Approximate value of shrinkage strain in concrete, is A. 0.003 B. 0.0003 C. 0.00003 D. 0.03

The correct answer is A. 0.003.

Shrinkage is a property of concrete that causes it to decrease in volume over time. The amount of shrinkage depends on a number of factors, including the mix design, the curing conditions, and the environmental conditions.

The approximate value of shrinkage strain in concrete is 0.003. This means that for every meter of concrete, there will be a decrease in length of 0.003 mm.

Option B, 0.0003, is too small. Option C, 0.00003, is much too small. Option D, 0.03, is too large.