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
| Dec 9, 2011
BEST AEC FIRM 2011: Chapman Construction/Design
Taking sustainable practices to heart.
| Dec 9, 2011
BEST AEC FIRMS 2011: EYP Architecture & Engineering
Expertise-Driven Design: At EYP Architecture & Engineering, growing the business goes hand in hand with growing the firm’s people.
| Dec 8, 2011
Keast & Hood Co. part of Statue of Liberty renovation team
Keast & Hood Co., is the structural engineer-of-record for the year-long $27.25 million renovation of the Statue of Liberty.
| Dec 8, 2011
HDR opens office in Shanghai
The office, located in the Chong Hing Finance Center in Shanghai’s busy Huangpu District, will support HDR’s design efforts throughout Asia.
| Dec 8, 2011
HOK elevates the green office standard
Firm achieves LEED Platinum certification in New York office that overlooks Bryant Park.
| Dec 7, 2011
ACE Mentor Program receives Presidential Award for Excellence in Science, Math and Engineering Mentoring
Thornton Tomasetti founding principal Charles H. Thornton responsible for launching ACE.
| Dec 7, 2011
NSF International qualifies first wallcoverings distributor to the New American National Standard for Sustainable Wallcoverings
TRI-KES demonstrates leadership in environmental stewardship as the first distributor to earn qualification.
