Why are admixtures added to concrete?

Why are admixtures added to concrete

1. The purpose of adding admixtures is to improve the performance of concrete, improve project quality, reduce project costs, and promote new process requirements.

2. The performance of concrete is determined by the proportion of cement, sand, gravel and water. In order to improve a certain performance of concrete, the proportion of raw materials can be adjusted, but this will often cause another problem. loss.

3. In order to increase the fluidity of concrete, the amount of water can be increased, but this will reduce the strength of concrete.

4. In order to improve the early strength of concrete, the amount of cement can be increased, but in addition to increasing the cost, this may also increase the shrinkage and creep of concrete.

5. The above defects can be avoided by using admixtures. Using concrete admixtures can greatly improve certain properties of concrete while having little effect on other properties of concrete.

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