Which of the following characteristics is the least desirable in a building stone used for foundation construction?
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A.
High water absorption
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B.
Good durability
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C.
Low porosity
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D.
High compressive strength
Correct Answer:
A. High water absorption
Explanation:
High water absorption is the least desirable characteristic for foundation stones because it significantly compromises structural integrity. When stones absorb excessive moisture, they become vulnerable to damage from freeze-thaw cycles, where expanding ice causes internal cracking and splitting. Furthermore, high water content can trigger chemical reactions, such as efflorescence or the leaching of minerals, which leads to the gradual disintegration and weakening of the stone over time. Ideal foundation materials should instead prioritize high compressive strength, low porosity, and excellent durability to withstand environmental stress and support the building's load.
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