What provision can be made to avoid cracks in concrete?
First of all concrete is supposed to crack, as concrete hardens it begins to shrink, thus the reason for control joints.( see joints below ) There are many reasons why concrete cracks. Cracks rarely affect structural integrity. The majority of concrete cracks in flat work usually occur due to improper design and construction practices, such as omission of isolation & control joints, improper jointing practices, improper sub grade preparation, lack of reinforcements, the use of high slump (very wet) concrete (occurred by the addition of excessive water to concrete trucks on site) or improper finishing techniques and inadequate curing.
