Month: August 2009

READ: More on Concrete Talk from The Green Asia Group

Carolyn Kenwrick, The GreenAsia Group Roughly 5 to 10 percent of global CO2 emissions are related to the manufacture and transportation of cement, a major ingredient of concrete. The manufacture of cement is considered worldwide as one of the world’s most energy intensive industries, and as such, is an industry that is increasingly being looked at to become more sustainable. 0.8 tonnes of CO2 are emitted for every tonne of cement produced. 0.4 tonnes are offset when the cement is mixed with water and absorbed, but the carbon footprint for 1 tonne of cement remains at 0.4 tonnes once used in construction. “The manufacture of cement is relatively efficient when compared with other building materials, such as steel and wood. The problem is the scale at which it’s produced – roughly 2.4 billion tons in 2006 and growing.” Professor Franz-Josef Ulm Massachusetts Institute of Technology in Cambridge, Mass. “The reality is that the geological availability, and global distribution, of suitable natural resources, coupled with the extensive validation needed to confirm fitness-for-purpose, make it highly unlikely …