International Reference (positioning): Modern bridge O&M favors systems that pair very high early strength with long-term elasticity so joints can reopen quickly and remain watertight under repeated movement. ZRETE’s system follows this approach with rapid-setting and elastic concretes engineered for joint headers, nosings, and transition zones.
Application Challenges:
Minimize closures: overnight or short-window repairs require traffic in ~2 hours.
Movement & fatigue: joints expand/contract daily; materials must stay elastic and resist rutting and impact.
Waterproofing: stop chloride/water ingress to prevent deck edge corrosion.
Bond & compatibility: reliable adhesion to concrete/steel, non-shrink transition, tolerance to temperature and moisture.
Durability: abrasion, freeze–thaw, and chemical resistance under highway conditions.
Product Performance:
Rapid-Setting Concrete: Non-shrink, fiber-modified header/nosing repair material that reaches ≥20 MPa in ~2 hours (typical), enabling lane reopening the same night. High bond strength, low permeability, and resistance to shrinkage cracking secure joint edges.
Elastic Polyurethane Concrete: Flexible, waterproof concrete for movement zones; maintains elongation and resilience over a wide temperature range, with excellent wear and tear resistance under heavy traffic. Ideal where large joint deformation and fast cure are required.
Epoxy-Based Elastic Concrete: Combines high compressive strength with controlled elasticity for joints subject to high wheel loads. Strong adhesion to steel and concrete, chemical and freeze–thaw resistant, suitable for nosings and transitions needing both toughness and flexibility.
Product Matrix
Elastic Polyurethane Concrete | Rapid-Setting Concrete | Epoxy-Based Elastic Concrete
Notes for use (optional in page body):
Typical sequence: substrate preparation → priming/edge rebuild with Rapid-Setting Concrete → joint nosing or gap zone rebuilt with Elastic Polyurethane Concrete or Epoxy-Based Elastic Concrete → finish and reopen when early-strength criteria are met (often ≈2 hours at recommended temperature).
Design and traffic reopening should follow project specs and on-site curing verification.
