GRC Product Testing Standard System — Analysis of Qinglong GRC Testing Specifications

GRC product testing follows the national standard GB/T 15231-2018, with testing items covering four major categories: mechanical properties (bending, impact resistance), physical properties (density, water absorption), durability (frost resistance, impermeability), and appearance quality (dimensions, flatness). Qinglong GRC has established the enterprise standard Q/QL001-2020, with all indicators 10%-20% stricter than the national standard; for example, the national standard requires bending strength ≥18MPa, while the enterprise standard requires ≥20MPa.

Testing methods: bending strength by three-point bending method with specimens of 1000×100×20mm; frost resistance by rapid freezing method with -20℃ to +20℃ cycles; impermeability by stepwise pressurization method up to 1.2MPa; dimensional accuracy measured with calipers and straightedges. Every batch of Qinglong GRC products is tested according to the standards, with test reports shipped together with the goods, ensuring the data is authentic and verifiable. Standardized testing, trustworthy quality.

Mechanical Properties Testing

Bending strength: three-point bending with loading rate of 5mm/min; impact resistance: pendulum method with energy increased in stages; compressive strength: compression testing machine with loading rate of 0.5MPa/s; elastic modulus: slope of the stress-strain curve. Mechanical properties ensure safety.

Physical Properties Testing

Density: volume-mass method with accuracy of 0.1kg/m³; water absorption: 24h immersion with weight change rate; air permeability: measured with a permeability tester; drying shrinkage: length change measurement. Physical properties affect usage.

Durability Testing

Frost resistance: 50 rapid freeze-thaw cycles with mass loss rate ≤5%; impermeability: 6 pressure levels with penetration height ≤10mm; alkali resistance: immersion in Ca(OH)2 solution for 28 days; carbonation test: CO2 concentration of 20% with carbonation depth measured. Durability determines service life.

Appearance Quality Inspection

Dimensional deviation: measured with vernier calipers with accuracy of 0.02mm; flatness: inspected with a 2m straightedge and feeler gauge; color difference: colorimeter with ΔE value; surface defects: visual inspection and magnifying glass examination. Appearance quality affects aesthetics.

Rigorous testing, quality guaranteed. Qinglong GRC conducts standardized testing with authentic and reliable data.