Answer :

Final answer:

A 1:2:4 concrete mix ratio generally refers to the ratio of cement, sand, and aggregates and tends to have an estimated strength of about 2500 to 3000 psi after proper curing, though actual psi can vary based on specific conditions.

Explanation:

The student's question regarding the mixture of 1:2:4 and its strength does not directly relate to any of the provided figures or extracts that discuss pressures in gases, hydraulic presses, or fluid dynamics. However, based on common construction knowledge, a 1:2:4 mixture typically refers to the ratio of cement, sand, and aggregates used in concrete. The strength of a concrete mix with a 1:2:4 ratio generally ranges, but it does not specifically equate to an exact psi (pounds per square inch) value without additional information like water-cement ratio, cure time, and the specific materials used. Nevertheless, as a rough guide, conventional concrete of this mix ratio might be expected to achieve a strength of about 2500 to 3000 psi after 28 days of curing under standard conditions. However, please note that this is a ballpark figure and the actual strength can vary based on numerous factors.

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