Mark Holmquist / Wikipedia, Tiny Fox Lab
One of the reasons the Great Wall of China still stands after so many years, is due to a secret binding agent in the mortar: sticky rice. Around the year 500 A.D., the Chinese started mixing sticky rice soup with slaked lime to make very strong and weather resistant mortar. – Tiny Fox Lab Facts
Preview photo credit: Mark Holmquist / Wikipedia
Source: https://en.wikipedia.org/wiki/Sticky_rice_mortar
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