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
| Sep 22, 2014
USGBC names 2014 Best of Buildings Award winners
The Best of Building Awards celebrate the year’s best products, projects, organizations and individuals making an impact in green building.
| Sep 20, 2014
Healthcare conversion projects: 5 hard-earned lessons from our experts
Repurposing existing retail and office space is becoming an increasingly popular strategy for hospital systems to expand their reach from the mother ship. Our experts show how to avoid the common mistakes that can sabotage outpatient adaptive-reuse projects.
| Sep 19, 2014
Smithsonian Institution opens LEED Platinum lab facility
The Charles McC. Mathias Laboratory will emit 37% less CO2 than a comparable lab that does not meet LEED-certification standards.
| Sep 19, 2014
8 hot healthcare projects win interior design awards
Winners of IIDA's 2014 Healthcare Interior Design Competition include Perkins+Will, AECOM, Buffalo Design, and SmithGroupJJR, for projects from Cincinnati to Toronto.
| Sep 18, 2014
Final designs unveiled for DC's first elevated park
OMA, Höweler + Yoon, NEXT Architects, and Cooper, Robertson & Partners have just released their preliminary design proposals for what will be known as the 11th Street Bridge Park.
| Sep 17, 2014
Arquitectonica's hairpin-shaped tower breaks ground in Miami
Rising above Biscayne Bay, the 305-meter tower will include three viewing decks, a restaurant, nightclub, and exhibition space.
| Sep 17, 2014
Atlanta Braves break ground on mixed-use ballpark development
SunTrust Park will be constructed by American Builders 2017, a joint venture between Brasfield & Gorrie, Mortenson Construction, Barton Malow Company, and New South Construction.
| Sep 17, 2014
The doctor is in: New consortium to fund research of design's influence on public health
The AIA Design & Health Research Consortium has organized its design and health initiative around six evidence-based approaches.
| Sep 17, 2014
New developments in data center design
From the dozen or so facilities housing Google’s 900,000 servers to the sprawling server farms of Facebook to Amazon’s seven sites scattered around the world, today’s data centers must accommodate massive power demand, high heat loads, strict maintenance protocols, and super-tight security. This AIA Discovery course is worth 1.0 AIA CES HSW learning units.
| Sep 17, 2014
New hub on campus: Where learning is headed and what it means for the college campus
It seems that the most recent buildings to pop up on college campuses are trying to do more than just support academics. They are acting as hubs for all sorts of on-campus activities, writes Gensler's David Broz.