Application of Wirtgen cement concrete pavement，With its significant advantages of efficiency and flexibility，It has won wide acclaim in the global airport construction projects.。Recently，We share the wonderful case of how Wittgen's double-layer concrete paving technology shines brilliantly in the construction of Berlin Airport.（Click here to learn more）。
Now，Let's turn our attention to the construction site of Ulan Bator Airport in Mongolia.，Through this vivid example,，Fans continue to explore the mature application and extraordinary charm of Wirtgen's double-layer concrete paving technology.。
Face the weather，Construction is urgent
Ulaanbaatar，The hub of Mongolia's economy and trade，The modernization and upgrading of its airport is of immeasurable value for promoting the development of the country.。At the same time，Ulan Bator is also the coldest capital city in the world.，Often need to face short.、Hot summer and long、Such extremes as cold winters.，So，Only 3 to 4 months of construction in the summer。The new Ulaanbaatar International Airport，Short name NUBIA，It is planned to carry 3 million passengers per year.，This means that the number of passengers will increase by three times.，Cargo loading and unloading will increase by 10 times。
The new airport was designedHave a 3600 m Long、4E Grade standard concrete runway，Strong and stable，Designed to cope with severe weather，Welcome Boeing 747、AirbusAThe take-off and landing of 340 and other large passenger aircraft。No doubt about it，In the face of extreme continental climate、Limited construction period and increasing demand for air transportation，The construction of the new airport is not only a contest of technology.，It is also a severe challenge to time and efficiency.。
In such a grand and urgent project,，The project uses its trusted Wittgen slipform paving technology.，ThroughApplication of double-layer concrete paving，It not only greatly improves the construction efficiency,，But also ensures the stability and durability of the runway structure.。Wittgen SP 1600 and SP 500 with its superior performance and reliability，It has become the backbone of the pavement construction.。
Taken in August 2015. NUBIA Project panorama：The new Ulaanbaatar International Airport is only 52 miles from the capital km，And has a 3600. m Long 4E Grade II concrete runway
Precise、Efficient paving construction
SP The Wirtgen 1600 is the best of the big slipform Pavers.，By means of the second set of concrete spreading moulds equipped with it，Realized“One-time paving and forming double-layer cement concrete pavement”。The runway width of the new airport is 45 m，Length 3600 m， SP 1600 Average paving width each time is 11.25 m，The total paving thickness is 38 cm。
First，Paving 27 cm Thick cement concrete lower surface course，Immediately thereafter“Wet on wet”Paving 11 cm Thick cement concrete upper surface course，Realize the ideal combination of the upper layer and the lower layer。According to the design requirements of the airport，Add continuous rebar mesh between two layers of material，To improve the strength of the plate.。
This kind“Wet on wet”The way of paving，The seamless connection between the upper and lower layers of concrete is ensured.，Enhance the overall strength of the plate。At the same time，48 high-frequency electric vibrators ensure the uniform vibration and compaction of concrete.，It has laid a solid foundation for the subsequent construction.。
Due to the strong wind and the scorching sun in the Gobi Desert, the concrete will dry rapidly.，Therefore, it cannot be used during the day. SP Paving of concrete at 1600
Coming up，Installed in SP The surface of the concrete is repaired and treated by the screed beam and super screed behind the 1600.，And improve that flatness and the surface effect.。Then use the curing and napping machine to finish the work.，First, use the napping machine to pull out the texture of the plate surface.，So as to meet the anti-skid effect of the road surface.。Catch，Pray curing agent on the road surface for curing。
The project construction is carried out in an orderly manner.：Efficient Wittgen SP 1600 is mostly constructed from 7 P. M. to 6 A. m.，Pave one with an average thickness of 38 cm Double concrete pavement
Besides SP 1600 shines brilliantly in the construction of the main runway，Wittgen's SP The 500 also demonstrated its flexibility and efficiency in the apron and taxiway areas of the project's minor bends.。This model has excellent maneuverability and precise paving ability.，Successfully completed 5 bars of width 5.625 m Adjacent plate paving task，A total of about 50000 was laid. ㎡ Taxiway and 7500 ㎡ The tarmac area。
Wei has something to say
Success of New Ulaanbaatar International Airport Expansion Project，It is another proof of the maturity of double-layer concrete paving technology.。It not only demonstrates the excellent performance of this technology in harsh conditions.，It also provides valuable experience and inspiration for domestic and global airport construction.。
At present，China civil airport pavement cement concrete double-layer paving technology test has been successfully implemented in Shandong Jinan Yaoqiang International Airport East Airfield Road Project.（Click on the image below for more information）。Future，We look forward to this flexibility.、The efficient process can be more widely used in China.，Further reduce the cost for the construction party，Potential opportunities for improving efficiency。
