Slurry viscosity is also directly related to filter cake permeability. In slurry wall construction and other applications, the viscosity of a slurry must be maintained at a level high enough to assist in stabilizing the trench walls. Marsh of Los Angeles who published the design and use of his funnel viscometer in 1931. Note 1-The development of the Marsh Funnel is credited to Hallan N.
In this test, it is assumed that the apparent viscosity of a slurry is directly related to the flow duration through a specially shaped funnel (the Marsh Funnel). Relative changes in slurry viscosity can be identified using Marsh Funnel measurements and modifications can be made to mixing and handling procedures. The Marsh Funnel Viscosity test can be used for field quality control of slurries.
Viscosity is a fundamental characteristic for slurries in construction applications. This test method allows for the assessment of an apparent viscosity of clay slurries in the laboratory and in the field.
