Failed Stone Problems and Solutions with Concrete : thermal hysteresis, impact, efflorescence, surface defects, discoloration, corrosion, structure, leakage, calcite crystals, stone thickness, thermal cycling, installation techniques, stone testing, blast design, how can buildings be protected from impact, brick and mortar joints, wicking from soil, how can efflorescence be removed, surface defects, curling of concrete slabs, surface defects in brick and terracotta, building stone surface finishes, how can surface defects be avoided and repaired, water cement ratio, calcium chloride.