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 24, 2014
White Paper: Using social media to build your business
This white paper from Benjamin Moore provides practical guidance for building and sustaining an effective online presence, with the ultimate goal of helping your painting business become more successful.
| Feb 24, 2014
First look: UC San Diego opens net-zero biological research lab
The facility is intended to be "the most sustainable laboratory in the world," and incorporates natural ventilation, passive cooling, high-efficiency plumbing, and sustainably harvested wood.
| Feb 24, 2014
White Paper: The science of color and light
This white paper from Benjamin Moore provides an overview of the properties of color and light, along with practical guidance on how the relationship between the two affects design choices.
| Feb 21, 2014
Naturally ventilated hospital planned in Singapore
The Ng Teng Fong General Hospital will take advantage of the region's prevailing breezes to cool the spaces.
| Feb 21, 2014
Calatrava ordered to pay millions for 'shortcomings in his work' on conference center project
Famed architect Santiago Calatrava must pay 2.9 million euros due to faulty design work on the Palacio de Congresos project in Oviedo, Spain.
| Feb 21, 2014
First look: Goettsch Partners reveals 'lighthouse' tower scheme for China resort
Topped with glowing beacon that will be visible for miles in any direction, the Rosewood Sanya tower is the centerpiece of a new resort and meeting complex on China’s Hainan Island.
| Feb 20, 2014
5 myths about cross laminated timber
A CLT expert clears up several common misconceptions and myths surrounding the use of wood as a building material.
Sponsored | | Feb 20, 2014
Chicago’s historic Wrigley Building renovated to attract tech companies
Purchased in 2011 by a consortium of investors led by BDT Capital Partners, the building’s new owners have recently renovated and reimagined the next life for this architectural landmark—as a hub for tech firms.
| Feb 20, 2014
World's longest desk? Massive, undulating desk accommodates 145 office workers [video]
The desk is built from plywood and one continuous sheet of resin, and can serve all 145 office employees at once.
| Feb 19, 2014
It's a world record! Largest uninterrupted concrete pour kicks off Wilshire Grand project
Guinness World Records verifies the concrete pour as the largest ever