8 Causes Of Cracks In Concrete You Should Know

Causes Of Cracks In Concrete

Cracking is one of the most common problems in concrete and it should be avoided seriously. Different causes of cracks in concrete are described below.

1. Shrinkage

Shrinkage is one of the major causes of cracking in hardened concrete. In drying shrinkage, the volume of concrete is gradually decreased and if the component is restrained against free movement, tensile stresses are developed which causes cracks.

2. Temperature Changes

The temperature variation in concrete results in the differential volume change. When the tensile strain capacity of concrete exceeds due to the differential volume change, it will crack.

3. Chemical Reaction

Due to the alkaline nature of cement, it reacts with the carbon dioxide (CO2) present in the atmosphere resulting in an appreciable increase in the volume of the materials which finally leads to cracking.

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4. Poor Construction Practices:

Poor construction practices such as adding excessive water to the mix, lack of curing, poor compaction, using low-grade materials, unreasonable placements of construction joints, etc. are also responsible for cracking in concrete.

5. Errors In Design & Detailing

Errors in design and detailing such as an inadequate amount of reinforcement, improper design of foundation, precast members and slabs, improper selection of materials, lack of sufficient contraction joints etc may result in excessive cracking.

6. Construction Overloads & Early Formwork Removal

The load induced in the structure during construction can also lead to cracking especially at the younger stage when the formwork is removed earlier.

7. Elastic Deformation And Creep

The different components of the building such as wall, column, beam. slab etc undergo elastic deformation when loaded. The deformation of concrete depends on the type of building materials used in the construction such as bricks, cement concrete blocks, etc. This unusual deformation of concrete results in cracking.

8. Corrosion Of Concrete

The corrosion of steel develops a huge amount of iron oxides and hydroxide that have a much greater volume than the volume of metallic iron. Hence the volume is increased and cracks.

concrete cracks

Also Read

What Is Spalling Of Concrete?
How To Prevent Concrete Cracks

Types Of Cracks In Concrete

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