This is How They Built the Inca Stone Walls

This item is an excellent walk through of the observed construction.  All this so far, strikes me as been produced during the Bronze Age.  Most important though is that these blocks are fitted on the edges and not surface to surface.  Actual filler is used out of sight.

Obviously, we are cutting granite blocks and moving them a fair distance.  Movement is possible with dragging for all of these blocks.  Using an acid can be used to tighten the contact.  they had it to hand and easily could have applied it.

This paper tells us how it was done in the time and place using tech that could be assembled in place.

There are plenty of difficult questions for ancient construction, but this is no longer one of them.  And surface glazing is using a blow torch to hand normally for popcorning a mine face.

This is How They Built the Inca Stone Walls | Ancient Architects

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On the reddish, glittery mud the Inca used for perfecting their stone masonry

2017, Sift Desk Journals

Due to its impressive appearance, Inca masonry, which mostly consists of volcanic, silica containing rock material, has received much attention. A high level of understanding has consequently been reached of the diverse working steps and tools applied. An exception is the reddish mud, “llancac alpa” in the quechua language, and the “gold”, mentioned by early chroniclers as mortar which fitted the stones and later disappeared. Such techniques were related to folklore and not taken seriously. This study tries to understand them and the question was asked: did Inca builders have access to very acid mud? They did, and used the acid mud from their mines, which generated sulphuric acid through bacterial oxidation of pyrite (fools gold). It reaches an acidity of up to pH = 0.5, which is 104 times more acid than humic acid which is known to weather silica containing rocks via silica gel to the clay mineral kaolin. This acid mud allowed dissolving and softening the rock material superficially to a viscoelastic silica gel. The process could be