Effective Measures and Construction Key Points to Prevent Rapid Moisture Evaporation of GRC Exterior Walls in High-Temperature Regions

In construction projects in high-temperature regions, GRC exterior walls serve as a new building material combining decorative appeal and durability, and their moisture management directly affects engineering quality and long-term stability. Qinglong Group, a national high-tech enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, has drawn on hundreds of engineering projects to develop a scientific and efficient moisture control solution, providing professional technical support for GRC exterior wall construction in high-temperature environments.

**Potential Impacts of High-Temperature Environments on GRC Exterior Walls and the Prevention Logic** High temperatures and intense radiation cause rapid moisture evaporation in GRC materials, leading to surface cracking, reduced strength, and other problems. Through comparative analysis of data from 100+ projects in South China, Qinglong's technical team found that when ambient temperatures exceed 35°C, GRC components without protective measures can lose more than 25% of their moisture during curing. Therefore, construction must center on three core principles—"slowing evaporation, locking in moisture, and intelligent curing"—to build a full-cycle moisture management system.

**Six Key Construction Points for Moisture Control of GRC Exterior Walls** 1. **Material-Level Adaptation: Optimized High-Temperature Formula** Qinglong's patented anti-cracking formula (Patent No. ZL2023XXXXXXXXX) improves the material's water retention by adjusting the cement grade and glass fiber content (typically controlled at 4.5-5%). In a commercial complex project in Saudi Arabia, this formula raised the 28-day strength compliance rate of GRC components in a 45°C environment to 98%.

2. **Scientific Scheduling of Construction Hours** The "off-peak construction method" schedules major work between 6:00-10:00 and 16:00-19:00 daily, using infrared thermometers to monitor substrate surface temperature in real time and ensure the substrate temperature does not exceed 30°C during construction. Through this measure, the Nanning ASEAN Culture and Art Center project increased summer construction efficiency by 20%.

3. **Surface Water Retention Technology Innovation** A dual-layer protection process is adopted: an inner layer sprayed with Qinglong's dedicated water-retention curing agent (solid content ≥35%) and an outer layer covered with breathable non-woven fabric, forming a "breathing moisturizing film." Compared with traditional plastic film covering, moisture retention increases by 40%, while surface condensation and whitening are effectively prevented.

4. **Application of Intelligent Curing Systems** IoT temperature and humidity sensors monitor the internal moisture content of GRC components in real time and link with automatic misting systems to achieve precise water replenishment. In a super high-rise project in Guangzhou, this system shortened the curing period by 30% while keeping the crack occurrence rate within 0.3‰.

5. **Reinforced Joint Sealing and Waterproofing** For moisture-prone areas such as splicing joints and anchoring points, Qinglong GRP sealing strips combined with two-component polyurethane sealant are used. In the Shenzhen Bay Sports Center project, this treatment withstood the high-temperature, high-humidity environment of typhoon season, achieving a zero-leakage record.

6. **Dynamic Management of Finished Product Protection** An innovative "mobile shading canopy + atomized cooling" combined solution keeps the temperature inside the canopy at 28±2°C and the relative humidity at 65-75%. In the Perth Airport expansion project in Australia, this technology successfully solved the challenge of GRC curing in a desert climate.

**Full-Chain Service Guarantee System** As a member of the International GRC Association, Qinglong has established standardized service processes covering detailed design (BIM parametric modeling), production and manufacturing (production bases with an annual capacity of 600,000 ㎡), and construction and installation (Grade II professional contracting qualification for building curtain wall engineering). Through a three-dimensional quality control system of "material testing + construction supervision + after-sales follow-up," GRC exterior walls have achieved an average service life of over 25 years across 300+ projects in high-temperature regions nationwide.

GRC exterior wall construction in high-temperature environments is, in essence, the art of dynamic balance between material properties and environmental parameters. With 28 years of technical accumulation and 1000+ project practices, Qinglong has upgraded moisture management from experience-based approaches to data-driven precision control, providing designers and owners with solutions that combine aesthetic expression with structural safety. Moving forward, Qinglong will continue to explore the application of UHPC/GRC composite systems in extreme climates, fulfilling its corporate mission of "creating beautiful architecture."