Influenza delle soluzioni di cloruro di sodio e di cloruro di magnesio sulla durabilita delle malte contenenti carbonato di calcio : Influence of magnesium and sodium chloride solutions on durability of mortar containing calcium carbonate

High calcium limestone is used in large amounts in concrete technology. It is an essential ingredient in the manufacture of cement clinker. It is also used as a coarse or fine aggregate in concrete. Attempts have also been made to partially or wholly replace gypsum with calcium carbonate in cements. Finely ground calcium carbonate may be added in small amounts to Portland cement. The Canadian Standard CSA CAN3-A.5. M83, for example, a/lows addition of up to 5% calcium carbonate in Type 10 normal Portland cement and Type 30 high early strength Portland cement.On utilise en grandes quantit\ue9s dans la technologie des b\ue9tons des calcaires \ue0 haute teneur en calcium. C?est un ingr\ue9dient essentiel dans la fabrication du clinker (ciment non broy\ue9). On l?emploie \ue9galement dans la fabrication du b\ue9ton comme granulat grossier ou fin. On a de plus tent\ue9 de remplacer int\ue9gralement ou partiellement le gypse par du carbonate de calcium dans les ciments. Le carbonate de calcium broy\ue9 fin peut \ueatre ajout\ue9 en petites quantit\ue9s au ciment portland. La norme canadienne CSA CAN3-A5-M83, par exemple, permet l?ajout de jusqu?\ue0 5 % de carbonate de calcium dans le ciment portland ordinaire de type 10 et le ciment portland \ue0 haute r\ue9sistance initiale de type 30.Peer reviewed: YesNRC publication: Ye