State inspectors in Shenzhen, China, have found at least 15 local plants producing concrete with unprocessed sea sand. Thirty-one companies have been cited for violations, and eight were ordered to suspend business for a year. Construction on multiple projects in Guangdong Province—including the 660-m Ping'an Finance Center—has been halted during the inspection. (Only 80 meters of the Ping'an building has been erected so far; China Construction First Building Group Corp. Ltd. is the primary contractor.)
Unprocessed sea sand is illegal to use as an aggregate in concrete because its chlorine and salt content are corrosive to steel, causing buildings to degrade and potentially collapse within a few decades. River sand, the preferred material, costs twice as much and is in short supply.
The scandal is currently confined to Shenzhen but could spread to other cities given the obvious financial incentives for using sea sand. Inspectors also found that two large sand pits were using seawater instead of fresh water to rinse sand, also a problematic practice.
Industry experts express particular concern because China currently has nine of the putative 20 tallest buildings in the world currently under construction, as well as many other skyscrapers.
(http://www.scmp.com/news/china/article/1191896/shenzhen-construction-hold-after-alert-over-cheap-sand-concrete)
Related Stories
University Buildings | Oct 16, 2015
5 ways architecture defines the university brand
People gravitate to brands for many reasons. Campus architecture and landscape are fundamental influences on the college brand, writes Perkins+Will's David Damon.
Architects | Oct 13, 2015
Architects Foundation expands National Resilience Initiative
The group is launching a search for three more NRI members.
Architects | Oct 13, 2015
Santiago Calatrava wins the European Prize for Architecture
The award honors those who "forward the principles of European humanism."
Office Buildings | Oct 5, 2015
Renderings revealed for Apple's second 'spaceship': a curvy, lush office complex in Sunnyvale
The project has been dubbed as another “spaceship,” referencing the nickname for the loop-shaped Apple Campus under construction in Cupertino.
Airports | Oct 5, 2015
Perkins+Will selected to design Istanbul’s 'Airport City'
The mixed-use development will be adjacent to the Istanbul New Airport, which is currently under construction.
High-rise Construction | Oct 5, 2015
Zaha Hadid designs cylindrical office building with world’s tallest atrium
The 200-meter-high open space will cut the building in two.
Architects | Oct 2, 2015
Herzog & de Meuron unveils design for Vancouver Art Gallery expansion
The blocky, seven-story wood and concrete structure is wider in the middle and uppermost floors.
Airports | Sep 30, 2015
Takeoff! 5 ways high-flyin' airports are designing for rapid growth
Nimble designs, and technology that humanizes the passenger experience, are letting airports concentrate on providing service and generating revenue.
Contractors | Sep 30, 2015
FMI: Construction in place on track for sustained growth through 2016
FMI’s latest report singles out manufacturing, lodging, and office sectors as the drivers of nonresidential building activity and investment.
![What went wrong? Diagnosing building envelope distress [AIA course]](/sites/default/files/styles/list_big/public/Screen%20shot%202015-09-29%20at%209.46.33%20AM.png?itok=QDq8CQJv "What went wrong? Diagnosing building envelope distress [AIA course]")
Reconstruction & Renovation | Sep 29, 2015
What went wrong? Diagnosing building envelope distress [AIA course]
With so many diverse components contributing to building envelope assemblies, it can be challenging to determine which of these myriad elements was the likely cause of a failure.
