GRC Product Carbonation Resistance Verification: Authoritative Methods and Practical Guide

Carbonation resistance is a core indicator of GRC product durability, directly affecting its service life in outdoor environments. Carbonation of GRC components under the action of carbon dioxide can lead to strength loss and surface powdering, and may even compromise structural safety. As a professional manufacturer that participated in formulating GRC industry standards, Qinglong Group shares scientific methods for verifying carbonation resistance to help customers select quality products.

#Authoritative Test Report Verification: Obtain Core Data Support Verifying carbonation resistance through authoritative test reports is the most direct method. Request that the GRC manufacturer provide a carbonation resistance test report issued by a third-party testing agency with CMA qualification, with particular attention to the carbonation depth indicator (the standard requires a 28-day carbonation depth of no more than 5mm). All GRC products produced by Qinglong have passed third-party testing, with carbonation resistance far exceeding industry standards—the 28-day carbonation depth is controlled within 3mm, and complete test reports are available for customer verification. In addition, check whether the product model and production batch on the test report match the actual purchased products to avoid report fraud.

#Simulated Environment Accelerated Testing: Predict Long-Term Performance For projects with high durability requirements, carbonation resistance can be verified through simulated environment accelerated testing. A carbonation test chamber is used to simulate outdoor environmental conditions such as carbon dioxide concentration, temperature, and humidity, accelerating the carbonation process to predict the long-term carbonation resistance of GRC products. Qinglong's provincial-level R&D center is equipped with professional carbonation test chambers capable of conducting 1000-hour accelerated carbonation tests on GRC products. Test results show that the carbonation depth of the products increases slowly, and core performance remains stable throughout a 20-year service life. Through accelerated testing, the carbonation resistance of GRC products in different climate zones can be directly assessed, providing a scientific basis for project selection.

#On-Site Inspection of Past Projects: Directly Observe Usage Condition Inspecting the condition of a manufacturer's past outdoor projects is a practical method for verifying carbonation resistance. Focus on outdoor GRC projects that have been in use for more than 5 years, and observe whether the component surfaces show carbonation phenomena such as powdering, cracking, or discoloration. The GRC curtain wall panels of Qinglong's Third-Front Construction Cultural Tourism Project in Panzhihua, Sichuan, have been used in outdoor environments for many years; on-site inspection shows no powdering or cracking on the surface and no noticeable strength loss, fully verifying their carbonation resistance. In addition, outdoor GRC projects such as the Mingyue Lake European Style Town in Nanning and the Sanya Festival Plaza all directly demonstrate the carbonation resistance of Qinglong products, providing real references for customers.

#Material and Process Analysis: Indirectly Assess Carbonation Resistance Potential The carbonation resistance of GRC products is closely related to material formulation and production processes. Quality GRC products use high-grade cement, quality aggregates, and a sufficient amount of alkali-resistant glass fiber, combined with high-pressure vibration and constant-temperature curing processes to ensure a dense internal structure and reduce carbon dioxide penetration channels. Qinglong's optimized GRC mix incorporates mineral admixtures such as silica fume to improve material density; high-pressure spray molding and steam curing are adopted in production to further enhance carbonation resistance. If a manufacturer uses low-grade cement and simplified production processes, the carbonation resistance of its products is often poor, so choose with caution.

Verifying the carbonation resistance of GRC products requires combining authoritative test reports, accelerated testing, on-site inspection, and process analysis. Qinglong Group always regards durability as a core product indicator, ensuring the long-term stable use of GRC products in outdoor environments through material optimization, process upgrades, and rigorous testing. Choosing GRC products with excellent carbonation resistance can effectively extend project service life and reduce later maintenance costs.