Field device to measure viscosity, density, and other slurry properties in drilled shafts : final report.
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Field device to measure viscosity, density, and other slurry properties in drilled shafts : final report.

Filetype[PDF-20.87 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
  • English

  • Details:

    • Contributors:
    • Corporate Contributors:
    • Resource Type:
    • Geographical Coverage:
    • Edition:
      Final report
    • Abstract:
      Proper performance of mineral slurries used to stabilize drilled shaft excavations is maintained by assuring the

      density, viscosity, pH, and sand content stay within state specified limits. These limits have been set either by

      past experience, research findings and/or by manufacturer recommended values. However, field slurry testing

      is time consuming as all measurements are manually performed. With the overwhelming advances in digital

      down-hole devices, it is not unreasonable to assume that slurry property tests are equally applicable to this

      trend.

      The most commonly used test to indicate slurry viscosity is the Marsh Funnel Test which is essentially a

      timed flow for a fixed volume of slurry to exit a falling head funnel. Using a library of unique pressure versus

      flow rate responses for a wide range of slurry viscosities, an automated downhole device was designed and

      tested that incorporated these information to estimate viscosity in the excavation without the need to remove

      slurry in order to test. Direct measurement of slurry density was also incorporated into the device and the sand

      content was computed from density and the viscosity where the suspended solids that make up the density

      stems from both the slurry products and the soil cuttings.

      The prototype down-hole slurry testing system was shown to be surprisingly easy and fast to use

      despite the experimental nature of the device. A shaft sampled at 6 different depths was tested in less

      than 10 minutes. In contrast, conventional, manually performed testing were estimated by contractors

      to have taken more than an hour to perform the same number of tests.

    • Format:
    • Main Document Checksum:
    • File Type:

    Supporting Files

    • No Additional Files

    More +

    You May Also Like

    Checkout today's featured content at rosap.ntl.bts.gov

    Version 3.20