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
Codes and Standards | Feb 12, 2015
New Appraisal Institute form aids in analysis of green commercial building features
The Institute’s Commercial Green and Energy Efficient Addendum offers a communication tool that lenders can use as part of the scope of work.
Office Buildings | Feb 12, 2015
Is Houston headed for an office glut?
More than 13 million sf could be completed this year, adding to this metro’s double-digit vacancy woes.
Modular Building | Feb 12, 2015
New shipping container complex begins construction in Albuquerque
The Green Jeans Farmery already has a hydroponic farm component courtesy of owner and entrepreneur Roy Solomon.
Transit Facilities | Feb 12, 2015
Gensler proposes network of cycle highways in London’s unused underground
Unused tube lines would host pedestrian paths, cycle routes, cultural spaces, and retail outlets.
Healthcare Facilities | Feb 11, 2015
Primer: Using 'parallel estimating' to pinpoint costs on healthcare construction projects
As pressure increases to understand capital cost prior to the first spade touching dirt, more healthcare owners are turning to advanced estimating processes, like parallel estimating, to improve understanding of exposure, writes CBRE Healthcare's Andrew Sumner.
Transportation & Parking Facilities | Feb 11, 2015
11 of the nation’s best ‘Complete Streets’ policies of 2014
Austin, Texas, and Troy, N.Y., are among the cities with the strongest safe streets policies, according to a new report.
Sponsored | Roofing | Feb 11, 2015
New school blends with local architecture using Petersen metal roof
Perkins Eastman in Stamford, Conn., designed the school to emphasize and integrate the International Baccalaureate curriculum throughout.
Mixed-Use | Feb 11, 2015
Developer plans to turn Eero Saarinen's Bell Labs HQ into New Urbanist town center
Designed by Eero Saarinen in the late 1950s, the two-million-sf, steel-and-glass building was one of the best-funded and successful corporate research laboratories in the world.
Architects | Feb 11, 2015
Shortlist for 2015 Mies van der Rohe Award announced
Copenhagen, Berlin, and Rotterdam are the cities where most of the shortlisted works have been built.
BIM and Information Technology | Feb 10, 2015
Google's 3D scanning camera leaves the lab
Google is said to be partnering with LG to create a version of the technology for public release sometime this year.