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Title: Heating-freezing effects on the orientation of kaolin clay particles

Journal Article · · Applied Clay Science
 [1];  [2];  [3];  [1];  [3];  [4];  [3]
  1. Stony Brook Univ., NY (United States). Department of Civil Engineering
  2. Stony Brook Univ., NY (United States). Department of Material Science and Engineering
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Nuclear Science and Technology Department
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

The effects of temperature changes on the particle orientation of a consolidated kaolin are studied using XRD experiments. Here, two sets of equipment were utilized in this study: a benchtop equipment, and a synchrotron beamline at the National Synchrotron Light Source II (NSLS-II) at Brookhaven National Laboratory. The kaolin specimens tested in the benchtop XRD were subjected to elevated and freezing temperatures ex-situ, while those used for the NSLS-II experiment were exposed to the temperature changes in-situ. The temperatures considered in this study range from freezing (-10 °C) to elevated temperature below boiling (90 °C). The thermally-induced reorientation of clay mineral particles is highly dependent on the relative orientation of the clay mineral particles with respect to the applied thermal gradient. For example, kaolin samples with kaolinite particles oriented perpendicular to the thermal gradient, and to the expected thermally-induced pore water flow, experience much higher particles reorientations compared to samples with particles initially oriented parallel to the thermal gradient. Lastly, freezing kaolin preserved its microstructure as ice crystals form.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
US Army Research Laboratory (USARL); US Army Research Office (ARO); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0012704
OSTI ID:
1426470
Report Number(s):
BNL--203339-2018-JAAM; BNL--221099-2021-JAAM
Journal Information:
Applied Clay Science, Journal Name: Applied Clay Science Journal Issue: C Vol. 150; ISSN 0169-1317
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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