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What is the minimum swelling pressure of concrete in psi?

1. 1,500

2. 2,000

3. 3,000

4. 4,000

The correct answer is: 3,000

The minimum swelling pressure of concrete is significant as it provides insight into its ability to withstand expansion caused by moisture absorption, which can lead to cracking and other structural issues. In structural engineering and building inspections, understanding swelling pressure helps assess durability and performance under varying environmental conditions. Concrete typically has a minimum swelling pressure of 3,000 psi. This value reflects the ability of concrete to resist forces that arise from expansion due to water content, ensuring that the material can maintain integrity over time and under stress. Knowing this minimum pressure is crucial for engineers and inspectors to evaluate the quality and appropriateness of concrete in various applications, particularly in areas with high moisture levels. The other values presented don't align with the established minimum standard for swelling pressure in concrete. Hence, they do not represent the correct baseline that professionals in the field should be aware of when assessing concrete durability.