Which risk increases when Roman road construction deviated from standard compact layering of aggregate base?

💡 Explanation

When layered compaction is skipped, load distribution weakens because poorly interlocked aggregates cause differential settlement and shear stress concentration, exceeding material's inherent friction limits. Therefore, reduced load distribution creates instability, rather than frost heave, erosion, or thermal cracking which are normally countered with properly engineered drainage and layering.

• Which structural issue commonly arose when Roman fort designers failed to ensure proper drainage behind defensive walls?
• Which risk increased in early Mesoamerican maize agriculture via genetic selection for larger kernels on the central cob?
• Which structural weakness limited the maximum scaling size of Roman ballistae for siege warfare?
• Which mechanism limited the construction height of Gothic cathedrals before introduction of iron reinforcements?
• Which outcome resulted from the practice of chinampa agriculture as water salinity increased?
• Which mechanical effect most limited long-distance paved road construction during the Roman Empire?