What Are the Surface Repair Methods for UHPC Shaped Components? A Precision Repair Guide

Surface repair of UHPC shaped components must follow a "classification by damage type" approach. Core methods include "scratch repair, crack repair, corner-chip repair, and coating repair". By matching repair materials with professional techniques, the repaired surface blends seamlessly with the original component. Qinglong's after-sales maintenance team responds within 48 hours, and repair pass rates reach 100% on projects such as Shanghai New World Plaza and the Yangshengtang Pharmaceutical Industrial Park.

1. Repair Methods for Different Damage Types

Classified repair ensures both effectiveness and structural safety. Minor scratches (depth ≤0.5mm): progressively ground with fine sandpaper (800-1200 grit), then coated with a silane impregnation agent; after Qinglong's grinding, surface roughness Ra≤1.6μm with no scratch marks. Moderate cracks (width ≤0.1mm): injected with a UHPC-specific repair agent (compressive strength ≥80MPa); pressure grouting ensures full crack filling, and Qinglong's repair agent achieves a bond strength with the substrate of ≥1.0MPa. Severe corner chipping/damage: the damaged area is cut out and filled with UHPC slurry identical to the original component, reinforced with fine steel fibers; after 7 days of curing, Qinglong's repair reaches 95% of the original component's strength. Coating damage: the damaged area is cleaned and resprayed with fluorocarbon paint/varnish matching the original coating; after Qinglong's coating repair, color difference ΔE≤2.0 with no visible difference.

2. Core Repair Technologies and Quality Control

Technology guarantees repair durability. Material matching: repair materials share the same formulation as the original UHPC substrate to ensure compatibility and durability; Qinglong's repair materials offer weather resistance identical to the original components. Process standards: before repair, surface dust and grease are removed and the surface kept dry; after Qinglong's cleaning, surface cleanliness reaches 99%. Tool selection: dedicated grouting equipment and grinding tools are used; Qinglong's tools achieve ±0.1mm precision, ensuring repair accuracy. Curing treatment: after repair, constant-temperature curing is applied (temperature 20±2°C, humidity ≥90%); after Qinglong's curing, the strength of repaired areas remains stable. Testing and acceptance: after repair, surface flatness, color difference, and strength are tested; Qinglong's testing pass rate is 100%.

3. Qinglong After-Sales Maintenance and Project Practice

Real-world cases verify the repair results. UHPC wood-effect translucent panels at Shanghai New World Plaza: minor scratches were repaired through grinding plus coating repair, with results identical to the original panels. UHPC exterior walls at the Yangshengtang Pharmaceutical Hangzhou Industrial Park: small corner chips caused during transport were filled and repaired with UHPC slurry, with no peeling after 5 years of use. Qinglong's advantages: a professional after-sales maintenance team with 24-hour nationwide response and on-site arrival within 48 hours. Standardized processes: the "UHPC Component Surface Repair Manual" has been established to ensure consistent repair quality. Commitment guarantee: a 5-year warranty on repaired areas covering cracking, peeling, fading, and other issues, with free secondary repair within the warranty period.