What Work Is Required for the Later Maintenance of UHPC Components?

Post-installation maintenance of UHPC components should establish a scientific "four-in-one" system of "regular inspection, professional cleaning, timely repair, and preventive maintenance" to realize the value of their ultra-long service life (over 50 years). Based on 28 years of maintenance experience and over 10 years of project tracking (e.g., the UHPC roof of the Hainan International Convention and Exhibition Center and the GRC curtain wall of the Wuhan Han Show Theater), Qinglong Group summarizes UHPC maintenance into four major tasks: an annual appearance inspection (cracks, staining), professional cleaning every 3-5 years (neutral detergent), immediate repair of any damage according to contingency plans, and application of a protective coating every 5-10 years (e.g., fluorocarbon topcoat). In the UHPC curtain wall project of the Shenzhen Yirui Biotechnology Building, we developed and implemented a "1-3-5-10" maintenance plan for the client: comprehensive inspection in year 1, deep cleaning in year 3, re-application of protective coating in year 5, and structural testing in year 10. After 5 years of use, the components remain as good as new, with maintenance costs at only 1% of the initial construction cost. Preventive maintenance is the lowest-cost investment.

Regular Inspection: The Eyes and Ears of Maintenance

Establish component archives and conduct an annual panoramic survey using drones + HD cameras, focusing on joints, anchor points, and internal and external corners. Cracks with a width ≥0.2mm or local damage ≥10cm² should be included in the repair plan. Qinglong Group has developed an inspection APP with cloud-based data management for full traceability.

Scientific Cleaning Maintains Aesthetics and Performance

Ordinary dust is rinsed off with a low-pressure water jet (pressure ≤4MPa); stubborn stains are treated with a neutral detergent (pH 6-8) and gently scrubbed with a soft brush. Strong acids and alkalis are strictly prohibited. For coastal projects, we increase the cleaning frequency to once every 2 years to prevent salt crystallization corrosion.

Professional Repair Restores Component Function

Micro-cracks (width<0.2mm) are sealed with a penetrating protective agent; active cracks (0.2-1.0mm) are treated with low-pressure grouting (epoxy resin); for local damage, loose material is chiseled away and repaired with polymer-modified mortar. Qinglong Group has a professional repair team, and materials come from the same source as the original components, ensuring a color difference ΔE≤2.0.

Preventive Maintenance Prevents Problems Before They Occur

Apply a hydrophobic protective agent (such as silicone) to create a "lotus leaf effect" that reduces dirt adhesion. In acid rain areas, apply an acid-rain-resistant coating. We recommend comprehensive maintenance every 5 years for key projects, extending service life by more than 20%.

UHPC maintenance is not a cost burden but asset value preservation. Qinglong Group provides full life-cycle maintenance services to keep your investment appreciating continuously.