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| Brand Name: | SEASTAR |
| Model Number: | Customizable according to requirements |
| MOQ: | 20m³ |
| Price: | 252 USD/tons (Current price) |
| Payment Terms: | spot goods and spot payment |
| Supply Ability: | 2000 tons/month |
Rock Wool Boards Used In Bridge And Road Construction With Excellent Thermal Insulation Properties
Rock wool boards, high-performance inorganic thermal insulation materials, offer substantial benefits in tunnel and bridge pavement projects, with core value rooted in structural protection, performance optimization, and safety assurance. Their versatility addresses both common and scenario-specific challenges in these infrastructures.
Benefits
Fundamentally, rock wool boards tackle shared pain points across tunnels and bridges. First, their exceptional thermal insulation—derived from molten basalt fibration and closed air pockets—shields structures from temperature extremes. In winter, it prevents frost heave cracking by stopping water seepage from freezing; in summer, it cools bridge pavement bases to avoid asphalt softening, extending service life. Second, as Class A non-combustible materials (per GB 8624-2012), they outperform organic alternatives like polystyrene. Resistant to fire (softening point ~700℃) and free of toxic emissions, they act as critical fire barriers: in tunnels, they delay concrete/steel damage during fires, buying evacuation time; in bridges, they halt fire spread to the main structure. Third, their inorganic silicate composition ensures chemical stability—resisting acids, alkalis, and aging—preventing corrosion-induced issues like pavement hollowing or tunnel leakage, thus cutting maintenance costs.
Applications
For tunnels, rock wool boards address the unique demands of enclosed spaces. Their sound absorption mitigates traffic noise by 5-10dB, reducing "sound focusing" and neighborhood pollution. When paired with waterproof membranes, they act as moisture buffers, absorbing minor seepage to protect linings from rust and spalling. Fire safety is enhanced further: a 50mm rock wool layer keeps concrete surface temperatures ≤300℃ under 800℃ heat for 1.5 hours, far below cracking thresholds.
For bridge pavements, lightweight and durability are prioritized. With a dry density of 100-180kg/m³ (1/10-1/15 of concrete), rock wool reduces structural load—saving on reinforcement and costs, especially for long spans. It minimizes temperature stress: in summer, it cools bases by 8-12℃ to reduce rutting; in winter, it lessens freeze-thaw damage, extending pavement life by 2-3 years. Post-compaction, its compressive strength (80-150kPa) and elastic recovery resist permanent deformation from heavy traffic, lowering repair needs.
In short, rock wool boards deliver safety, adaptability, and cost-efficiency. Their non-combustibility addresses critical safety risks; their thermal, mechanical, and chemical properties meet tunnel and bridge-specific needs; and their long-term durability offsets higher initial costs. They are now the material of choice for high-stakes projects like highway tunnels and cross-sea bridges, where safety and longevity are paramount.
