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
Higher Education | Feb 3, 2015
Integrated Learning Neighborhoods: A solution for linking student housing with the typical student experience
Just as urban housing fits into the city as a whole, student housing can be integrated into the campus network as a series of living/learning neighborhoods, write Gensler's Brian Watson and Mark McMinn.
Office Buildings | Feb 3, 2015
5 trends transforming workplace design
RTKL's workplace design expert Jodi Williams foresees healthier and more technologically enabled offices that allow productive worker interaction, wherever they happen to be.
Architects | Feb 3, 2015
Frank Lloyd Wright’s work nominated for UNESCO World Heritage Status
If selected, Wright’s work will be the first examples of U.S. modern architecture on the list.
Contractors | Feb 3, 2015
Nonresidential construction spending expands in December 2014
Seven of 16 nonresidential construction subsectors posted increases in spending in December on a monthly basis.
Office Buildings | Feb 3, 2015
Bjarke Ingels' BIG proposes canopied, vertical village for Middle East media company
The tensile canopy shades a relaxation plaza from the desert sun.
Fire-Rated Products | Feb 3, 2015
AIA course: Fire and life safety in large buildings
Earn 1.0 AIA/CES learning units by studying this article and successfully completing the online exam.
Multifamily Housing | Feb 2, 2015
D.C. developer sees apartment project as catalyst for modeling neighborhood after N.Y.'s popular High Line district
It’s no accident that the word “Highline” is in this project’s name. The goal is for the building to be a kind of gateway into the larger redevelopment of the surrounding neighborhood to resemble New York’s City’s trendy downtown Meatpacking District, through which runs a portion the High Line elevated park.
Healthcare Facilities | Feb 1, 2015
7 new factors shaping hospital emergency departments
A new generation of highly efficient emergency care facilities is upping the ante on patient care and convenience while helping to reposition hospital systems within their local markets.
Multifamily Housing | Jan 31, 2015
5 intriguing trends to track in the multifamily housing game
Demand for rental apartments and condos hasn’t been this strong in years, and our experts think the multifamily sector still has legs. But you have to know what developers, tenants, and buyers are looking for to have any hope of succeeding in this fast-changing market sector.
Multifamily Housing | Jan 31, 2015
20% down?!! Survey exposes how thin renters’ wallets are
A survey of more than 25,000 adults found the renters to be more burdened by debt than homeowners and severely short of emergency savings.