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
| Jan 30, 2013
Design Firm Little Expands Durham Interiors Studio
Both Benner and Byers have expertise in market sectors such as corporate, retail, hospitality, healthcare, research /technology, critical facilities, civic and education.
| Jan 22, 2013
Midwestern Construction Company Acquires Local Architecture Firm
St. Charles, Ill.-based design/build and construction firm acquires architecture firm.
| Jan 17, 2013
Thornton Tomasetti Founding Principal Thornton receives ASCE Lifetime Achievement Award
The OPAL Lifetime Achievement Award is given to civil engineers who “represent a model of achievement to which future generations of engineers aspire to match or exceed.”
| Jan 16, 2013
2013 40 Under 40 application process now open
Building Design+Construction's 40 Under 40 is open to AEC professionals from around the globe.
| Jan 16, 2013
SOM’s innovative Zhengzhou Greenland Plaza opens
The 2.59-million-square-feet building houses a mixed-use program of offices on its lower floors and a 416-room hotel.
| Jan 15, 2013
Morris Architects joins Huitt-Zollars
Morris, which will continue to provide services under its current name and leadership, is entering its 75th year of continuous practice as an architectural, interior design, landscape architecture, and planning firm.
| Jan 11, 2013
HMC Architects: In their own voices
See what HMC professionals say about their “Best AEC Firm to Work For”
| Jan 10, 2013
Guide predicts strongest, weakest AEC markets for 2013
2013 Guide to U.S. AEC markets touts apartments, natural gas, senior housing and transmission and distribution.