Masters Theses

Keywords and Phrases

Annular Seal; Bentonite; Cement-Bentonite; Grout; Hydraulic Conductivity; Permeability

Abstract

"Grout is the material used in the annulus of water supply and monitoring wells to prevent movement of water from adjacent formations or from the land surface into the well. Grout is critical for preventing cross-contamination of aquifers through a borehole when a single well penetrates multiple aquifers and for protecting aquifers from surface contamination. The composition and emplacement of grout is regulated in most states, with standard mixes of bentonite and cement being the most widely used types of grout. Despite widespread adoption of grout regulations, surprisingly little literature is available to describe the effectiveness of different grout mixtures. This study investigates the effectiveness of three bentonite-cement mixes (3%, 6%, and 12% bentonite by weight) and cement grout without bentonite. The study tests the hydraulic conductivity of each mixture as a function of grout composition and bonding of grout to the well casing. Results show that as the ratio of bentonite is increased the hydraulic conductivity decreased, however between 3% and 6% bentonite the hydraulic conductivity begins to increase"--Abstract, page iii.

Advisor(s)

Grote, Katherine R.

Committee Member(s)

Gertsch, Leslie S.
Rogers, J. David

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geological Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2017

Pagination

viii, 46 pages

Note about bibliography

Includes bibliographical references (page 45).

Rights

© 2017 Amy Lynn Norval

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11107

Electronic OCLC #

992440517

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