Summary Draft 1 : How Volcanic Ash Strengthens A Roof Against Powerful Projectiles


In the article “How Volcanic Ash Strengthens A Roof Against Powerful Projectiles”, Williams (2019) states that the possibility of adding layers of volcanic ash on the roofs could mitigate the impact of volcanic projectiles on shelters around active volcanoes.

Williams claims that scientists had discovered mountain huts were capable of providing life-saving shelter for hikers during the eruption that took place at Mount Ontake, Japan 2014. This finding inspired the scientists to further study on how the addition of volcanic ash on roofs could reduce impacts of projectiles. Through meticulous simulation, scientists were able to deduce that the thickness of ash deposit is proportional to the energy absorption rate. However, heavier loads of ash may affect the structural integrity of the roof. Further investigation still needs to be conducted to determine the optimum range of ash deposit layers, to achieve a balance between reducing impact of projectiles and risk of roof collapse.

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