Polyurethane Elastic Concrete (PEC) – Comprehensive Technical Overview
Product Overview
Polyurethane Elastic Concrete is a high-performance organic-inorganic composite material, primarily used for rapid repair and maintenance of transportation infrastructure such as roads, airports, and bridges. Originally developed for military applications, it now sees widespread civilian use in high-traffic areas requiring fast turnaround and durability.
Raw Material Composition of MST Polyurethane Elastic Concrete
Polyol Resin (Component A)
Isocyanate Hardener (Component B)
Graded Aggregate (Component C): Specially selected mineral aggregates (e.g., quartz sand) optimized for density and mechanical performance.
|
Property |
Value / Description |
|
Physical state |
Powder, Solid |
|
Color |
Grayish white |
|
Odor |
Almost odorless |
|
Odor threshold |
No data available |
|
pH |
Not applicable |
|
Freezing point |
Not applicable |
|
Boiling point (760 mmHg) |
> 1000 °C |
|
Flash point |
Not applicable |
|
Evaporation rate |
Product is a non-volatile solid |
|
Flammability (solid, gas) |
Not flammable |
|
Self-heating ability |
This is not a self-heating substance |
|
Lower explosion limit |
No hazard is anticipated based on our experience with this product and knowledge of its composition, provided it is used properly and within its intended application. |
|
Upper explosion limit |
No hazard is anticipated based on our experience with this product and knowledge of its composition, provided it is used properly and within its intended application. |
|
Thermal decomposition |
Will not decompose if stored and handled as prescribed. |
|
Vapor pressure |
Not applicable |
|
Bulk density |
Approx. 1,700 - 1,900 kg/m (20°C) |
|
Water solubility |
Insoluble |
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Auto-ignition temperature |
Will not combust |
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Explosive properties |
Non-explosive |
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Oxidizing properties |
No data available |
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Viscosity |
Not applicable |
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Please note ：The physical data provided above are typical values and should not be construed as a sales specification. |
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Key Characteristics
Rapid Curing: Traffic-ready in 2–4 hours
High Impact Resistance: Withstands heavy and tracked vehicle loads
Elasticity: Absorbs dynamic loads, reduces fatigue cracking
Waterproofing: Excellent impermeability and sealing properties
Durability: Resists UV, ozone, and temperature extremes (-40°C to +120°C
Strong Adhesion: Bonds effectively with concrete, asphalt, and steel
Ease of Application: Cold-mix, no heating required; manual or mechanical mixing
Technical Performance Data
|
Property |
Value |
Standard |
|
Compressive Strength (2h) |
≥15 MPa |
GB/T 17671-1999 (ISO) |
|
Flexural Strength (2h) |
≥6 MPa |
|
|
Compressive Strength (24h) |
≥25 MPa |
|
|
Flexural Strength (24h) |
≥9 MPa |
|
|
Bond Strength (to concrete) |
≥2.5 MPa |
|
|
Abrasion Resistance |
<200 mm³ |
|
|
Elastic Modulus |
10,000–15,000 MPa |
Construction Process
Surface Preparation: Mandatory abrasive blasting to SSP-SP3/CSP-3 standard. Surface must be clean, dry, and sound.
Mixing:
Mix A + B for 1 minute
Add C and mix for 3–5 minutes until fully coated
Pot life: 15–25 minutes
Installation: Pour, spread, and trowel to compact and level. Minimum 12 mm thickness under steel joints.
Curing: Ambient cure; traffic-ready in 2–4 hours depending on temperature
Advantages & Limitations
Advantages:
Ultra-rapid opening to traffic
Exceptional durability and fatigue resistance
Low life-cycle cost despite higher initial cost
Applicable in wide temperature range
Limitations:
Higher material cost than conventional solutions
Requires strict surface preparation and mixing procedures
Lower fire rating than cementitious materials
Comparison with Competing Materials
|
Material |
Advantages |
Disadvantages |
|
PEC |
High elasticity, impact resistance, fast cure |
Higher cost, sensitive to installation |
|
Epoxy Concrete |
High strength, chemical resistance |
Brittle, poor UV resistance |
|
Rapid-Hardening Cement |
Low cost, fire resistance |
Brittle, prone to shrinkage cracking |
|
Steel-Fiber Concrete |
High strength |
Poor impact resistance, difficult to place |
Life-Cycle Cost Analysis
PEC has a higher initial cost but significantly lower long-term costs due to:
- Reduced frequency of repair
- Minimal traffic disruption costs
- Long service life (10+ years)
Application Fields
- Airports: runways, aprons, hangars
- Highways: expansion joints, pavement repairs
- Urban roads: rapid repairs, bridge decks
- Cold storage: low-temperature flooring
-
Industrial flooring: warehouses, factories
Conclusion
Polyurethane Elastic Concrete is a specialized high-performance material ideal for applications demanding rapid turnaround, high durability, and resistance to dynamic loading. Its value lies in reducing life-cycle costs and minimizing operational disruptions, making it the preferred choice for critical infrastructure maintenance.
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