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
Architects | Sep 6, 2018
Little details, big questions: Occupancy planning 101 for healthcare facilities
Transitioning into a new hospital is no easy feat and daily tasks can have a huge impact.
Architects | Aug 14, 2018
AIA takes a firmer stand on making schools safer with better design
The Institute urges the formation of a federal clearinghouse for best practices, and wants security-related design to be eligible for grants.
Architects | Aug 9, 2018
The convergence of product design and architecture
Great design is born out of simplicity, purity, timelessness, unobtrusiveness and intuitiveness.
Architects | Aug 1, 2018
Client experience as competitive advantage for AEC firms
Clients are looking for solutions to their business problems from collaborative advisors. They’ve come to expect a higher level of service and detail than what was provided in the past.
AEC Tech | Jul 24, 2018
Weidt Group’s Net Energy Optimizer now available as software as a service
The proprietary energy analysis tool is open for use by the public.
Building Owners | Jul 17, 2018
Are we facing a new era in Foreign Direct Investment?
The construction industry is already feeling the effects of the recent tariffs, not only with higher steel and aluminum prices, but with higher prices on Canadian lumber.
Codes and Standards | Jul 17, 2018
NIMBYism, generational divide threaten plan for net-zero village in St. Paul, Minn.
The ambitious redevelopment proposal for a former Ford automotive plant creates tension.
Office Buildings | Jul 17, 2018
Transwestern report: Office buildings near transit earn 65% higher lease rates
Analysis of 15 major metros shows the average rent in central business districts was $43.48/sf for transit-accessible buildings versus $26.01/sf for car-dependent buildings.
Architects | Jul 10, 2018
AEC marketing fundamentals can still have a role in winning new business
In our Internet-fueled world, it’s easy to get distracted by the latest online tools. But the boring stuff is still important, and you don’t want to lose sight of old-school techniques that are just as persuasive now as they were a few decades ago.