Which of the following is NOT a basic ingredient of concrete?

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Multiple Choice

Which of the following is NOT a basic ingredient of concrete?

Explanation:
Steel is not a basic ingredient of concrete. Concrete is formed from cement and water to create the paste, plus aggregates such as sand and gravel to add bulk and strength. Air voids can be present or introduced to improve workability and durability, but they aren’t a fundamental ingredient in the mix like cement and water. Steel is used as reinforcement in reinforced concrete, embedded separately to carry tensile loads, and is not part of the concrete matrix itself. That’s why steel isn’t considered a basic ingredient.

Steel is not a basic ingredient of concrete. Concrete is formed from cement and water to create the paste, plus aggregates such as sand and gravel to add bulk and strength. Air voids can be present or introduced to improve workability and durability, but they aren’t a fundamental ingredient in the mix like cement and water. Steel is used as reinforcement in reinforced concrete, embedded separately to carry tensile loads, and is not part of the concrete matrix itself. That’s why steel isn’t considered a basic ingredient.

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