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

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

anonymous · Answer

So what´s the value fot the water content?

anonymous · Answer

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.)