The ceramic disk used in null pressure plate apparatus does not allow the air to flow; however, free flow water is possible. Explain the mechanism associated with this behavior. If the purpose of ceramic disk is not to allow that air out from it; how can the air come out of the specimen?
The ceramic disk used in null pressure plate apparatus does not allow the air to flow; however, free flow water is possible. Explain the
In the lab, soil-water characteristic curves can be measured using common testing equipment like the pressure plate. This study describes a modified pressure plate device that uses a high air entry ceramic plate that is readily accessible in the market. Compared to the standard pressure plate equipment, the modified pressure plate apparatus has the following advantages: The water reservoir beneath the ceramic plate ensures that the ceramic plate is fully saturated at all times, whereas the conventional pressure plate can typically only determine the drying soil-water characteristic curve. Air that collects in the water reservoir due to air diffusion through the ceramic disc can be flushed out by the cross-flow system during the test without interrupting it.
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