Energy-efficient Low-C bricks | IASbaba

Energy-efficient Low-C bricks

Part of: Prelims and GS-III- Sci and Tech

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.