Volcanic ash may help reduce energy required to build cities Credit: MIT News
Volcanic ash reduces the energy required to manufacture concrete

Scientists have discovered that adding volcanic rock dust to concrete may be an effective additive, leading to a decrease in energy consumption. According to the study, it takes 16 percent less energy to construct 26 concrete buildings made with 50 percent volcanic ash, compared to traditional concrete. This makes possible the construction of sustainable cities with low environmental impact. Currently the manufacturing of traditional Portland cement is responsible for about 5 percent of the world’s carbon dioxide emissions. This raises the possibility that the cities of the future will be made of volcanic ash to reduce the environmental footprint.

Read the full story: MIT News
Scientific publication: Journal of Cleaner Production