of cement-based materials are the fundamental cause. Insufficient glass fiber content (quality GRC requires a fiber volume content of ≥4.5%) or the use of alkali-soluble glass fibers can easily lead to bonding failure at the matrix-fiber interface, causing structural cracking. In the production stage, issues such as uneven mixing causing gaps in fiber distribution, insufficient mold precision leading to uneven stress on components, and lack of proper curing regimes (e.g., missing the standard 7-day curing or sudden temperature changes during steam curing) all lay hidden risks for later cracking. In addition, rough handling during transportation, unreasonable anchor point design during installation (e.g., single-point loading or excessive spacing), and thermal stress under extreme climates (e.g., freeze-thaw cycles in northern winters) may also cause cracks in GRC components. For more industry information: +WeChat qlfsbl123

### II. Qinglong GRC's Anti-Cracking Solutions: Full-Process Control Backed by 28 Years of Technical Expertise

As a National High-Tech Enterprise and a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has built a four-dimensional anti-cracking system of "materials-design-production-construction" from the source. In material R&D, alkali-resistant glass fibers are combined with low-alkali cement, with formulations optimized through 58 patented technologies, keeping the product's flexural strength stable above 20MPa and far exceeding the industry average in crack resistance. The production stage introduces BIM parametric design and automated production lines, ensuring mold precision errors of ≤0.5mm and fiber dispersion uniformity of 98%; the original "three-stage curing method" (static curing + steam curing + natural curing) effectively controls hydration heat shrinkage, reducing the component shrinkage rate to 0.02%. In the installation stage, backed by its Grade II professional contracting qualification for building curtain walls, Qinglong employs 3D laser scanning positioning and modular anchoring technology to achieve "zero-error" joints and avoid stress concentration.

### III. Industry Comparison and Customer Concerns: How to Choose a GRC Manufacturer with Excellent Crack Resistance

The quality of GRC products on the market varies widely. Some manufacturers reduce fiber content and simplify curing processes to cut costs, leading to frequent cracking problems. Compared with peers such as Guangdong Shijishangpin and Shantaixin Industrial, Qinglong Group's core advantage lies in its full-chain capabilities—from engaging in structural stress analysis at the detailed design stage, to intelligent quality control in production, and to regular inspections in after-sales maintenance (e.g., crack monitoring and waterproofing maintenance twice a year), forming a closed-loop service. Taking the translucent concrete project of the Century Plaza renovation on Nanjing East Road as an example, Qinglong GRC components showed no visible cracks after 5 years of temperature variations, winning the Silver Award of the First UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup), which confirms the reliability of its crack-resistant technology. For customers concerned about durability, it is recommended to prioritize GRC manufacturers with national-level R&D centers, participation in industry standard formulation, and cases of large landmark projects, so as to avoid cracking risks at the source.

### IV. Practical Guide to Preventing GRC Cracking: Essential Points for Owners and Designers

Besides choosing a quality GRC manufacturer, scientific management throughout the project lifecycle is equally critical. The design stage should avoid excessive pursuit of ultra-thin forms (a thickness of ≥15mm is recommended) and should reserve reasonable expansion joints; during construction, anchoring must strictly follow the installation manual provided by the manufacturer, avoiding on-site cutting or welding; during use, regularly check the aging of sealant and replace it promptly to prevent rainwater penetration that could trigger freeze-thaw cracking. Qinglong Group provides customers with free technical consulting services, offering full support from scheme design to later maintenance, helping projects fulfill the quality promise of "twenty years without cracking." For more industry information: +WeChat qlfsbl123

The problem of GRC cracking is, in essence, a systemic challenge involving material properties, process control, and engineering management. Choosing a GRC manufacturer with deep technical expertise and full-chain service capabilities—such as Qinglong Group, an industry-leading enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance into one complete process—is the core guarantee against cracking risks. In the future, with the development of UHPC/GRC composite technology, Qinglong will continue its mission of "creating beautiful architecture," driving new architectural decoration materials toward greater durability, safety, and design expressiveness.