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 | May 31, 2016
JLG Architects acquires Minneapolis-based Studio Five Architects
Led by Linda McCracken-Hunt, SFA is one of Minnesota’s oldest woman-owned architecture firms.
Building Team Awards | May 31, 2016
Gonzaga's new student center is a bustling social hub
Retail mall features, comfortable furniture, and floor-to-ceiling glass add vibrancy to the new John J. Hemmingson Center.
Building Team Awards | May 27, 2016
Big police academy trains thousands of New York's finest
The Police Training Academy in Queens, N.Y., consists of a 480,000-sf academic/administration building and a 240,000-sf physical training facility, linked by an aerial pedestrian bridge.
Building Team Awards | May 26, 2016
Cimpress office complex built during historically brutal Massachusetts winter
Lean construction techniques were used to build 275 Wyman Street during a winter that brought more than 100 inches of snow to suburban Boston.
Building Team Awards | May 25, 2016
New health center campus provides affordable care for thousands of Northern Californians
The 38,000-sf, two-level John & Susan Sobrato Campus in Palo Alto is expected to serve 25,000 patients a year by the end of the decade.
Architects | May 24, 2016
Lissoni Architettura’s NYC Aquatrium takes first place in New York City Waterfront Design competition
NYC Aquatrium was selected from among 178 proposals from 40 countries as the winner of Arch Out Loud’s NYC Aquarium & Public Waterfront design competition
Building Team Awards | May 24, 2016
Los Angeles bus depot squeezes the most from a tight site
The Building Team for the MTA Division 13 Bus Operations and Maintenance Facility fit 12 acres’ worth of programming in a multi-level structure on a 4.8-acre site.
Building Team Awards | May 23, 2016
'Greenest ballpark' proves a winner for St. Paul Saints
Solar arrays, a public art courtyard, and a picnic-friendly “park within a park" make the 7,210-seat CHS Field the first ballpark to meet Minnesota sustainable building standards.
Architects | May 20, 2016
NCARB survey indicates continued growth of U.S. architects
The number of U.S. architects surpassed 110,000 in 2015, a 2% increase from the previous year.
Multifamily Housing | May 19, 2016
Architect Jean Nouvel designs flood-resilient Monad Terrace in Miami Beach
A man-made lagoon with lush vegetation at the base of the complex is expected to adapt to climate change and rising sea levels.