An article that I recently read, _Who Taught the Inca Stonemasons Their
Skills_, says that the Tiahuanacan masons, sometime betwen 200 BC to 1000 AD,
at Pumapunku possibly used a mortar composed of clay, lime and sand in 3:1:1
proportions. The workers of the Instituto Nacional de Arqueologia stated that
it was extremely hard to remove the stones that were bonded with this
material.
Has anyone here encountered, or played with, such a mortar mixture?
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