Pore characteristics and their evolution in clays using small angle neutron scattering

M. Ding, M. Hartl, H. Xu, R. P. Hjelm, Andrew W Miller, Y. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The pore characteristics and fluid transport behavior from the nano-to micrometer scale of clays at field conditions provide fundamental insights into their performance efficiency as barrier material and their role in regulating radionuclide transport in nuclear waste repositories. Small angle scattering is the canonical technique to be used when probing the inner structure of disordered systems in the 1 to 1000 nm range. In this study, we have characterized the pore features of synthetic and naturally occurring clays including illite, palygorskite, smectite, and WY bentonite using small-angle neutron scattering (SANS), and their evolution over the relevant ranges of humidity, temperature, pressure, composition, and length scale. Our results demonstrate that each clay shows unique pore features. The effects that impact on pore features include sample form and sample environment including humidity, temperature, and pressure. Analysis of the SANS data indicates significant alteration of clays on water absorption. These results suggest that SANS is particularly suited for in-situ studies of pore-scale characteristics of geological materials and the factors that impact their pore features. As emergent property, nano-to micro-scale structural characterization is crucial in providing insights into pore-scale processes, which are pertinent to upscale continuum model development for field applications.

Original languageEnglish (US)
Title of host publication14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013
Subtitle of host publicationIntegrating Storage, Transportation, and Disposal
Pages241-246
Number of pages6
StatePublished - Oct 25 2013
Event14th International High-Level Radioactive Waste Management Conference: Integrating Storage, Transportation, and Disposal, IHLRWMC 2013 - Albuquerque, NM, United States
Duration: Apr 28 2013May 2 2013

Publication series

Name14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal
Volume1

Other

Other14th International High-Level Radioactive Waste Management Conference: Integrating Storage, Transportation, and Disposal, IHLRWMC 2013
CountryUnited States
CityAlbuquerque, NM
Period4/28/135/2/13

Fingerprint

neutron scattering
clay
humidity
palygorskite
bentonite
repository
illite
smectite
radioactive waste
radionuclide
temperature
scattering
fluid
water
material

ASJC Scopus subject areas

  • Waste Management and Disposal

Cite this

Ding, M., Hartl, M., Xu, H., Hjelm, R. P., Miller, A. W., & Wang, Y. (2013). Pore characteristics and their evolution in clays using small angle neutron scattering. In 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal (pp. 241-246). (14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal; Vol. 1).

Pore characteristics and their evolution in clays using small angle neutron scattering. / Ding, M.; Hartl, M.; Xu, H.; Hjelm, R. P.; Miller, Andrew W; Wang, Y.

14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal. 2013. p. 241-246 (14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal; Vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ding, M, Hartl, M, Xu, H, Hjelm, RP, Miller, AW & Wang, Y 2013, Pore characteristics and their evolution in clays using small angle neutron scattering. in 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal. 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal, vol. 1, pp. 241-246, 14th International High-Level Radioactive Waste Management Conference: Integrating Storage, Transportation, and Disposal, IHLRWMC 2013, Albuquerque, NM, United States, 4/28/13.
Ding M, Hartl M, Xu H, Hjelm RP, Miller AW, Wang Y. Pore characteristics and their evolution in clays using small angle neutron scattering. In 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal. 2013. p. 241-246. (14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal).
Ding, M. ; Hartl, M. ; Xu, H. ; Hjelm, R. P. ; Miller, Andrew W ; Wang, Y. / Pore characteristics and their evolution in clays using small angle neutron scattering. 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal. 2013. pp. 241-246 (14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal).
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