The Improvement Effect of Admixtures on GRC Performance and an Analysis of Prohibited Admixtures

"GRC Admixtures: Merits and Prohibitions — A Complete Analysis of Enhancement Logic and Prohibited Red Lines"

GRC's performance ceiling depends half on the material mix and half on the precise selection of admixtures—this is one of Qinglong's core insights from 28 years of deep engagement in the GRC field. As a national-level high-tech enterprise that participated in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong has seen too many cases of GRC component cracking and detachment caused by wrong admixture choices, while also leveraging precise admixture application to create GRC curtain walls and landscape components that combine aesthetics and durability for over a thousand high-end projects (such as grand theaters, commercial complexes, and landmark buildings).

### Three Major Ways Admixtures Improve GRC Performance, Verified by Qinglong's Technical Team in Practice

Admixtures are not just icing on the cake; they are the key lever for breakthroughs in GRC performance. Through 28 years of hands-on project work and R&D, Qinglong's GRC technical team has summarized three core functions of admixtures: First, optimizing workability—in the production of GRC components with complex shapes (such as double-curved exterior wall cladding panels and special-shaped landscape sculptures), water reducers and plasticizers significantly reduce slurry viscosity and improve fluidity, allowing GRC to easily adapt to designers' creative schemes; this is one of Qinglong's core advantages in undertaking a large number of high-end custom projects. Second, strengthening mechanical properties—specialized fiber bonding agents enhance the bond between glass fibers and the cement matrix, keeping Qinglong GRC's flexural strength consistently above 20MPa, far exceeding the industry's baseline standards. Third, improving durability—for different regional environments such as freeze-thaw cycles in the north and high-humidity salt fog in the south, Qinglong's customized frost-resistant and anti-corrosion admixtures extend the service life of GRC components and reduce later maintenance costs.

### Three Categories of Prohibited Admixtures for GRC: How Qinglong's Quality Inspection System Avoids the Pitfalls

Not all admixtures are suitable for GRC; Qinglong's rigorous quality inspection system has long defined three categories of prohibited red lines: First, chlorine-containing admixtures—these corrode glass fibers and greatly reduce GRC's tensile strength; Qinglong tests the chloride ion content of every batch of raw materials to ensure compliance with national-level standards. Second, inferior air-entraining agents—excess air bubbles cause a sharp drop in GRC strength; Qinglong refuses to use cheap general-purpose air-entraining agents and instead customizes air-entraining solutions based on project requirements. Third, "quick-acting strengtheners" of unknown composition—these products boost strength in the short term but cause component cracking and detachment over time; Qinglong insists on using compliant admixtures verified through R&D, safeguarding GRC's long-term stability with 58 patented technologies.

For GRC, admixtures are a "double-edged sword": choose the right one, and you unlock GRC's performance potential; cross a prohibited red line, and you plant long-term risks in the project. As a GRC manufacturer offering full-chain services covering detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong can provide designers with technical support for admixture compatibility to realize complex shapes, and provide developers and general contractors with full-cycle quality control—from raw material selection to finished product delivery—ensuring the safety and durability of GRC projects. In the application of GRC materials, a professional full-chain supplier creates far more value for a project than a single product alone.