Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1019p&link_type=abstract
Lunar and Planetary Science, volume 27, page 1019
Other
Adsorption, Geotechnical Engineering, Regoliths: Lunar, Soil: Lunar, Surfaces: Cleanliness
Scientific paper
An understanding of the mechanical properties of lunar regolith is necessary to perform the geotechnical design of a lunar base. This design may include foundation systems, regolith shielding, mining excavations, erosion of launch pad areas, and soil anchors for communications towers. Particle angularity, size distribution, porosity and other common geotechnical engineering parameters control the mechanical properties of all granular materials. Another important parameter affecting the mechanical properties of lunar regolith is surface cleanliness. The latter is a measure of the quantity of gas molecules adsorbed to a material surface. In order to assess the effects of surface cleanliness on the mechanical properties of lunar regolith and simulants, the thermodynamics of adsorption, physical chemistry of surfaces, and mechanics of granular materials must be taken into consideration. The dependence of surface cleanliness on various environmental factors was investigated. An analysis of the effects of surface cleanliness on the mechanical property of shear strength was conducted. Results of this analysis compare closely with data from previous tests on simulants and actual regolith samples. The role of surface cleanliness in the geotechnical design of a lunar base is discussed.
Nelson Jack D.
Perko Howard A.
Sadeh Willy Z.
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