Airport Runway Crater Repair Material, Airport Airfield Repair Material

Airport runway repair material plays a core role in three critical scenarios—runway slab replacement, apron repair, and rapid crater restoration—thanks to its ultra-early strength and high durability. The material achieves a compressive strength exceeding 20 MPa within 4 hours and surpasses 40 MPa at 24 hours, meeting stringent requirements for both rapid wartime restoration and non-disruptive peacetime construction.

In runway slab replacement operations, the material enables efficient construction through its self-leveling properties. With a slump flow of 240 mm, the slurry autonomously fills voids beneath slabs without vibration, ensuring compaction. The initial setting time is precisely controlled between 45–50 minutes, allowing sufficient window for elevation adjustment, while a load-bearing framework forms just 2 hours after final set. Compared to traditional concrete, its thermal expansion coefficient fully matches the base layer, effectively preventing joint cracking caused by thermal stress.

For apron repair scenarios, the material demonstrates exceptional resistance to fuel erosion. After 180 days of immersion in aviation kerosene, it retains over 92% of its strength. A unique dual-reinforcement system combining steel and polypropylene fibers improves impact resistance by 300%, maintaining surface integrity under frequent ground equipment traffic. Repaired areas show post-8000-cycle wheel tracking tests with flatness deviations consistently below the 2 mm specification limit.

Runway crater repair presents the most demanding conditions. The material adapts to low-temperature construction via composite admixture technology, maintaining normal hydration even at -5°C. Using dedicated mixing equipment on-site, the water-to-binder ratio remains stable at 0.26, with flowability ensuring coverage of 8 m² within 3 minutes. Crater repairs meet emergency aircraft takeoff/landing strength requirements within 4 hours, achieving a bond strength with the base layer of 3.5 MPa—far exceeding the 1.8 MPa benchmark of traditional materials.

The material’s micro-expansion property (expansion rate 0.02%–0.04%) during curing effectively compensates for shrinkage stress, ensuring long-term stability. After 300 freeze-thaw cycles, mass loss is only 0.08 kg/m³, and impermeability remains above grade P12. Dynamic deflection testing shows that repaired areas exhibit deflection deviations within 0.02 mm of adjacent pavement, fully meeting high-precision surface requirements.

Through optimized particle size distribution and reactive mineral admixture technology, this specialized repair material resolves the conflict between early traffic opening and long-term durability. At 56 days, the slurry density reaches 2.40 g/cm³, with a chloride diffusion coefficient below 1.5×10⁻¹² m²/s, delivering a service life in harsh environments over three times that of conventional concrete.