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
| Aug 9, 2022
Work-from-home trend could result in $500 billion of lost value in office real estate
Researchers find major changes in lease revenues, office occupancy, lease renewal rates.
| Aug 9, 2022
5 Lean principles of design-build
Simply put, lean is the practice of creating more value with fewer resources.
| Aug 9, 2022
Designing healthy learning environments
Studies confirm healthy environments can improve learning outcomes and student success.
Legislation | Aug 8, 2022
Inflation Reduction Act includes over $5 billion for low carbon procurement
The Inflation Reduction Act of 2022, recently passed by the U.S. Senate, sets aside over $5 billion for low carbon procurement in the built environment.
| Aug 8, 2022
Mass timber and net zero design for higher education and lab buildings
When sourced from sustainably managed forests, the use of wood as a replacement for concrete and steel on larger scale construction projects has myriad economic and environmental benefits that have been thoroughly outlined in everything from academic journals to the pages of Newsweek.
AEC Tech | Aug 8, 2022
The technology balancing act
As our world reopens from COVID isolation, we are entering back into undefined territory – a form of hybrid existence.
Legislation | Aug 5, 2022
D.C. City Council moves to require net-zero construction by 2026
The Washington, D.C. City Council unanimously passed legislation that would require all new buildings and substantial renovations in D.C. to be net-zero construction by 2026.
Cultural Facilities | Aug 5, 2022
A time and a place: Telling American stories through architecture
As the United States enters the year 2026, it will commence celebrating a cycle of Sestercentennials, or 250th anniversaries, of historic and cultural events across the land.
Sponsored | | Aug 4, 2022
Brighter vistas: Next-gen tools drive sustainability toward net zero line
New technologies, innovations, and tools are opening doors for building teams interested in better and more socially responsible design.
| Aug 4, 2022
Newer materials for green, resilient building complicate insurance underwriting
Insurers can’t look to years of testing on emerging technology to assess risk.
