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
| Oct 4, 2011
GREENBUILD 2011: Methods, impacts, and opportunities in the concrete building life cycle
Researchers at the Massachusetts Institute of Technology’s (MIT) Concrete Sustainability Hub conducted a life-cycle assessment (LCA) study to evaluate and improve the environmental impact and study how the “dual use” aspect of concrete.
| Oct 4, 2011
GREENBUILD 2011: Johnsonite features sustainable products
Products include rubber flooring tiles, treads, wall bases, and more.
| Oct 4, 2011
GREENBUILD 2011: Nearly seamless highly insulated glass curtain-wall system introduced
Low insulation value reflects value of entire curtain-wall system.
| Oct 4, 2011
GREENBUILD 2011: Ready-to-use wood primer unveiled
Maintains strong UV protection, clarity even with application of lighter, natural wood tones.
| Oct 4, 2011
GREENBUILD 2011: Two new recycled glass products announced
The two collections offer both larger and smaller particulates.
| Oct 4, 2011
GREENBUILD 2011: Mythic Paint launches two new paint products
A high performance paint, and a combination paint and primer now available.
| Oct 4, 2011
GREENBUILD 2011: Wall protection line now eligible to contribute to LEED Pilot Credit 43
The Cradle-to-Cradle Certified Wall Protection Line offers an additional option for customers to achieve LEED project certification.
| Oct 3, 2011
Magellan Development Group opens Village Market in Chicago’s Lakeshore East neighborhood
Magellan Development Group and Hanwha Engineering & Construction are joint-venture development partners on the project. The Village Market was designed for Silver LEED certification by Loewenberg Architects and built by McHugh Construction.
| Oct 3, 2011
Balance bunker and Phase III projects breaks ground at Mitsubishi Plant in Georgia
The facility, a modification of similar facilities used by Mitsubishi Heavy Industries, Inc. (MHI) in Japan, was designed by a joint design team of engineers and architects from The Austin Company of Cleveland, Ohio, MPSA and MHI.
| Oct 3, 2011
Cauceglia to lead Allsteel’s global accounts
Cauceglia is responsible for developing new global business strategies and expanding existing business within the Fortune 500 sector.
