NIOSHTIC-2 Publications Search
Thermal-chemical Alteration of Sandstone to Increase Permeability.
NTIS: PB 205 644 :22 pages
Liquid incendiaries were burned within the interstices of several different types of sandstone cores to determine the technical feasibility of increasing sandstone permeability by this method. Fuel-oxidant mixtures were tested in 186 cores; six cores exploded when ignited. In virtually all instances, the explosion completely pulverized the sandstone cores. In addition to those cores damaged by explosions, 24 cores were fractured so severely that permeability tests were impossible. Although combustion generally increased the permeability, specific mixtures at given pressures were inconsistent in their ignition and burning behavior. Tests indicated that the heat of burning incendiaries significantly increased sandstone permeability. The improved permeability ratios were usually less than 2, but one was 10.3. Permeability alteration by other in situ methods was not as effective as that by flame propagation.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 205 644
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division