Cracking is the complete or partial separation of concrete by breaking or fracturing, leading to cracks. Concrete structures... moreCracking is the complete or partial separation of concrete by breaking or fracturing, leading to cracks. Concrete structures may develop cracks for several reasons including temperature and plastic shrinkage variations, thermal variations, shrinkage shrinkage due to drying shrinkage shrinkage shrinkage chemical reactions weathering processes structural overloading.