Construction of China’s tallest building stopped because of corrosive salt in concrete

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Ping’an International Finance Centre

Scheduled to be the tallest tower in China and the second tallest building in the world by 2015, Kohn Pedersen Fox’s 660-meter-high Ping’an International Finance Center has received a major unexpected set back.

Following an industry wide inspection conducted last week, Shenzhen government officials have discovered a low-quality sea sand has been used by developers to create substandard concrete for KPF’s supertall skyscraper and at least 15 other buildings under construction.

Although sea sand lures contractors by costing much less than standard river sand, it has a deadly mixture of salt and chloride that corrodes steel in concrete and threatens the structural integrity of a building over time.

According to Bloomberg, Shenzhen’s Housing and Construction Bureau found 31 companies violated industry rules and ordered eight of them to suspend business for one year in the city for using substandard sea sand to make concrete.

Like many Chinese cities, Shenzhen is undergoing a frenzy of construction activity, with architects including OMA and Mecanoo working in the city.

OMA recently won a competition to design a financial office tower, the firm’s second building in the city after the Shenzhen Stock Exchange. Mecanoo are woking on a cultural complex in the Longgang district, while the Futian District – an area that’s larger than Manhattan – is being redesigned by SWA Group to create pedestrian areas and green spaces.Source: Arch Daily – “Construction of China’s Tallest Building On Hold Due to Concrete Scandal”

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