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Influence of Nanosilica on the Freezing and Thawing Characteristics of Sand, Silt and Silty Clay

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This paper presents an experimental study aiming to understand the impacts of nanosilica on the freezing and thawing properties of soils. We use freezing and thawing processes to investigate the freezing point, supercooling temperature, thawing point and equilibrium freezing time of three types of soils (i.e., Delingha sand, Lanzhou silt and Beiluhe silty clay) under different nanosilica contents. The results show that the freezing point, supercooling temperature and melting point decrease with the increase of nanosilica content. The equilibrium freezing time decreases with increasing nanosilica content, however, the equilibrium freezing time remains constant when the nanosilica content exceeds 1.0%. In addition, SiO2 nanoparticles are able to act as nanofillers to recover the pore structure of the specimens by decreasing harmful pores. The research results could provide help for applications of nanomaterials in cold regions.
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Keywords: FREEZING AND THAWING; FREEZING POINT; MELTING POINT; NANOSILICA; SUPERCOOLING

Document Type: Short Communication

Publication date: July 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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