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Polished concrete in a stadium concourse sits between pre-match crowd surges, rain on shoes, cart wheels and post-event cleanup, so substrate condition, handover, slip criteria and drainage must be agreed before entry. This guide covers schedule windows, survey, slip targets, drainage, edges, wheel-load zones, repair and acceptance for the contractor project manager and the owner's representative.
Scope covers the main ring concourse, under-stand passageways, ramp landings, rain-entry vestibules, railing edges and cart lanes. Before mobilization the PM checks slab age, joints, patches, cracks and moisture readings; problem zones go into tender assumptions, not argued on site later.
Work runs in blocks tied to the match calendar, not one open floor. Divide the concourse into zones of 150–300 m² per cluster, each with entry, extraction and protection; passages, ramps and vestibules are separate by target. Zones released between fixtures get 5–7 days to wheel traffic; cart lanes reopen after 24–72 hours; no grinding during a live fixture or the 2–3 hour pre-match window.
Before work starts the PM logs every zone: slab age, patches, cracks, joints and repair mortar; soft powdery spots are scheduled for repair, while a CSP 1–2 slab needs exposed-aggregate finish first. The slab cures 28–90 days before polishing; moisture is gauged at depth, probe RH under 75% before densifier. Joints above 3–4 mm and cracks above 1 mm go to repair; mortar cures 7–14 days, window 10–30 ℃ and RH 75–80%.
Concourse floors carry standing crowds of 2–4 persons per m² at peak and evacuation flows of 6–10 persons per m per minute on main routes, so slip criteria are set on dry and wet readings, not appearance. Dry PTV stays ≥36; wet PTV reads 10–20 points below dry; DCOF ≥0.42 on walking zones; wet approaches graded R10–R12. The table lists zone targets with zone, date, reading and sign-off.
| Concourse zone | Crowd level | Slip target | Acceptance record |
|---|---|---|---|
| Main ring concourse | 2–4 persons/m² standing | Dry PTV ≥36; DCOF ≥0.42 | Per 200 m²; PTV logged |
| Under-stand passageway | 6–10 persons/m flow | Wet PTV 10–20 below dry | PTV dry/wet per zone |
| Ramp and landing | Steady flow, rail side | DCOF ≥0.42; R10–R12 wet | Slope and edge checked |
| Rain-entry vestibule | Wet shoe contact | R11–R12 wet zone | Drainage and mat line checked |
Rain is carried in on shoes 3–6 times per match day; the floor must shed it to channels and drains, so check drainage slope at 1–2% toward drains, channels and grates first. Standing water is a drainage or joint problem, not a polish defect; correct slope or seal before slip testing. Wet vestibules and ramp bottoms target a honed, sealed finish; renewal runs 3–5 years for concourse, 2–3 years for high-flow lanes.
Edges along railings, stand fronts and thresholds take heel scuff and cart bump; hand grinding matches the machine finish within 5 gloss units at 60°, over 15 units returning to resin stages. Cove corners at walls and barriers are hand-ground, densified and sealed; skipped low spots show as dull lines in raking light. Thresholds to resin, tile or carpet are flush within 2–3 mm; rail base plates are patched and flush before handover.
Service carts, cleaning machines and trolleys run fixed lanes between fixtures; these zones take wheel wear first and are marked before grinding. Cart lanes target 400–800 grit honed and sealed; main concourse may run 800–1500, display areas 1500–3000 set; overlap is checked after the first 2–3 events. Repair mortar cures 7–14 days before reopening; record lane load and daily trips.
Diamond work runs metal to resin across full passes. Metal bond begins at 16 or 20 grit, then 30 and 40; resin pads follow 100, 200, 400, 800, then 1500 or 3000; scratches left at 800 cannot be covered by 1500. Check each grit under 300–500 lux raking light. Densifier goes on dust-free, 1:64 near 15 ml/L first coat; 1:128 near 8 ml/L second, damp 20–40 minutes, at 10–30 ℃ and RH under 75–80%; gloss differs by at most 5 units, over 15 means rework.
Take the final walk-through with the owner's representative against the tender schedule, numbering defects before correction. Frequent disagreements cover uneven reflection, white haze left by densifier, wet-zone grip and scratches once cart wheels return. The operator agreement covers access hours, seating and concession protection, noise and dust limits, and who signs each release.
On delivery provide the finish plan, grit order, product names and dilution ratios, joint treatment, measurement logs and a maintenance note. Walk the concourse with the representative and point out the inspection spots. Verify every zone holds a signed record; open items carry a date and owner. The wear layer compacts over the first 6–12 months; dull patches in cart lanes are normal wear.
Written and reviewed by JOY TECH - an SGS & BV audited, CE/RoHS certified diamond tools manufacturer founded in 2004, exporting to 50+ countries.
Our factory and quality management system are audited by SGS and Bureau Veritas. Products meet CE/RoHS requirements and every piece is 100% inspected before packing.
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