ASTM D7243-11(2020),Standard Guide for Measuring the Saturated Hydraulic Conductivity of Paper Industry Sludges.
Paper industry sludges are industrial by-products derived from wastewater treatment operations at plants associated with the manufacturing of paper.
Referenced Documents
D7015/D7015M Practices for Obtaining Intact Block (Cubical and Cylindrical) Samples of Soils
ASTM D7243-11(2020) is intended to supplement ASTM D5084, Test Methods for Measurement of Hydraulic Conductivity of Saturated Porous Materials Using a Flexible Wall Permeameter.
The purpose of ASTM D7243-11(2020) is to provide additional guidance on issues relevant to testing sludges using Test Methods D5084.
ASTM D7243-11(2020) applies to specimens compacted in the laboratory using procedures such as those described in Test Methods D698 and D1557 or undisturbed specimens collected from the field using procedures such as Practice D1587/D1587M or Practice D7015/D7015M.
7. Selection of Effective Stress and Hydraulic gradient
7.1 Because paper industry sludges are compressible, their hydraulic conductivity is sensitive to the effective stress and hydraulic gradient applied during the test. Thus, the effective stress and gradient should be set so that field conditions are simulated as closely as possible. These conditions should be specified by the requestor. If no specification is required, the test shall be conducted at an average effective confining stress in the range of 15-35 kPa and a hydraulic gradient in the rangeof 10-20.

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