Sphinxstone

Description

[Sphinx Acoustical Company] An acoustic Cast stone produced by the Sphinx Acoustical Company. In 1934, Sphinxstone was used in the construction of the Mellon Auditorium in Washington DC. During restoration of the building, visual inspection of the stone indicates that mollusk shell, and white Portlands were used in the concrete mixture. Other fillers and binders are unknown.

Sphinxstone label

Resources and Citations

Scott Lynn Paden, Citadel DCs contributed information, June 2022.
Richard Pieper, 'The Maintenance, Repair and Replacement of Historic Cast Stone' NPS, Technical Briefs #42 Link

Sphinxstone

Description

Resources and Citations

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Sphinxstone

Description

Resources and Citations

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