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Toby Lewis

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  • Comment on: Architects needn’t take a guilt-trip on concrete

    Toby Lewis's comment 27 January, 2019 4:03 pm

    Not all concrete is created equal. Cement is main the bearer of the embodied carbon. It is quite possible to make concrete with anything from 50% to 80% of the cement replaced with something with a much lower embodied carbon: GGBFS, PFA or fine limestone powder for example. Architects should familairise themselves with the technical requirements of low carbon concrete and specify it whenever it can be used.