Yet several studies have shown that small quantities of CO 2 later reabsorb into concrete, even decades after it is emplaced, when elements of the material combine with CO 2 to form calcite.. A ...

They convert the calcium lactate to calcite, an ingredient in limestone, thus sealing off the cracks. This innovation could solve a longstanding problem with concrete, the world’s most common ...

Calcite is a common mineral, a form of calcium carbonate, similar in basic chemical composition to chalk and gypsum and the basic material for cement. There are at least 800 different forms of ...