all shapes of soils
angular
subangular
rounded
why do angular particles have better engineering properties
less voids
Previous
Play
Next
Rewind 10 seconds
Move forward 10 seconds
Unmute
0:02
/
0:15
Full screen
Brainpower
Read More
Clay particle properties
very fine ...
all shapes of soils - ANSWER- angular
subangular
rounded
why do angular particles have better engineering properties - ANSWER- less
voids
Clay particle properties - ANSWER- very fine and layered flat
attracts water the most
charges for clay - ANSWER- mineral surface negative charge
edges have positive charge
sieves are used for what kind of soil - ANSWER- coarse grained
what do classification tests determine - ANSWER- direct physical sizing of
material
and sedimentaion
sedimentation - ANSWER- process of settling
well graded - ANSWER- wide range of sizes
poorly graded - ANSWER- small range of sizes
what kind of soil is most suseptible to soil liquefaction - ANSWER- poorly graded
soil liquefaction - ANSWER- strength and stiffness reduced by high loads or
vibrations
fine grained based on sieve - ANSWER- more than 50% passes through 200#
seive
,Dry strength test - ANSWER- Mold sample into ball and let dry, break ball with
thumb and finger
dry strength test if ball doesnt break - ANSWER- highly plastic
dry strength test if ball breaks - ANSWER- not very plastic
plasticity index depends on what - ANSWER- amount of clay present
plastic index indication - ANSWER- fitness of the soil and its capacity to change
shape without altering volume
Clay properties vary in proportion to - ANSWER- water content
high water content in clay has ___________ Properties - ANSWER- liquid
Low water content and volume decrease in clay shows that it is - ANSWER-
plastic
Atterberg limits evaluate - ANSWER- plasticity
atterberg limits used when - ANSWER- for dams,
embankments,landfills,highways
atterberg limits determine - ANSWER- if building can be supported
Liquid Limit - ANSWER- soil water content expressed in % of dry unit weight
Liquid limit point - ANSWER- which soil will start to flow using the shake test
( more water content)
Plastic limit - ANSWER- moisture content % at soil begins to crumble ( less water
content)
Plastic index - ANSWER- numericle difference between liquid and plastic limits
plastic index represent - ANSWER- range in moisture content
In field devices - ANSWER- soil density devices
pocket penetrometer
, turvane
pocket penetrometer measures - ANSWER- tons per square foot
in place density or in place unit weight refers to what - ANSWER- volumetric
weight of soil in undisturbed condition or compacted fill in pounds per square
foot
IPD or IPUW only used for - ANSWER- coarse grained soils due to there being
such a difference in bank and compacted density and volume
The greater the density or unit weight the better the... - ANSWER- shear strength
and less tendancy for compression
borrow pit soils - ANSWER- an area to remove earth soils which will be used for
fill
use unut weight or density tests to estimate - ANSWER- volume of shrinkage or
swell that will occur as the soil is transported
collapsible soils have - ANSWER- volume reductions when in contact with water
collapsible gravel has what change - ANSWER- volume
saturated sand is - ANSWER- unstable
montmorillte minerals have high - ANSWER- volume changes
easy to absorb water where - ANSWER- between layers
expansive force can lift - ANSWER- pavements and structures
expansive force puts lateral forces and - ANSWER- pressure on walls
volume decrease occurs when there is - ANSWER- a decrease in water content
expansive swelling clays monitor - ANSWER- soil moisture and control
percentage around or beneath the structure
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller tuition. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
