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What is the value of modulus of elasticity?

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What is the value of modulus of elasticity?

(a) 60-115 MPa

(b) 10-16 MPa

(c) 35-50 GPa

(d) 500 GPa

I had been asked this question in semester exam.

This question is from Sulphur Infiltrated Concrete, FRC topic in section Special Concrete and Concreting Methods of Concrete Technology

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Correct option is (c) 35-50 GPa

For explanation I would say: 35-60 GPa is the range of modulus of elasticity for the Sulphur infiltered concrete whereas the OPC has the range of 25-28 GPa.

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