US 12,384,724 B2
Carbonation curing method to produce wet-cast slag-based concrete products
Mehrdad Mahoutian, Montreal (CA)
Assigned to CARBICRETE INC., Montreal (CA)
Filed by CARBICRETE INC., Montreal (CA)
Filed on Apr. 13, 2022, as Appl. No. 17/719,498.
Application 17/719,498 is a continuation of application No. 17/202,444, filed on Mar. 16, 2021, granted, now 11,358,903.
Application 17/202,444 is a continuation of application No. PCT/CA2020/050467, filed on Apr. 9, 2020.
Claims priority of provisional application 62/832,966, filed on Apr. 12, 2019.
Prior Publication US 2022/0234956 A1, Jul. 28, 2022
Int. Cl. C04B 28/08 (2006.01); B28B 1/14 (2006.01); B28B 7/42 (2006.01); B28B 11/24 (2006.01); B28B 13/06 (2006.01); C04B 40/02 (2006.01)
CPC C04B 28/085 (2013.01) [B28B 1/14 (2013.01); B28B 7/42 (2013.01); B28B 11/245 (2013.01); B28B 13/06 (2013.01); C04B 28/08 (2013.01); C04B 40/0231 (2013.01); C04B 40/0259 (2013.01); C04B 40/0263 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of producing a wet-cast slag-based concrete product comprising a slag-based binder and steps of:
obtaining a workable non-zero-slump concrete composition having a first water to slag-based binder ratio by weight of at least 0.2, a slump value in a range of 5 mm to 250 mm and a compaction factor ranging from 0.7 to 1.0;
casting the non-zero-slump concrete composition into a mould;
pre-conditioning the non-zero-slump concrete composition within the mould to produce a pre-conditioned 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, the pre-conditioning of the non-zero-slump concrete composition including flowing air through holes defined by the mould;
after the casting of the non-zero-slump concrete composition, and after the pre-conditioning of the non-zero-slump concrete composition within the mould, curing the pre-conditioned slag-based intermediate with a gas containing carbon dioxide to produce a moulded wet-cast slag-based concrete product, including subjecting the pre-conditioned slag-based intermediate to a positive pressure with the gas containing carbon dioxide by injecting the gas containing carbon dioxide through the holes defined by the mould, including increasing a pressure of the gas containing carbon dioxide inside the mould; and
after the curing of the pre-conditioned slag-based intermediate, demoulding the moulded wet-cast slag-based concrete product to provide the wet-cast slag-based concrete product.