Which risk increases when the mortar within a dry stone wall erodes?

💡 Explanation

An absence of mortar in dry stone walls increases lateral thrust, due to reduced interlocking. This occurs when erosion compromises friction; therefore, a wall is likely to bulge outward rather than experience shearing, because tensile strength relies on cohesive bind.

• Which outcome results from exceeding the Curie temperature in early magnetic compass needles?
• Which risk increases when a wooden ship hull experiences delamination during age of sail?
• Which destructive result arose should increased hydrostatic stress occur on a Roman-era dam?
• Which long-term structural issue was compounded in Mesopotamian ziggurats from repeated surface re-plastering?
• Which risk increases when Roman fortifications use timber-laced walls on unstable ground?
• Which outcome accelerated soil degradation in some pre-Columbian Andean terrace farming systems?