Which increased weathering outcome appears when dissimilar stone types are mortared together on ancient structures?

💡 Explanation

Spalling results from differential thermal expansion; because different stone types expand/contract differently with temperature shifts, differential stress develops at the mortar joints resulting in fracturing therefore creating areas of vulnerability rather than uniform weathering.

• Which outcome arises because limestone formations saturate during excessive Roman concrete curing?
• Which outcome arises when an ancient Chinese crossbow uses poorly refined gunpowder, affecting its firing range?
• Which outcome occurs due to uneven tension during medieval silk production?
• Which consequence resulted in celestial navigation accuracy when late 1700s-era sextants suffered from thermal expansion?
• Which limitation affected early applications of algebra within water distribution systems described by Al-Karaji?
• Which inherent risk increased in early chinampa agriculture during peak pre-Columbian population densities?