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http://dx.doi.org/10.22807/KJMP.2022.35.3.299

Analysis of Rock Surface Roughness and Chemical Species Generation by Freeze-Thaw Experiments  

Choi, Junghae (Kyungpook National University, Department of Earth Science Education)
Publication Information
Korean Journal of Mineralogy and Petrology / v.35, no.3, 2022 , pp. 299-311 More about this Journal
Abstract
Rocks exposed to the surface are subject to long-term weathering, and such effects weaken their engineering stability. Especially as weathering progresses, the surface of rocks will be changed by weathering, and such surface changes will affect the engineering safety of the rock mass. In addition, the chemical species produced in the weathered rock have a direct effect on the surrounding environment or on the structure. In areas where rocks are exposed, such as mining areas, chemical species produced by weathering can have a serious impact on the surrounding natural environment. In this study, accelerated weathering experiments using freeze/thaw system were conducted on rocks that had already been weathered and fresh rocks, and surface changes of each rock were observed with confocal laser scanning microscope (CLSM), and chemical species were analyzed using IC/ICP-MS. As the weathering progressed, the surface roughness decreased, and the amount of chemical species produced increased. The results of this study can be used as basic data for evaluating engineering/environmental safety in areas where rocks are exposed.
Keywords
Freeze/thaw experiment; Accelerated weathering expreiment; Surface roughness; Chemical species; Confocal laser scanning microscope (CLSM);
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