Why Can Concrete Casting Quality Crack Quickly? This is the Cause!

Concrete casting is the main element in building construction that functions to provide strength and durability to the structure. However, it is not uncommon to find that newly cast concrete has cracked. Why does this happen? Here are some of the main causes of concrete cracking quickly and how to overcome them!

1. Improper Concrete Mix
Causes:

• The ratio of cement, sand, gravel, and water is not right.
• Too much water in the concrete mixture makes the concrete weaker.
• The quality of the materials used is not up to standard.

Solution:
Use the correct proportions of the concrete mixture, according to construction needs. Ideally, use concrete with SNI quality standards to ensure optimal strength.

2. Uneven Mixing Process
Causes:

• Incomplete manual mixing causes the concrete to be non-homogeneous.
• Coarse and fine aggregates are not mixed properly.
• Use of inadequate mixers.

Solution:
Use a concrete mixer or mechanical mixer so that the mixture is more even and its quality is maintained.

3. Improper Casting Process
Cause:

• Concrete is poured too long after mixing, so it starts to harden before being applied.
• Lack of compaction during casting, so there are air cavities in the concrete.

Solution:

• Make sure the concrete is poured immediately after mixing is complete.
• Use a concrete vibrator so that the mixture is denser and there are no air cavities.

4. Concrete Shrinkage That Is Too Fast
Cause:

• Concrete dries too quickly due to hot weather or strong winds.
• No maintenance (curing) after casting.

Solution:

• Carry out curing (concrete maintenance) by sprinkling water or covering the concrete surface with plastic or wet sacks for 7 days so that drying is more even.
• Avoid casting in direct sunlight.

5. Effect of Load Before Concrete Hardens Perfectly
Cause:

• Concrete is immediately loaded before reaching maximum strength.
• Formwork is removed too quickly.

Solution:

• Wait for the concrete to reach a minimum age of 28 days before applying heavy loads.
• Make sure the formwork remains in place until the concrete is strong enough.

6. Poor Material Selection
Causes:

• Use of low-quality cement.
• Sand contains mud or dirt.
• The water used contains hazardous chemicals.

Solution:

• Use high-quality building materials and make sure the sand and water used are clean and free from contamination.

Conclusion: How to Prevent Concrete from Cracking Quickly?

• To ensure that the concrete casting is durable and does not crack easily, pay attention to the following:
• Use SNI quality materials.
• Make sure the composition of the concrete mixture is correct.
• Do mixing and casting with the right technique.
• Cure the concrete after casting to prevent drying too quickly.
• Do not apply excessive loads before the concrete reaches maximum strength.

Need Quality Concrete Materials? Contact PT Intisumber Bajasakti!
PT Intisumber Bajasakti provides various high-quality building materials, including cement, reinforced concrete, wire mesh, and other construction materials that meet SNI standards.

📞 Call us now: +6221 66675999
🌐 Visit our website: www.intisumberbajasakti.com

Don't let your building structure become fragile due to easily cracked concrete! Ensure its quality from the start!

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