Laboratory Permeability Measurement


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Title: Laboratory Permeability Measurement

Author(s): D. J. Janssen

Publication: Special Publication

Volume: 108


Appears on pages(s): 145-158

Keywords: concretes; measuring instruments; permeability; samples; tests; test equipment; General

Date: 8/1/1988

Equipment and procedures for measuring actual permeability of portland cement concrete are presented. The equipment is built from readily available parts and materials and requires only standard laboratory air pressure and vacuum sources. The sample size used is 3 in. (7.5 cm) diameter x 3-1/8 in. (8 cm) long, but other sample sizes could be used. Typical measurements are presented to show repeatability and time required for permeability testing. The equipment has been used for permeabilities as low as 1 x 10-11 cm/sec. Concrete with lower permeability would require equipment modifications and/or longer measurement times.