Context Researchers have developed a technology to produce energy-efficient walling materials using construction and demolition waste and alkali-activated binders.
Key takeaways
The researchers developed low embodied carbon bricks from construction and demolition waste through an alkali activation process using fly ash and ground slag.
Called Low-C bricks, they do not require high-temperature firing and avoid the use of high-energy material such as Portland cement.
The technology will also solve the disposal problems associated with construction and demolition waste mitigation.
What is fly ash?
Fly ash is a fine powder that is a byproduct of burning pulverized coal in electric generation power plants.
When mixed with lime and water, fly ash forms a compound similar to Portland cement.
It is used in concrete and cement products, road base, metal recovery, and mineral filler among others.
Fly ash particles are toxic air pollutants. They can trigger heart disease, cancer, respiratory diseases and stroke.
