详情

原文传递 Compression Strength of Frozen Gravel Materials from McMurdo Station, Antarctica.

题名：	Compression Strength of Frozen Gravel Materials from McMurdo Station, Antarctica.
作者：	Affleck, R. T.; Melendy, T.; Menke, A.; Bernier, A.; Smith, C.
关键词：	Failure mode and effect analysis, Material degradation processes, Materials laboratories, Concrete, Fabrication, Igneous rocks, Minerals, Particles, Regions, Strain rate, Compressive strength, Construction materials, Materials, Materials processing, Moisture content, Soils, Cold regions, Mechanical properties, Physical properties, Construction, Basalt, Epolar, Foundations--cold weather conditions, Frozen ground, Mcmurdo station (antarctica), Nsf, Reconstituted samples, Soil moisture, Soils--testing, Strength
摘要：	The plan to modernize McMurdo Station involves constructing large buildings for more efficient facilities and infrastructure. Foundation design for these large buildings will require understanding of the mechanical properties of the native soil. This study is the first that we are aware of to conduct uniaxial compression tests on materials from McMurdo Station in their frozen state. The testing used in this study emulates specific ground conditions measured on-site.Reconstituted specimens of well-graded gravel basalt were compacted at 4 and 20 by weight moisture contents and frozen at temperatures of 7C and 20C. Test results determined that higher moisture content combined with lower ambient temperatures resulted in increased strengths compared to optimum moisture and compaction testing results.If new building foundations will be in direct contact with the ground and allow heat transfer to take place, then the base material should be placed and compacted at the optimum moisture content. This will reduce the potential effects of thaw degradation under the foundation, especially on ice-rich ground.
报告类型：	科技报告