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Low carbon bricks developed using construction and demolition waste

  • Integrity Education, Delhi
  • 17, Sep 2021
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  • Researchers have developed a technology to produce energy-efficient walling materials using construction and demolition (C&D) waste and alkali-activated binders. 
  • These are called low-C bricks, do not require high-temperature firing, and avoid the use of high-energy materials such as Portland cement.
  • This technology will also mitigate the disposal problems associated with the C&D wastes.
  • Conventionally, building envelopes consist of masonry walls built with burnt clay bricks, concrete blocks, hollow clay blocks, fly ash bricks, lightweight blocks, and so on.
  • The envelopes spend energy during their production, thus incurring carbon emission consume mined raw material resources which lead to unsustainable constructions.
  • The construction industry generates vast amounts (70 – 100 million tonnes per annum) of construction and demolition waste (CDW).