Size influence on the sealing performance of cementitious borehole plugs.

Hydraulic conductivity tests were performed on expansive mixes of ideal class A cement plugs cast in basalt blocks and in steel pipes. Plug diameters range from 25 mm (1 inch) to 200 mm (8 inches), with most of the tests reported performed on plugs in the upper end of this range (150 mm (6 inch) and over). Cement curing temperatures were monitored, as well as pipe strains induced by cement swelling. As a result of the (unintentional) block fracturing, it became possible to study the hydraulic conductivity of the fractured, bypass flowpaths around the plugs.


Shear strength of cement-grout borehole plug
Akgün, Haluk (2000-01-01)
The theoretical normal stress and shear strength distributions along the plug-rock interfaces of axially loaded expansive cement-grout borehole plugs cast in rock cylinders, determination of interfacial shear strength parameters, and experimental analyses of plug-rock mechanical interactions are presented as a function of uniform curing and testing temperature and of borehole size. The results of the back analysis show that the angle of internal friction along the plug-rock interface remains almost constant...
Production and heat treatment of 6111 aluminum alloy sheet for car body panel application
Sevimli, Aylin; Kalkanlı, Ali; Department of Metallurgical and Materials Engineering (2015)
Aluminum is one of the major candidates to supply sufficient weight reduction without missing mechanical properties and performance. Therefore, studies have been focused on improving properties of aluminum in automotive application since 1920s. Heat treatable aluminum alloy are used in car body panels of automotive application such as 2xxx, 7xxx and 6xxx series aluminum alloys base on the mechanical properties. On the other hand, based on physical and economical properties 6xxx series aluminum alloys are wi...
Influence of elevated temperature on axially loaded expansive cement grout borehole plug sealing performance
Akgün, Haluk (Thomas Telford Ltd., 2000-10-01)
The strength of expansive cement grout borehole plugs cast in rock cylinders is investigated theoretically and experimentally as a function of curing and testing temperature of the plugged rock cylinder and of borehole size. The distributions of thermally induced stresses and displacements, shear stresses along the plug-rock interface due to an axial stress applied to the plug, and resultant interfacial shear stresses due to a combination of uniform elevated temperature and axial load are studied and analys...
Performance assessment of cement grout borehole plugs in basalt
Akgün, Haluk (Elsevier BV, 1994-01-01)
Flow tests have been conducted on expansive cement grout plugs with diameters of 160 mm and 200 mm, and length-to-diameter ratios of one, in boreholes in basalt blocks and in steel pipes. Two types of flow tests have been performed: pseudo-constant head tests and transient pulse tests. Hydration temperatures of cement grout plugs have been monitored in steel pipes with inside diameters ranging from 110 mm to 200 mm. During flow tests, basalt blocks have fractured, presumably due to water injection pressure,...
Microstructural characterization and tensile properties of hot pressed Al-SiC composites prepared from pure Al and Cu powders
Ögel, Bilgehan; Gürbüz, Rıza (2001-03-31)
A conventional hot pressing method was used to produce Al-Cu-SiC particulate metal matrix composites. The matrix alloy was prepared from elemental powders of Al and 5 wt.% Cu. The composite comprises 13.3 or 27.2 vol.% SiCp with an average size of 10 mum. The powder mixtures were hot pressed uniaxially under nitrogen atmosphere. It is shown that Cu aids in the Formation of a liquid phase. Practically pore free structures are obtained after pressing at 600 degreesC, Elastic modulus, tensile strength and yiel...
Citation Formats
H. Akgün, “Size influence on the sealing performance of cementitious borehole plugs.,” 1986. Accessed: 00, 2021. [Online]. Available: