SOUTHEAST ASIA CONSTRUCTION16 Sep 2020
Mapei systems chosen for Beijing Daxing International Airport
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Inaugurated in 2019, Beijing’s new airport is set to become the largest in the world in terms of passenger numbers. It is well connected to the local high-speed railway network, and will help reduce congestion at the Beijing Capital International Airport (on the northeastern edge of the city).

The new airport - located in the Daxing district, about 46 km south of the centre of Beijing - is capable of handling approximately 45 million passengers per year. The airport capacity is expected to rise to 72 million by 2025 and to 100 million by 2040.

This large-scale development was designed by the Joint Design Team, comprising Zaha Hadid Architects, ADP Ingénierie (ADPI), Beijing Institute of Architectural Design (BIAD), and China Airport Construction Group Corporation (CACC). Main contractor on the project was China Construction Eighth Engineering Bureau.

The building features six wings extending from the central nucleus, and a large central piazza set over various levels. Designed to be energy efficient and environment-friendly, with a high level of flexibility to accommodate future growth, the airport provides a total surface area of 700,000 sq m - which, with the eight runways and other service areas, amounts to 1.4 mil sq m.

A self-sufficient energy supply comes from photovoltaic panels around the perimeter of the structure, while pumps feed recovered geothermal heat into a central heating system. A water management system to collect rainwater is also part of the design and any excess water is directed into new wetlands, lakes and rivers to prevent flooding and to counteract the airport's ‘heat-island’ effect during the summer.

Coating the carpark floor

In this project, Mapei was asked by the main contractor to supply cutting-edge systems for the floor surface of the carpark at the airport’s west wing. The area has more than 5,000 parking spaces, 600 of which with charging points for electric cars.

To start off, the concrete substrate had  to be thoroughly cleaned. Then, the surface was primed by applying a coat of Mapefloor I 900 (a two-component epoxy binder) with a roller to completely fill all the pores. After that, the second coat of Mapefloor I 900 was applied, fillerised with Quartz 0.5 quartz sand.

Later, a seamless surface coating of Ultratop - an ultra-fast setting, self-levelling mortar - was applied to give the floor surface an attractive finish and high resistance to abrasion.

Around 80,000 sq m of the carpark area were coated with Ultratop. This particular job was said to be the most extensive of all the work carried out so far with this product. Its performance properties met with the full approval of the client and designers, which convinced Mapei to propose the product for the next projects planned for the airports in Xiamen, Chengdu and Urumqi.

The Ultratop self-levelling mortar features special hydraulic binders for abrasion-resistant floorings. It is used internally in public and industrial buildings, for levelling and smoothing new or existing concrete and ceramic substrates in thickness from 5 to 40 mm, to make them suitable for heavy pedestrian use in shopping centres, offices, shops, showrooms and areas where rubber wheeled vehicles are in use.

Ultratop offers high mechanical strength and resistance to abrasion. Thanks to its versatility, the system  is also ideal for numerous applications in the decorating sector of buildings for civil use.

Note: The article courtesy of Realta Mapei International no. 78