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News Hong Kong study reveals blended cement reduces carbon footprint

Hong Kong study reveals blended cement reduces carbon footprint

Written by Global Cement staff 08 April 2024
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China: A new study from Hong Kong Polytechnic University showcases sustainable cement production methods, focusing on low-clinker cements and alternative solutions for incinerator fly ash (IFA). The research demonstrates that using carbonated-washed IFA mixed with slag, coal fly ash, or metakaolin can replace 60% of Portland cement, forming ternary blended cement. This approach reportedly reduces the carbon footprint of cement production.

The study found that slag was the most effective, improving pore structure and increasing ettringite and hemicarboaluminate formation with a blend of 40% slag and 20% IFA. It achieved 90% of the compressive strength of pure Portland cement after 90 days.

The researchers said "This study demonstrated the promising potential of the blended cements to simultaneously divert IFA from landfills and reduce the clinker content of cement."

Last modified on 10 April 2024
Published in Global Cement News
Tagged under
  • Hong Kong
  • China
  • Study
  • Research
  • blended cement
  • decarbonisation
  • Sustainability
  • Clinker factor
  • incinerator fly ash
  • Slag
  • Ternary Cement
  • GCW654
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