Impact of specifying concrete at 56 or 90 days instead of 28 days? Looking for case studies or papers quantifying GWP reductions

Materials
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Hi CLF community.

I understand how extending the date of acceptance of concrete strength can help reduce the GWP of concrete mixes. But I would like to be able to refer to a paper or a case study that quantified the actual impact in terms of GWP.

This article hints at an average reduction of 10 kgCO2/m3. But obviously it depends on the type of mix and application where it was used. Can anyone point me to anything more specific?

Thanks
Lucile

2

Hey Lucile,
As you already pointed out, the most accurate way of approaching this is comparing the carbon footprint of the concrete mix with the 56/60-day strength requirement to that achieving the original 28-day strength.