Question

As concrete dries, it shrinks—the higher the water content, the greater the shrinkage. If a concrete beam has a water content of w kg/m3, then it will shrink by a factor S = 0.032w − 2.5 10,000 where S is the fraction of the original beam length that disappears due to shrinkage. (a) A beam 12.067 m long is cast in concrete that contains 250 kg/m3 water. What is the shrinkage factor S? How long will the beam be when it has dried? (Round your answer to three decimal places.) m (b) A beam is 12.039 m long when wet. We want it to shrink to 12.027 m, so the shrinkage factor should be S = 0

Answer 1

So what´s the value fot the water content?

Answer 2

A beam is 12.039 m long when wet. We want it to shrink to 12.027 m, so the shrinkage factor should be
S = 0.0010.
What water content will provide this amount of shrinkage? (Round your answer to the nearest whole number.)