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
Building Team Awards | May 19, 2016
Chinatown library unites and serves two emerging Chicago neighborhoods
The 16,000-sf, pebble-shaped Chinatown Branch Library was built at the intersection of new and old Chinatown neighborhoods. The goal is for the building to unite the communities and serve as a catalyst for the developing area.
Building Team Awards | May 19, 2016
NYC subway station lights the way for 300,000 riders a day
Fulton Center, which handles 85% of the riders coming to Lower Manhattan, is like no other station in the city’s vast underground transit web—and that’s a good thing.
Market Data | May 17, 2016
Modest growth for AIA’s Architecture Billings Index in April
The American Institute of Architects reported the April ABI score was 50.6, down from the mark of 51.9 in the previous month. This score still reflects an increase in design services.
Architects | May 16, 2016
AIA and HOK partner to advance Design and Health Research Consortium
The groups' key priority is to identify and develop practice-focused opportunities for funded research, publications, and tools in the area of design and public health.
Senior Living Design | May 16, 2016
Perkins Eastman releases white paper on biophilic design in senior living
The paper highlights some of the firm's top projects that feature biophilic design, a sustainable architecture strategy that connects people with nature.
Architects | May 16, 2016
3 strategies to creating environments that promote workplace engagement
VOA's Pablo Quintana writes that the industry is looking for ways to increase engagement through a mix of spaces suited to employees' desire for both privacy and connection.
Architects | May 11, 2016
AIA to create a resilience curriculum for architects
The program will teach resilient design and decision-making on hazard mitigation, climate adaptation and community resilience.
Retail Centers | May 10, 2016
5 factors guiding restaurant design
Restaurants are more than just places to eat. They are comprising town centers and playing into the future of brick-and-mortar retail.
AEC Tech | May 9, 2016
Is the nation’s grand tech boom really an innovation funk?
Despite popular belief, the country is not in a great age of technological and digital innovation, at least when compared to the last great innovation era (1870-1970).
Sports and Recreational Facilities | May 6, 2016
NBA’s Atlanta Hawks to build new practice center with attached medical facilities
The team will have easy access to an MRI machine, 3D motion capture equipment, and in-ground hydrotherapy.