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What is the 7th day compressive failure stress in N/mm^2?

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What is the 7th day compressive failure stress in N/mm^2?

(a) 40

(b) 1500

(c) 38

(d) 180

The question was asked in unit test.

Origin of the question is Concrete Cloth, Polymer Impregnated Concrete topic in chapter Special Concrete and Concreting Methods of Concrete Technology

1 Answer

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Best answer
Right option is (c) 38

Easiest explanation: This test is based on ASTM C473 – 07 and the 7th day compressive failure stress is 38 N/mm^2.

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