Civil Engineering Materials #$8\mathrm{.}11$

Why is it important that the concrete masonry units meet certain absorption requirements?

A portion of a normal$-$weight concrete masonry unit was tested for absorption and moisture content and produced the following weights:

weight of unit as received $=4\mathrm{.}3lb$

saturated weight of unit $=4\mathrm{.}7lb$

oven$-$dry weight of unit $=4\mathrm{.}2lb$

immersed weight of unit $=2\mathrm{.}1lb$

Calculate the absorption in and the moisture content of the unit as a percent of total absorption$.$ Does the absorption meet the ASTM C$90$ requirement for absorption$?$