It's a point source of carbon, which is the best case for capture. Some of the carbon could be made into plastic (particularly polyoxymethylene would be easy) although you might find that demand is saturated well before you have used up all of the capture.
Bigger problem is that due to the extreme temperatures required (the essential crystal structure, called alite, can only form above 1250 C) the facilities are large, expensive to construct and difficult to modify. Because the reaction produces a dust plume, they are often sited in less regulated jurisdictions, which compounds the problem. But capturing the carbon and capturing the dust likely require some common components.
This is arguably an opportunity for Latin America, which has historically had low local cement production due to tighter environmental regulations vs Asia. Its road and rail infrastructure lags as a result. (The durability of PC is also highly desirable in tropical environments!) But a proper implementation of clean cement is not yet well understood, and economic incentives for cleaner imports are merely theoretical at this point.