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
| Dec 4, 2012
City of Gainesville to break ground on $33 million bus fleet maintenance and ops facility
The 140,000-sf facility will include dispatch, administrative and maintenance facilities.
| Nov 28, 2012
Project team to showcase design for first mixed-use retail center of its kind in Mexico City
Project reaching construction milestone, offering national model for urban development in Mexico.
| Nov 28, 2012
Cummins announces ratings classification for data center power systems
The Data Center Continuous ratings span the range of Cummins Power Generation’s high horsepower diesel generator sets, from 1 MW up to 2.5 MW, and will apply to both 50 Hz and 60 Hz configurations.
| Nov 28, 2012
Francis Cauffman appoints Stainbrook Director of Higher Education
Stainbrook has 16 years of experience as a strategic planner and urban designer working on complex projects on- and off-campus.
| Nov 27, 2012
SFIA releases technical guide for cold-formed steel framing products
The 114-page book covers both structural and non-structural applications, including section properties of SFIA member product profiles, and complete load and span tables for most applications.
| Nov 21, 2012
Architecture Billings Index positive for third straight month
All regions reporting positive business conditions
| Nov 20, 2012
PC Construction completes Juniper Hall at Champlain College
Juniper Hall is on track for LEED Gold certification from the U.S. Green Building Council.
| Nov 14, 2012
U.S. Green Building Council partners with Pearson
Partnership will help further USGBC’s mission by advancing green building education
| Nov 14, 2012
U.S. Green Building Council announces grant from Google to catalyze transformation of building materials industry and indoor health
Focus is on healthy building materials to promote indoor environmental quality and human health
| Nov 14, 2012
USGBC's Greenbuild International Conference and Expo kicks off in San Francisco
7,000 members of the green building industry convene for opening plenary headlined by "Morning Joe" co-hosts Mika Brzezinksi and Joe Scarborough