Maybe we need to look back at Roman Concrete and modernise it for present day use.
Hello Gordon Forredter,
Yes, it is true and matter of time. In view of scarcity of proven cementitious materials; fly ash and granulated blast furnace slag in near future which could be around 16% of cement production in 2050, there is a need to explore other alternative materials, including off-specified product and less-investigated by-products, to avoid an increase in clinker to cement ratio and even to support its reduction. Limestone and calcined clay could be the potential cement constituents to the extent of 18% and 8% respectively by 2050 (2DS) against 2014 status, where major share goes to proven materials; granulated blast furnace slag (13%) and fly ash (6%). The global reserves of raw clays are considered effectively unlimited compared to global cement production volume, and cement based on ground limestone and calcined clay are considered to penetrate the market, reaching 27% of global cement production by 2050 [IEA-WBCSD, 2018]. A file namely "Supplementary Cementitious Materials- A Futuristic Approach" is attached herewith for kind reference.
Superb Thinking. Lime and burnt lime with volcanic ash - Whoopee. I used to sell silica fume in their infancy. Nobody was interested but we kept at it. I don't know what has happened to it in SA but now I am trying to get approval for 50mm thick concrete to patch potholes.
Thank you, everyone.
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