The Use of Bituminous Materials by Mixing Methods

Blanchard, Arthur H.; Pillsbury, F. C.; Eppele, Frank J.; Cornell, William H.; Meeker, R. A.; Smith, Francis P.; Richardson, Clifford; Howard, J. W.; Sargent, Paul

doi:10.1061/taceat.0002301

T. Am. Soc. Civ. Eng.

1911

DOI: 10.1061/taceat.0002301

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The Use of Bituminous Materials by Mixing Methods

Arthur H. Blanchard¹,

F. C. Pillsbury²,

Frank J. Eppele

et al.

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1998

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Dipole Probe: Design and Field Applications of a Single‐Borehole Device for Measurements of Vertical Variations of Hydraulic Conductivity

Zlotnik

Zurbuchen

1998

Groundwater

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A dipole probe (DP) for measuring vertical variations of hydraulic conductivity has been designed, constructed, and tested in field conditions. The variable‐length device designed for the dipole flow test (DFT) consists of three packers separated by changeable spacer rods. The assembled DP is lowered into a well with a long screened interval. The packers are inflated, isolating two screened sections (chambers) between them. A small submersible pump, mounted on the central packer, transfers water from the upper (extraction) chamber into the lower (injection) chamber. This simultaneous injection and extraction creates a recirculatory flow within the aquifer. The chamber head responses are measured by two pressure transducers in the DP chambers. The DP can be used at discrete intervals along the entire well screen length. The DP has been successfully tested in a specially constructed well with a continuous screen in a highly conductive sand and gravel aquifer. During drilling, disturbed samples were collected using the split spoon method and the vertical profile of K was estimated from grain‐size analysis. A total of 153 DFTs were performed with various DP geometries. Results indicate that the chamber head changes are sensitive to aquifer properties, reach steady state rapidly, vary linearly with redrculation pumping rate, and can be controlled by changes in DP dimensions. Vertical profiles of K compare well with grain‐size analysis estimates.

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Dipole Probe: Design and Field Applications of a Single‐Borehole Device for Measurements of Vertical Variations of Hydraulic Conductivity

Zlotnik

Zurbuchen

1998

Groundwater

View full text Add to dashboard Cite

show abstract

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The Use of Bituminous Materials by Mixing Methods

Cited by 1 publication

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Dipole Probe: Design and Field Applications of a Single‐Borehole Device for Measurements of Vertical Variations of Hydraulic Conductivity

Dipole Probe: Design and Field Applications of a Single‐Borehole Device for Measurements of Vertical Variations of Hydraulic Conductivity

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