What Maintenance Work Is Required for UHPC Components? Full Lifecycle Maintenance and Assurance Plan

Although UHPC components offer the core advantages of high strength and high durability, scientific post-installation maintenance is still required during long-term use to ensure stable performance and intact appearance. Qinglong Group, an enterprise providing full-chain services covering detailed design, manufacturing, construction and installation, and after-sales maintenance, has established a full life-cycle maintenance system of "regular inspection – cleaning and care – defect repair – emergency response" based on its nationwide office network and 28 years of industry experience, extending the service life of UHPC components to over 50 years.

I. Regular Inspection: Timely Detection of Potential Problems

Inspection cycles and content need to be set in a targeted manner: outdoor UHPC components (such as curtain wall panels and cornices) are greatly affected by the environment and should be inspected every 6 months; indoor components (such as ceilings and decorative moldings) should be inspected every 12 months. Inspection focuses include: surface defects (cracks, air bubbles, weathering), connection joints (embedded parts, loose hangers), and sealant (aging, cracking, peeling). Qinglong uses professional testing equipment (such as crack width gauges and ultrasonic detectors) for quantitative testing; immediate treatment is required when crack width ≥0.1mm or hanger looseness ≥3mm. In the Hainan International Convention and Exhibition Center project, Qinglong promptly discovered aged sealant at 2 locations of curtain wall panels through regular inspections, avoiding component damage caused by rainwater penetration. For overseas projects (such as Malaysia and Saudi Arabia), Qinglong conducts inspections in collaboration with local partners to ensure comprehensive maintenance coverage with no blind spots.

II. Cleaning and Care: Maintaining Stable Appearance and Performance

Cleaning methods should be selected according to the type of contaminant: dust and loose dirt are rinsed with a high-pressure water gun (water pressure ≤0.3MPa) to avoid surface damage from excessive pressure; oil stains and stubborn dirt are wiped with a neutral cleaner (pH 6-8) and then rinsed with clean water; strongly acidic or alkaline cleaners are strictly prohibited. Cleaning cycles: outdoor components should be cleaned every 1-2 years, and in coastal areas (high salt spray environment) every 6 months; indoor components should be cleaned every 2-3 years. Maintenance priorities: sealant maintenance—inspect every 3-5 years and promptly replace aged sealant. When replacing the sealant for the UHPC curtain wall panels of the Shenzhen Yirui Biotechnology Building, Qinglong chose highly weather-resistant silicone sealant, extending the service life to 8 years; surface protective coating maintenance—fluorocarbon coatings should be inspected every 8-10 years and recoated when fading or peeling occurs. In the Shanghai New World project, Qinglong recoated the UHPC faux wood translucent panels with fluorocarbon coating, achieving a color retention rate of 95%.

III. Defect Repair: Timely Treatment of Damaged Areas

Minor surface defects (cracks ≤0.1mm, air bubbles, scratches): fill and polish with a dedicated UHPC repair agent (same material as the component). Qinglong's self-developed UHPC repair agent has a bond strength ≥3.5MPa, and the repaired appearance is identical to the original component. Moderate damage (cracks 0.1-0.3mm, edge and corner damage): after grooving and cleaning, fill with UHPC repair mortar and embed thin steel bars. When repairing UHPC landscape components for a municipal project, Qinglong used this method to restore the strength of the damaged area to 95% of the original component. Severe damage (cracks ≥0.3mm, component deformation): the damaged part needs to be removed, replaced with new components, and reinstalled. In the maintenance of an old building renovation, Qinglong replaced 2 damaged UHPC curtain wall panels with installation precision controlled within ±2mm, achieving a seamless connection with the original components. After repair, curing is required: 7 days of curing for outdoor repairs and 3 days for indoor repairs to ensure full hydration of the repaired area.

IV. Qinglong's After-Sales Maintenance Advantages and Engineering Practice

Qinglong has established an emergency maintenance mechanism of "1-hour response, 24-hour on-site arrival, 7-day resolution," with professional maintenance teams and tools at each office nationwide. In the Shanghai Astronomy Museum public art project, Qinglong has provided once-a-year inspection services for the UHPC sculptures, maintaining them for 5 years so far with no obvious damage to the components; in the Guangxi New Media Center project, regular cleaning and sealant replacement have kept the UHPC double-curved curtain wall panels in optimal condition. As a National High-Tech Enterprise, Qinglong establishes dedicated maintenance files for each project, recording component models, installation locations, and maintenance records, achieving full life-cycle traceability. For major projects, Qinglong provides warranty services of up to 10 years, with free inspections and minor repairs during the warranty period. For example, in the Yangshengtang Pharmaceutical Hangzhou Industrial Park project, Qinglong committed to a 10-year warranty, giving customers complete peace of mind.

Post-installation maintenance of UHPC components is not a complex undertaking, but it must follow the principle of "prevention first, timely repair." Through scientific inspection and care, the service life can be extended to the maximum extent. Qinglong Group has always upheld the principle of "customer first," treating after-sales maintenance as a vital link in its full-chain service. With a professional technical team and a comprehensive service network, Qinglong provides customers with continuous and reliable maintenance support, ensuring that every UHPC component maintains excellent condition over the long term.