Question

Coefficient of thermal expansion of concrete is ________ coefficient of thermal expansion in aggregates.

(a) Directly proportional

(b) Inversely proportional

(c) Equal

(d) More than

The question was asked in exam.

I'm obligated to ask this question of Factors Affecting Creep and Elasticity in chapter Elasticity, Creep and Shrinkage of Concrete Technology

Answer 1

Right choice is (a) Directly proportional

To elaborate: Coefficient of thermal expansion of concrete increases with the increase in coefficient of thermal expansion of aggregates and vice-versa.