Textures look good, cement portion looks good, but its kind of unconvincing to not see the ridges on the silhouette of the rebar when its up that close, but if its something that won't be that up close its all good. Could just add a few edge loops and extrude the edges out if you can spare the polys, doesn't look like its very dense at the moment... or atleast make the bump/normal on it look more pronounced...
Not sure if it has a spec map yet, looks more like a smooth stone than cement, but im sure you're still tweaking it
good stuff !!