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
Healthcare Facilities | Oct 4, 2019
Heart failure clinics are keeping more patients out of emergency rooms
An example of this building trend recently opened at Beaumont Hospital near Ann Arbor, Mich.
Giants 400 | Oct 3, 2019
Top 30 Convention Center Sector Architecture Firms for 2019
LMN Architects, Gensler, Populous, Fentress Architects, and Moody Nolan top the rankings of the nation's largest convention center sector architecture and architecture engineering (AE) firms, as reported in Building Design+Construction's 2019 Giants 300 Report.
Giants 400 | Oct 3, 2019
Top 110 Cultural Sector Architecture Firms for 2019
Gensler, Populous, DLR Group, Stantec, and Perkins and Will top the rankings of the nation's largest cultural facility sector architecture and architecture engineering (AE) firms, as reported in Building Design+Construction's 2019 Giants 300 Report.
Giants 400 | Oct 3, 2019
2019 Cultural Facility Giants Report: New libraries are all about community
The future of libraries is less about being quiet and more about hands-on learning and face-to-face interactions. This and more cultural sector trends from BD+C's 2019 Giants 300 Report.
Architects | Oct 3, 2019
LEO A DALY wins Architect of the Capitol contract
The firm will help modernize some of the country’s most significant public buildings.
3D Printing | Sep 17, 2019
Additive manufacturing goes mainstream in the industrial sector
More manufacturers now include this production process in their factories.
Multifamily Housing | Sep 12, 2019
Meet the masters of offsite construction
Prescient combines 5D software, clever engineering, and advanced robotics to create prefabricated assemblies for apartment buildings and student housing.
Cultural Facilities | Sep 11, 2019
The Kennedy Center expands for the first time since its 1971 debut
The REACH, with three pavilions on a generous lawn, adds openness and light to this performance space.
Architects | Sep 11, 2019
Buoyed by construction activity, architect compensation continues to see healthy gains
The latest AIA report breaks down its survey data by 44 positions and 28 metros.
Multifamily Housing | Sep 10, 2019
Carbon-neutral apartment building sets the pace for scalable affordable housing
Project Open has no carbon footprint, but the six-story, solar-powered building is already leaving its imprint on Salt Lake City’s multifamily landscape.