Concrete that is buried below the ground will usually weather faster than that above ground. This is because

Question

Quizplus · Accepted Answer

Carbonic acid solution, formed from the reaction of water and carbon dioxide, can dissolve concrete. The soil typically has more water than the air, which can make the concrete below ground level more susceptible to carbonic acid attack. Therefore, options A and B are correct. Exfoliation is a process where the surface of the concrete erodes and peels, and it occurs more frequently in areas with a freeze-thaw cycle. It is less likely to occur below ground because the temperature remains relatively constant. Therefore, option C is not correct. As a result, the best choice is D because it includes A and B, which are both true.

Concrete That Is Buried Below the Ground Will Usually Weather