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
| Jun 17, 2014
World's tallest pair of towers to serve as 'environmental catalyst' for China
The Phoenix Towers are expected to reach 1 km, the same height as Adrian Smith and Gordon Gill's Kingdom Tower, but would set a record for multiple towers in one development.
| Jun 16, 2014
6 U.S. cities at the forefront of innovation districts
A new Brookings Institution study records the emergence of “competitive places that are also cool spaces.”
| Jun 13, 2014
Gilbane Building Company names new president and chief operating officer
Gilbane Building company hires new president and COO
| Jun 13, 2014
First look: BIG's spiraling museum for watchmaker Audemars Piguet
The glass-and-steel pavilion's spiral structure acts as a storytelling device for the company's history.
| Jun 13, 2014
Grocery stores, restaurants make neighborhoods most desirable [infographic]
John Burns Real Estate Consulting ranks the top 25 housing amenities by generation, based on feedback from more than 20,000 home shoppers.
| Jun 12, 2014
Zaha Hadid's 'gravity defying' Issam Fares Institute opens in Beirut
The design builds upon the institute’s mission as a catalyst and connector between AUB, researchers and the global community.
| Jun 12, 2014
Tod Williams Billie Tsien Architects' design selected for new UCSC facility
The planned site is a natural landscape among redwood trees with views over Monterey Bay, a site that the architects have called “one of the most beautiful they have ever worked on.”
| Jun 12, 2014
Austrian university develops 'inflatable' concrete dome method
Constructing a concrete dome is a costly process, but this may change soon. A team from the Vienna University of Technology has developed a method that allows concrete domes to form with the use of air and steel cables instead of expensive, timber supporting structures.
| Jun 11, 2014
David Adjaye’s housing project in Sugar Hill nears completion
A new development in New York's historic Sugar Hill district nears completion, designed to be an icon for the neighborhood's rich history.
| Jun 11, 2014
Bill signing signals approval to revitalize New Orleans’ convention center corridor
A plan to revitalize New Orleans' Convention Center moves forward after Louisiana governor signs bill.
