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BSCE 3B 1ST > SOIL MECH T1 > Flashcards

SOIL MECH T1 Flashcards

1
Q

In Geotechnical Engineering, this refers to a particle that
consists of three phase solid, liquid (water) and gas (air).

A

soil

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2
Q

soil refers to a particle that
consists of three phase solid, liquid (water) and gas (air).

A

geotechnical engineering

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3
Q

refers to a collection of solid particles, of varying sizes, with voids in between which may
contain water.

A

soil by civil engineers

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4
Q

soil is formed by different particles such as

A
  1. gravel
  2. rock
  3. sand
  4. silt
  5. clay
  6. loam
  7. humus
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5
Q

is the sub discipline of civil engineering that involves natural materials found close to the surface of the earth.

A

geotechnical engineering

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6
Q

defined as a natural aggregate of mineral grains, with or without organic constituents that can be separated by gentle mechanical means such as agitation in water.

A

soil

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7
Q

is considered to be a natural aggregate of mineral grains
connected by strong and permanent cohesive forces.

A

rock

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8
Q

are formed by the process of weathering of the parent rock.

A

soil

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9
Q

types of weathering

A
  1. mechanical weathering/mechanical disintegration
  2. chemical weathering/chemical decomposition
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10
Q

is due to the action of such agents as the expansive forces of
freezing water in fissures, due to sudden changes of temperature or due to the abrasion of rock by moving water or glaciers.

A

mechanical weathering

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11
Q

can transform hard rock minerals into soft, easily erodible matter.

A

Chemical weathering (decomposition)

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12
Q

Principle types of decomposition

A
  1. Hydration
  2. oxidation
  3. carbonation
  4. desilication
  5. leaching
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13
Q

Three basic types of soils

A
  1. sand
  2. silt
  3. clay
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14
Q

classification of soil according to grain size acc. to USCS

A
  1. gravel: 4.75 to 76.2 mm
  2. sand: less than 4.75 to 0.075 mm
  3. silt: 0.075 to 0.002 mm
  4. clay: finer than 0.002 mm
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15
Q

are mixtures in which a significant part of the solids is derived from the growth and decay of plant life and/or from the accumulation of skeletons or shells of small organisms.

A

organic soils

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16
Q

is a good example of an organic soil, consisting largely of decaying wood and other plant remains.

A

peat

17
Q

are formed as a result of the breaking down of rocks into smaller fragments.

A

inorganic soils

18
Q

purely mechanical process

A

physical weathering (disintegration)

19
Q

chemical alteration of the parent material

A

chemical decomposition

20
Q

is the material resulting from the in situ weathering of the parent rock.

A

residual soil

21
Q

Residual soils are distributed throughout many regions of the world, such as

A

Africa, South Asia, Australia, Southeastern North America, Central and South America, and considerable regions of Europe.

22
Q

are soils that are found at locations far removed from their place of formation.

A

transported soils

23
Q

the transporting agencies of soils

A

glaciers, wind, water

24
Q

transported by running water and deposited along streams and so-called alluvial plains

A

Alluvial Soils

25
Q

transported and deposited by wind. Examples: Sand dunes, air transported volcanic deposits, Loess.

A

Aeolian Soils

26
Q

formed by movement of soils from its original place by gravity, such as during landslides.

A

Colluvial Soils

27
Q

formed by deposition in quiet lakes.

A

Lacustrine Soils

28
Q

formed by transportation and deposition of glaciers.

A

Glacial Soils

29
Q

formed by deposition in the seas.

A

Marine Soils

30
Q

is generally understood to refer to a material composed of a mass of small mineral particles which, in association with certain quantities of water, exhibits the property of plasticity.

A

clay

31
Q

extremely small crystalline particles of one or more members of a small group of minerals

A

clay minerals

32
Q

Clay is divided into three general groups based on

A

Crystalline arrangement

BSCE 3B 1ST (12 decks)

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