Effects of indentation speed and water saturation level on the behavior of Roubidoux sandstone

Resource Information

The work Effects of indentation speed and water saturation level on the behavior of Roubidoux sandstone represents a distinct intellectual or artistic creation found in University of Missouri-Kansas City Libraries. This resource is a combination of several types including: Work, Language Material, Books.

Label

Effects of indentation speed and water saturation level on the behavior of Roubidoux sandstone

Statement of responsibility

by Azupuri Ayerikujei Kaba

Creator

• Kaba, Azupuri Ayerikujei

Author

• Kaba, Azupuri Ayerikujei

Subject

• Rock mechanics -- Research
• Sandstone
• load indentation, rock excavation, Roubidoux sandstone, saturation, specific energy, specific penetration
• Water-rock interaction
• Fracture mechanics

Language

eng

Summary

"The experiment conducted in this research was to determine the behavior of a porous rock under an indenter. To investigate this, medium-grained sandstone was subjected to a series of indentation tests. These tests were conducted under both dry and saturated conditions using a rounded conical indenter. In addition, tests were conducted at different indentation speeds. The test results were used to calculate the mechanical specific energy (SE) and specific penetration (SP). The porewater pressure evolution in the saturated sample was also monitored. The tests and subsequent analyses reveal that saturation did not affect the specific energy when the indentation rate was 0.3 mm/sec. However, as the indentation rate increased to 20 mm/sec, a 32% decrease in specific energy was observed (significant at 80% confidence). The specific penetration, on the other hand, appeared not be affected by saturation at either indentation speed. The variability in SE and SP was assumed to be controlled by three factors: saturation, loading rate, and rock properties. The water saturation was expected to be the major factor to affect the overall behavior of the rock beneath the indenter. However, the porewater pressure measurements showed that, though there was a statistically significant pore pressure buildup rate with increasing indentation rate, the maximum pore pressure magnitude was too small to affect the loading pressure. Variability in the rock properties could also cause this variation, but more data are required to separate the rock property effects from saturation and indentation speed effects."--Abstract, page iii

Member of

• MST thesis. Geological Engineering (M.S., 2014).

Cataloging source

UMR

Degree

M.S.

Dissertation year

2014

Granting institution

Missouri University of Science and Technology

Illustrations

illustrations

Index

no index present

Literary form

non fiction

Nature of contents

• dictionaries
• bibliography
• theses