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
| Feb 28, 2012
McCarthy completes second phase of San Diego’s Scripps Hospital
Representing the second phase of a four-phased, $41.3 million expansion and remodeling project, the new addition doubles the size of the existing emergency department and trauma center to encompass a combined 27,000 square feet of space.
| Feb 28, 2012
LUMEnergi names Weinbaum president and CEO
Weinbaum’s experience spans communications, nanotechnology, electronics components, consumer products, semiconductors, software, wireless and lighting.
| Feb 28, 2012
Griffin Electric completes Medical University of South Carolina project
The 210,000-sf complex is comprised of two buildings, and houses research, teaching and office areas, plus conference spaces for the University.
| Feb 27, 2012
Consigli complete first building for Bigelow Ocean Sciences Campus
Designed by WBRC Architects Engineers in association with Perkins + Will.
| Feb 27, 2012
Hollister completes fit-out of 41,500-sf office space in Princeton, N.J.
Intricate interior project involved construction of more than 80 offices.
| Feb 27, 2012
Research Institute at Texas Children’s Hospital building receives LEED Gold
Innovative and sustainable design reflects best environmental building practices.
| Feb 26, 2012
Milwaukee U-Haul facility receives LEED-CI Silver
The new elements of the facility now include: efficient lighting with day-lighting controls and occupancy sensors, a high-efficiency HVAC system used in conjunction with a newly constructed thermal envelope to help reduce energy consumption, and the installation of low-flow fixtures to reduce water consumption.
| Feb 26, 2012
Hollister Construction awarded 42,000-sf office fit-out in Holtsville, N.Y.
Space leased by U.S. General Service Administration.
| Feb 26, 2012
Alvarez-Glasman & Colvin’s Chen LEED certified
Chen works closely with property owners to ensure that their properties meet and exceed all industry standards, and also provide long-term energy savings.