|Maya Initiative (1999–2009)
In situ trials of mortar removal and repointing were carried out in two locations on the Stairway using mortar mixes similar to ones tested in the laboratory. Reconstruction mortar was removed with a hammer and chisel to a depth approximately equivalent to the width of the joints and was therefore not necessarily completely removed. The joints were then filled with mortar slightly below surface level of the block, and, when large voids were present, stone chinkers were inserted. The mortar was compacted using pointing keys and surface-finished the same day or the following day with wet spray and sponge. Photo: Elsa Bourguignon.