Overworld Antimatter Chemistry Compatibility

I made this mod for my modpack which is a modified version of Dark_Arcana's modpack Antimatter Chemistry. I made this mod so it's playable in a vanilla overworld. 

The mod adds white and light grey concrete to sometimes generate in stone in large veins. That's all the mod changes but it's just enough to make the modpack playable. I might update the mod to have an adjustable config for how often the concrete spawns, but I think it's good as it stands right now.