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What C138 test under the Standard ASTM test method?

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What C138 test under the Standard ASTM test method?

(a) Test Method for Making and Curing Concrete Test Specimens in the Field

(b) Test Method for Compressive Strength of Cylindrical Specimen

(c) Test Method for Unit Weight, Yield, and Air Content (Gravimetric) of Concrete

(d) Test Method for Slump of Hydraulic Cement Concrete

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This question is from Flaws in Concrete and Remedial Measures, Quality of Concrete topic in division Quality Control of Concrete Technology

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The correct answer is (c) Test Method for Unit Weight, Yield, and Air Content (Gravimetric) of Concrete

Easy explanation: According to Standard ASTM test methods to evaluate field-placed concrete C138 test is for Test Method for Unit Weight, Yield, and Air Content (Gravimetric) of Concrete.

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