Production of wet-cast slag-based concrete products

A method of producing a wet-cast slag-based concrete product comprising steps of:

• providing a slag-based binder, an aggregate and water;
• mixing the slag-based binder, the aggregate and the water to produce a non-zero-slump concrete composition comprising a first water to slag-based binder ratio by weight of greater than 0.2;
• casting the non-zero-slump concrete composition by transferring the non-zero-slump concrete composition into a mould;
• setting the non-zero-slump concrete composition within the mould and reducing a water content of the non-zero-slump concrete composition while the non-zero-slump concrete composition is within the mould to produce a slag-based intermediate comprising a second water to slag-based binder ratio by weight that is less than the first water to slag-based binder ratio by weight;
• demoulding the slag-based intermediate to produce a demoulded intermediate;
• pre-conditioning the demoulded intermediate to produce a demoulded pre-conditioned slag-based intermediate comprising a third water to slag-based binder ratio by weight that is less than the first water to slag-based binder ratio by weight and that is also less than the second water to slag-based binder ratio by weight;
• and
• curing the demoulded pre-conditioned slag-based intermediate with carbon dioxide to produce the wet-cast slag-based concrete product, including introducing the carbon dioxide after the mixing, the reducing of the water content, the demoulding, and the pre-conditioning.