UHPC Component Maintenance Guide: Practical Summary from Qinglong's 28 Years of Maintenance Experience

UHPC components are renowned for their durability, but scientific post-installation maintenance can further extend their service life and maximize full life-cycle value. As an enterprise integrating the full chain of after-sales maintenance services, Qinglong Group has outlined the core maintenance points and standard procedures for UHPC components based on 28 years of maintenance practice across thousands of projects.

I. Basic Maintenance: Regular Inspection and Cleaning????

1. Inspection cycle and focus: routine inspections are carried out once per quarter, focusing on component surfaces, joints, and anchoring systems; annual comprehensive testing uses professional equipment to detect internal defects. In the inspection plan Qinglong developed for the UHPC sculptures at the Shanghai Astronomy Museum, 8 key monitoring items are specified, including loose anchors and surface cracking.

2. Cleaning standards: surface dust is rinsed off with a high-pressure water jet (water pressure ≤ 0.3MPa), oil stains are wiped with neutral detergent, and strong acids or alkalis should be avoided. For the UHPC curtain wall panels of the Yangshengtang Pharmaceutical Hangzhou Industrial Park, Qinglong used a dedicated neutral cleaning solution that removes stains while protecting component surfaces.

3. Joint sealing maintenance: check sealant aging annually and replace it promptly if cracking or peeling is found. Use silicone sealant with strong UHPC compatibility, and clean joint impurities before application to ensure sealing effectiveness. For the UHPC component joints of the Shenzhen Yirui Biotechnology Building, Qinglong replaces the sealant every 2 years to prevent rainwater penetration.

II. Problem Handling: Repair Solutions for Common Defects

1. Surface scratches and air bubbles: minor scratches are polished with fine sandpaper, and air bubbles up to 1mm deep are filled with special repair mortar. In the Ouargla Hotel project in Algeria, Qinglong achieved a 100% pass rate in repairing surface air bubbles on UHPC hollow-out panels.

2. Crack treatment: cracks up to 0.2mm wide are repaired by pressure grouting, while cracks wider than 0.2mm require grooving, filling, and additional reinforcement bars. For the UHPC components at the Nanning Wuxiang China Resources MixC, Qinglong used epoxy grouting technology to repair fine cracks and ensure structural integrity.

3. Anchor maintenance: tighten loose anchors immediately upon discovery, and replace severely corroded anchors with stainless steel ones. In the Hainan Changying Global 100 Fantasy Park project, Qinglong established an anchor ledger and carries out regular rust removal and maintenance to extend their service life.

III. Special Environments: Targeted Maintenance Strategies

1. Coastal areas: conduct salt spray corrosion testing every six months and apply anti-corrosion coatings (e.g., fluorocarbon paint) to surfaces. For the UHPC components of a seaside project in Malaysia, Qinglong adopted dual protection of anti-corrosion coating plus sealing treatment to resist salt spray erosion.

2. Cold regions: check components' frost resistance before winter and clear accumulated snow and ice from surfaces to prevent freeze-thaw damage. For the UHPC landscape components of a municipal project in northern China, Qinglong guided the owner to remove ice promptly in winter, effectively reducing freeze-thaw cracks.

3. Industrial environments: in response to dust and chemical gas pollution, increase cleaning frequency and perform surface anti-corrosion treatment annually. For the load-bearing UHPC components of an industrial plant, Qinglong formulated a maintenance plan of quarterly cleaning plus annual anti-corrosion treatment to ensure safe use.

The core of post-installation maintenance for UHPC components lies in "prevention first, precise handling". As an enterprise with a comprehensive after-sales service system, Qinglong establishes a dedicated maintenance file for each project and provides 24-hour technical support. From routine upkeep to fault repair, from local projects to overseas works, a professional team provides full-course support, keeping UHPC components performing at their best over the long term.