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 16, 2013
Construction spending hits four-year high in July: AGC report
Total construction spending hit a four-year high in July as private residential and nonresidential activity increased while public spending declined, according to an analysis of new Census Bureau data by the Associated General Contractors of America. Association officials urged lawmakers in Washington to make infrastructure investment a top federal priority before funding runs out at the end of September.
| Sep 13, 2013
Loews Hotels & Resorts announces major cross-portfolio upgrades
Loews Hotels & Resorts is currently in the midst of a major growth and property redesign initiative, reflecting a strong national trend in hospitality renovation.
| Sep 13, 2013
Video: Arup offers tour of world's first algae-powered building
Dubbed BIQ house, the building features a bright green façade consisting of hollow glass panels filled with algae and water.
| Sep 11, 2013
Inaugural BUILDINGChicago/Greening the Heartland Expo & Conference draws attendees from 27 states
More than 500 attendees from 27 states attended the inaugural BUILDINGChicago/Greening the Heartland Conference, held September 9-11, at the Holiday Inn Chicago Mart Plaza.
| Sep 10, 2013
The new medical office building: 7 things to know about today’s outpatient clinic
Regulatory pressures, economic constraints, and emerging technologies are transforming healthcare. Learn how Building Teams are responding with efficient, appealing, boundary-blurring outpatient buildings.
| Sep 6, 2013
Public Architecture's Day Labor Station: Just the type of 'great idea' we're looking for in the $5,000 Vision U40 competition
Thinking about competing in BD+C's Vision U40 program at next month's U40 Leadership Summit? Here's a good example of the kind of "great idea" we're looking for.
| Sep 6, 2013
U40 Summit featured speaker: Arthur Gensler on how to build a world-class AEC practice
Gensler, founder of the world’s largest architecture firm, will talk about the role of the architect in society, the impact of great design, and the practicalities of starting and running a practice, and will offer advice for today’s young design and construction professionals.
| Sep 4, 2013
Augmented reality: 12 applications for design and construction professionals
Building Design+Construction reached out to AEC professionals who have studied and applied augmented reality and asked them to pinpoint applications that are ripe for the technology. Here’s what they had to offer.
| Sep 4, 2013
Augmented reality goes mainstream: 12 applications for design and construction firms
Thanks to inexpensive mobile devices and increasingly advanced software apps, Building Teams are finally able to bring their BIM models to life on the job site.
| Sep 4, 2013
K-12 school design that pays off for students
More and more educators are being influenced by the Reggio Emilia approach to pedagogy, with its mantra of “environment as the third teacher”—an approach that gives Building Teams a responsibility to pay even closer attention to the special needs of today’s schools.
