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
| Jul 20, 2012
Office Report: Fitouts, renovations keep sector moving
BD+C's Giants 300 Top 25 AEC Firms in the Office sector.
| Jul 20, 2012
K-12 Schools Report: ‘A lot of pent-up need,’ with optimism for ’13
The Giants 300 Top 25 AEC Firms in the K-12 Schools Sector.
| Jul 20, 2012
Higher education market holding steady
But Giants 300 University AEC Firms aren’t expecting a flood of new work.
| Jul 20, 2012
3 important trends in hospital design that Healthcare Giants are watching closely
BD+C’s Giants 300 reveals top AEC firms in the healthcare sector.
| Jul 20, 2012
Global boom for hotels; for retail, not so much
The Giants 300 Top 10 Firms in the Hospitality and Retail sectors.
| Jul 20, 2012
Gensler, Stantec, Turner lead ‘green’ firms
The Top 10 AEC Firms in Green Buildings and LEED Accredited Staff.
| Jul 19, 2012
Renovation resurgence cuts across sectors
Giants 300 reconstruction sector firms ‘pumping fresh blood in tired spaces.’
| Jul 19, 2012
Rental market pushing service, ‘community’
The Top 25 Giants 300 AEC firms in the Multifamily Sector keep four-legged tenants in mind.
| Jul 19, 2012
AEC firms ready to dive into public projects
But the size of the pool keeps shrinking for the Top 25 AEC firms in the Government Sector.