問題一覧
1
why study soil and its properties?
-To Establish Safe and Economical structures -Environmental Impact
2
Natural Aggregate of Minerals
Rock
3
Unconsolidated Sediments
Soil
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Uncemented Aggregate of Mineral Grains
Soil
5
Study of Soil
Soil Mechanics
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Practical Application of Soil Mechanics
Soil Engineering
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Application of both soil and rock mechanics
Geotechnical Engineering
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Rock Cycle
Igneous Sedimentary Metamorphic
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Origin of Soil
Rocks
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Soil that stays on the Area
Residual Soil
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Soil that travels to different area
Transported Soil
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Transported Soil by Wind
Aeolian Soil
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what is Sand Dunes created by?
Sand
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What are Loess built by?
Silk
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Can gave cementation of silk
Loess
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Soil transported by gravity or by rolling down a slope
Colluvial Soil
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Transported by Glaciers
Glacial Tilt or Glacial Soil
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Soil transported in or by River Deposits
Alluvial Soil
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Soil transported by river that reaches the sea
Marine Clay
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If glaciers melt and creates a river that transport soil, what is it called?
Glaciofluvial or Stratified Drift
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What are Lake Deposits called?
Lacustrine Soil
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ASTM
American Society for Testing and Materials
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AASHTO
American Association of State Highway and Transportation Officials
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will pass 12-in(300mm) and be retained on a 3-in(75mm) sieve
Cobbles
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Will not pass a 12-in(300-mm) square opening
Boulders
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Will pass in 3-in(75mm) sieve but retain on no.4(4.75mm) sieve
Gravel
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passes in 3-in(75mm), retained at 3/4-in(19.05mm)
Coarse Gravel
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passes 3/4-in(19.05mm), retained in no.4(4.75mm)
Fine Gravel
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will pass no.4(4.75mm), but retain on No. 200(75-um)
Sand
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pass No.4(4.75mm), retain in No.10(2.00)
Coarse Sand
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pass No.10(2.00mm), retained in No.40(425um)
Medium Sand
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Pass No.40(425um), retained in No.200(75-um)
Fine Sand
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Pass No.200(75um)
Clay
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exhibit Plasticity
Clay
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Sufficient organic content to influence the soil properties
Organic Clay
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Non plastic
Silt
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A silt with sufficient organic content
Organic Silt
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A vegetable tissue; less favorable type of soil
Peat