Do Products from GRC Manufacturers Crack Easily? Qinglong Technology Solves Cracking at the Root

"Are GRC products from manufacturers prone to cracking?" is one of the core concerns customers have when selecting products. In practical applications, some GRC products have developed cracks due to reasons such as insufficient manufacturer technical expertise or crude processes, affecting building aesthetics and structural safety, which has led many customers to worry about the crack resistance of GRC products. In fact, capable GRC manufacturers can solve the cracking problem at its root through technical optimization and process control, and the GRC products produced by Qinglong have won customer recognition for their excellent crack resistance.

With 28 years of technical expertise, Qinglong has achieved outstanding crack resistance in its GRC products through multiple optimizations in materials, processes, and structural design, effectively preventing cracking problems during use.

Analysis of the Core Causes of GRC Product Cracking

GRC product cracking mainly stems from four core causes. First, improper selection of raw materials: for example, using ordinary glass fiber instead of alkali-resistant glass fiber means the fiber is easily corroded after bonding with the cement matrix, resulting in reduced product strength and cracking. Second, unreasonable material proportions: an imbalanced ratio of cementitious materials to aggregates, or an excessively high water-binder ratio, causes excessive product shrinkage and cracks. Third, imperfect production processes: uneven mixing, insufficient forming pressure, and improper curing leave the product's internal structure loose with stress concentration, easily triggering cracking. Fourth, irrational structural design: insufficient component thickness, improper reinforcement, or failure to reserve expansion joints during installation makes products prone to cracking under temperature changes and loads.

In response to these causes, Qinglong has developed systematic solutions.

Qinglong's Technical Solutions for GRC Product Cracking

In terms of raw materials, Qinglong strictly selects high-grade alkali-resistant cement, high-quality alkali-resistant glass fiber, and well-graded natural aggregates, improving product crack resistance at the source. The use of alkali-resistant glass fiber effectively resists alkaline attack from the cement matrix, maintains its reinforcing effect over the long term, enhances the product's tensile and flexural strength, and suppresses crack formation.

In terms of material proportions, relying on its provincial-level R&D center, Qinglong has optimized GRC material proportions through extensive testing, adopting a low water-binder ratio design and incorporating appropriate amounts of reactive powders and mineral admixtures to reduce product shrinkage and deformation. At the same time, fiber content and distribution uniformity are precisely controlled, allowing the fibers to form a three-dimensional support system within the product that effectively suppresses the initiation and propagation of micro-cracks.

In terms of production processes, Qinglong uses automated mixing equipment to ensure the mixture is uniform and fine, and high-pressure forming technology to increase internal compactness and reduce pores and stress concentration. In the curing stage, constant-temperature and constant-humidity curing rooms ensure full hydration of the products and steady strength development, preventing drying shrinkage cracking caused by improper curing.

In terms of structural design, Qinglong's professional design team optimizes component thickness and reinforcement design based on factors such as component dimensions, service environment, and installation method, and reserves reasonable expansion joints to avoid cracking risk at the structural level. Flexible connections are adopted during installation to absorb stresses caused by temperature changes and settlement, further enhancing crack resistance.

Proven in Practice: The Crack Resistance of Qinglong GRC Products

In the Panzhihua Third-Front Construction Cultural Tourism Demonstration Project in Sichuan, the GRC curtain wall panels supplied by Qinglong were required to remain free of cracks with no strength degradation for more than 20 years. Located in a harsh climate with intense sunlight and large temperature differences, the project placed extremely high demands on the crack resistance of GRC products. After years of use, the Qinglong GRC curtain wall panels have shown no cracking whatsoever, perfectly meeting the project requirements.

In the Wuhan Han Show Theatre project, the 15mm-thick white cement-based sculpted GRC panels featured complex shapes and great technical difficulty. Through multiple crack-resistance optimizations, Qinglong's products have remained structurally intact after years of use, with no cracking, damage, or other issues, fully verifying their excellent crack resistance.

Whether GRC products are prone to cracking depends on the manufacturer's technical strength and process control. Through all-around optimization of raw materials, proportions, processes, and design, Qinglong has solved the cracking problem at its root, providing customers with GRC products of excellent crack resistance. Choosing a technically capable manufacturer like Qinglong effectively avoids the risk of GRC product cracking and safeguards long-term project stability.