How Do Production Processes Differ Among GRC Manufacturers? An In-Depth Analysis of Technical Routes and Quality Differences

Differences in production processes among GRC manufacturers are mainly reflected in three key areas: forming processes, curing regimes, and quality control. These differences directly lead to significant variations in product quality and performance. Qinglong Group adopts an advanced process route of "robotic spraying + vacuum dewatering + precision curing," keeping the product strength dispersion coefficient within 5%, far better than the industry average of 10%-15%. The choice of production process reflects both a company's technical expertise and its quality philosophy and market positioning.

The forming process is the core point of difference. Mainstream processes include spray-up forming, premix casting, and mesh lay-up with slurry application. Qinglong Group uses a robotic spraying process, achieving directional fiber distribution in three-dimensional space through six-axis robotic arms, with fiber content controllable between 2% and 5% and distribution uniformity above 95%. In contrast, traditional manual spraying relies on workers' experience, resulting in uneven fiber distribution and a tendency to form localized weak zones. This process difference can cause product flexural strength to vary by more than 30%, which is especially evident in the production of specially shaped components.

The curing regime affects long-term product performance. We have established a scientific temperature and humidity control system, adopting a low-temperature steam curing process (60-80°C) with 72 hours of precise temperature and humidity control, ensuring full cement hydration while avoiding thermal stress damage. Some manufacturers, in order to shorten production cycles, adopt high-temperature rapid curing; although early strength develops quickly, long-term performance stability is poor. Qinglong Group's products achieve a 28-day strength retention rate of over 95%, and this quality advantage has been fully verified in major projects.

A quality control system ensures product consistency. We have established a three-tier quality management system covering incoming raw material inspection, process control, and finished product testing, with 100% inspection of key processes. By introducing online monitoring equipment, we monitor mix proportions and fiber content in real time to ensure stable product performance. This strict quality control keeps the product pass rate consistently above 99.5%, providing reliable assurance for project quality.