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What is M40 in psi?

M40 is a concrete mix design that typically has a compressive strength of 4,000 psi (pounds per square inch) at 28 days.


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The grade of concrete refers to its compressive strength measured in megapascals (MPa) or pounds per square inch (psi) after 28 days of curing. Common grades include M15, M20, M25, and so on, where the number indicates the characteristic strength of the concrete mix. Higher-grade concrete has a greater strength, making it suitable for structural applications requiring durability and load-bearing capacity. The selection of the appropriate grade depends on the specific requirements of the construction project.


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What is the ypung modulus for concrete?

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What is the ratio of compressive strength and the weight of corrugated box?

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