Limestone NAPAP study

Shelburne Marble from Vermont, used for example in the Jefferson Memorial, and Salem Limestone from Indiana, as used in the National Cathedral, were obtained as sample stock materials. Each of the two stone stocks was selected as a monolithic block and was cut into slabs measuring 610 x 305 x 51 mm, under the supervision of NAPAP personnel (7-8). Selected slabs were used to fabricate briquettes, which were employed for several of the damage studies. Briquette dimensions are shown in Figure 2. Surface finishes typical of those provided on stone used for exteriors of buildings were employed on what would become the skyward surfaces of slabs and briquettes an 80-grit ground surface was produced on marble, and a "smooth planar... 

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See also in sourсe #XX -- [ , , , ]

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