A one-dimensional column test was conducted on a sediment sample. The column had a crosssectional area of 50 cm2 and the sample has a porosity of 0.25. Deionized water was pumped through the column until it came to a steady-state condition. A chloride solution at a concentration of 100 mg/L was then passed through the column at a rate of 10 mL/min for the remainder of the experiment. The length of the column was 0.16 m. After 30 minutes the water eluting from the column had 70 mg/L of chloride. Calculate the value of DL and alphaL for the soil in the column.

A one-dimensional column test was conducted on a sediment sample. The column had a crosssectional area of 50 cm2 and the sample has a porosity of 0.25. Deionized water was pumped through the column until it came to a steady-state condition. A chloride solution at a concentration of 100 mg/L was then passed through the column at a rate of 10 mL/min for the remainder of the experiment. The length of the column was 0.16 m. After 30 minutes the water eluting from the column had 70 mg/L of chloride. Calculate the value of DL and alphaL for the soil in the column.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

A one-dimensional
column test was conducted
on a sediment sample. The column had a
crosssectional area of 50 cm2 and the sample
has a porosity of 0.25. Deionized water was
pumped through the column until it came to a
steady-state condition. A chloride solution at a
concentration of 100 mg/L was then passed
through the column at a rate of 10 mL/min for
the remainder of the experiment. The length of
the column was 0.16 m. After 30 minutes the
water eluting from the column had 70 mg/L of
chloride. Calculate the value of DL and alphaL
for the soil in the column.

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