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
| Nov 3, 2014
IIT names winners of inaugural Mies Crown Hall Americas Prize
Herzog & de Meuron's iconic 1111 Lincoln Road parking garage in Miami Beach, Fla., is one of two winners of the $50,000 architectural prize.
| Nov 3, 2014
Cairo's ultra-green mixed-use development will be topped with flowing solar canopy
The solar canopy will shade green rooftop terraces and sky villas atop the nine-story structure.
| Nov 2, 2014
Top 10 LEED lessons learned from a green building veteran
M+W Group's David Gibney offers his top lessons learned from coordinating dozens of large LEED projects during the past 13 years.
| Oct 31, 2014
Dubai plans world’s next tallest towers
Emaar Properties has unveiled plans for a new project containing two towers that will top the charts in height, making them the world’s tallest towers once completed.
| Oct 30, 2014
CannonDesign releases guide for specifying flooring in healthcare settings
The new report, "Flooring Applications in Healthcare Settings," compares and contrasts different flooring types in the context of parameters such as health and safety impact, design and operational issues, environmental considerations, economics, and product options.
| Oct 30, 2014
Perkins Eastman and Lee, Burkhart, Liu to merge practices
The merger will significantly build upon the established practices—particularly healthcare—of both firms and diversify their combined expertise, particularly on the West Coast.
| Oct 29, 2014
Better guidance for appraising green buildings is steadily emerging
The Appraisal Foundation is striving to improve appraisers’ understanding of green valuation.
| Oct 29, 2014
Increasing number of design projects meeting carbon reduction targets, says AIA report
Of the 2,464 projects accounted for in AIA's 2030 Commitment 2013 Progress Report, 401 are meeting the 60% carbon reduction target—a 200% increase from 2012.
Sponsored | | Oct 29, 2014
What’s the difference between your building’s coating chalking and fading?
While the reasons for chalk and fade are different, both occurrences are something to watch for. SPONSORED CONTENT
Sponsored | | Oct 29, 2014
Historic Washington elementary school incorporates modular design
More and more architects and designers are leveraging modern modular building techniques for expansion projects planned on historical sites. SPONSORED CONTENT
