Which consequence resulted from mortar degradation in pre-modern masonry?

💡 Explanation

Decreased axial compression resistance arises from mortar degradation due to loss of cohesion (capillary action mechanism); because this reduced lateral support to masonry units directly. Therefore, structural integrity diminishes, rather than experiencing improved interlocking or changed expansive properties.

• During Roman sieges, which outcome arose from concentrated catapult fire eroding supporting soil around a city wall's base?
• Which outcome occurred with Roman 'circumvallation' fortifications, weakening siege defenses?
• Which consequence occurred when 18th-century shipwrights over-tightened oakum caulking?
• Which defensive outcome occurs when timber palisades erected by Roman legions during a siege become saturated with oil?
• Which consequence results when intensive chinampa cultivation reduces topsoil's salinity?
• Which outcome occurs when the freezing line penetrates within Inca constructed stone terracing?