Question

What C 231 test under the Standard ASTM test method?

(a) Test Method for Sampling Freshly Mixed Concrete

(b) Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

(c) Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

(d) Test Method for Temperature of Freshly Mixed Portland-Cement Concrete

The question was posed to me during an interview.

My query is from Flaws in Concrete and Remedial Measures, Quality of Concrete topic in section Quality Control of Concrete Technology

Answer 1

Correct answer is (c) Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

For explanation I would say: According to Standard ASTM test methods to evaluate field-placed concrete C231 test is for Air Content of Freshly Mixed Concrete by the Pressure Method.