Why Do Practical Columns Crack? Here Are the Causes

Practical columns play an important role in reinforcing building walls, ensuring they remain sturdy and prevent cracking. However, in some cases, practical columns crack after construction is complete. These cracks not only disrupt appearance but can also indicate structural problems that require attention. Let's discuss the main causes!

1. Improper Cement Mixture

One of the most common causes of practical column cracks is an unbalanced mixture of cement, sand, and water. Too much water in the mixture weakens the concrete, making it prone to cracking after it dries.

Solution:
Use a standard mixture ratio, for example, 1 part cement: 2 parts sand: 3 parts gravel, with just enough water. Avoid using a mixture that is too runny for strong results.

2. Improper Curing or Concrete Curing
Many workers skip the curing process (concrete curing) after pouring. Without proper curing, concrete will quickly lose moisture and develop shrinkage cracks.

Solution:
Wet the columns regularly for 7–14 days after pouring to maintain moisture and prevent premature cracking.

3. Inadequate Reinforcement Installation
Improperly installed steel reinforcement can cause uneven load distribution, causing excessive pressure at certain points and ultimately causing cracks.

Solution:
Ensure the spacing between reinforcement bars is as per the working drawings and securely fasten them with binding wire to prevent shifting during casting.

4. Vibration or Ground Movement
Cracks in concrete columns can also be caused by vibrations from heavy equipment, large vehicles, or ground movement around the building. This condition usually occurs in buildings in densely populated areas or near highways.

Solution:
Use a stable foundation and ensure the columns have strong connections to the main structure to withstand external vibration forces.

5. Substandard Material Quality
Using low-quality materials such as dirty sand or cement that does not meet SNI standards can drastically reduce the strength of the concrete.

Solution:
Always choose building materials from trusted suppliers that provide products that meet SNI standards, for stronger and more durable end results.

Conclusion
Cracked concrete columns are no small matter — they can impact the durability and safety of a building. Therefore, it is important to ensure proper material quality, workmanship, and post-casting maintenance.

💡 Use practical, high-quality columns from PT Intisumber Bajasakti (ISBS) — a trusted supplier of SNI-compliant building materials and steel for various construction projects in Indonesia.
📞 Tel: 021-66675999
🌐 Web: intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

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