Concrete driveways,walkway or sidewalk generally provides a convenient and easily maintained path between features within a home landscape, but if a section of concrete is extremely cracked or otherwise damaged, it can be difficult to traverse and potentially even dangerous. While you can simply patch minor cracks or pitting, an extensively damaged section of concrete may require placement. To replace the damaged concrete, the existing section must be safely broken up and the underlying foundation properly prepared before you can pour new concrete.