Different types of Cracks in Concrete. 1. Plastic Shrinkage Cracks Hairline cracks in fresh concrete surface due to rapid drying. 2. Settlement Cracks – Diagonal cracks caused by uneven foundation settlement. 3. Drying Shrinkage Cracks – Random, map-like cracks due to loss of moisture. 4. Thermal Cracks – Long, straight cracks from temperature changes. 5.…