Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1983-02-25
1985-06-25
Levy, Stewart J.
Measuring and testing
With fluid pressure
Porosity or permeability
249183, 249DIG4, G01N 1508
Patent
active
045246041
ABSTRACT:
A concrete permeability testing core comprises a cylinder of polymeric foam enclosed within an elastomeric envelope under tension. When placed in a cylindrical concrete mold in an axially concentric orientation, it can be used to form a concrete test specimen with a cylindrical cavity. After the concrete is cured and the outer concrete mold is removed, the polymer foam can be collapsed by contacting it with solvent for the foam. The elastomeric envelope, being under tension, contracts to a smaller size, permitting easy removal from the concrete and leaving a nascent cavity surface.
REFERENCES:
patent: 2986797 (1961-06-01), Aisenberg
patent: 3158906 (1964-12-01), Boyer
patent: 4017051 (1977-04-01), Scott et al.
Levy Stewart J.
Roskos Joseph W.
Walker William B.
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