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What is the swell factor for mining sand and gravel?
The swell factor of materials such as sand and gravel is a variable which is dependent upon the type and compaction of the undisturbed (bank run) material. Generally speaking swell for sand and gravel can range from 12% to 40%. The variability in swell is affected by moisture, clay and other mineral content. Clean, dry sand and gravel tends towards the 12% end with an average of around 17%. Swell increases to the right as the material tested becomes "dirtier". Bank cubic yard (BCY) is converted to loose cubic yard (LCY) by multiplying the BCY x swell factor + BCY. Swell of a given deposit can be approximated by the use of several calibrated buckets. Carefully excavate a volume of bank run material and place it directly into calibrated buckets of a known volume. (Note: a five gallon bucket in not a five gallon bucket, you need to actually calculate the volume.) Before moving the filled or partially filled buckets, measure the depth from the rim top to the average top of material and also weigh each bucket. Carefully record the numbers for each bucket. Next, carefully measure and calculate the volume of the hole from which the material was removed. The volume of material in the buckets (loose) will be larger than the volume removed from the hole (bank). The difference reflects the amount of swell for that particular deposit.
Can hydropower be renewed?
Electricity generated for dams is renewable because the Sun does the heavy lifting of evaporating the water from seas and lakes so it can fall back to the ground as rain and swell rivers again. Tidal dams use the gravity of the Moon, which is constant.
What is claycrete?
In road engineering, a clay substrate can cause problems with its propensity to swell when moist, and its plasticity. Clay particles may be bound to 'burnt lime' CaO, and this is often used as a soil stabilizer. This mixture is much more stable. There may well be companies that have trademarked the name.
What is importance of soil as construction material?
Clay mineralogy should be considered for structures built on or backfilled with clayey soils. Smectite clays such as montmorillonite (2:1 clays) have a high shrink-swell potential. When wet, 2:1 clays can cause serious structural foundation problems. Kaolinitic clays are less of a concern.
Why is glacial till unsuitable for building?
Glacial till is in fact very commonly used in building. It is over consolidated and so is very stiff making it a very good founding material as there is very little settlement. This also means that it has a very high shear strength by the standards of soils so can be used to form very stable embankments and cuttings. There can however be practical problems with the use of glacial tills as there may be large cobble and boulder sized clasts within the clay matrix which can make excavation of cuttings difficult and also hamper the driving of piles for deep foundations. Also some clays (which may be present in glacial till) are more "active" than others. Activity in this context is a term used to describe their shrink swell potential, as some clays undergo significant volume changes depending on their moisture content. This can cause cyclical shrinking and swelling of the clay / glacial till depending on seasonal variations in rainfall and temperatures. In embankments and cuttings, this deformation leads to a strain softening behaviour which can ultimately result in the formation of a slip surface causing a failure in slopes. In founding materials composed of glacial till, this behaviour can lead to differential settlements that can cause damage to structures and underground services.
Why right wrist and hand rigidity?
Carpel tunnel syndrome causes a wrist and hand to be stiff and sore. Tendonitis of the wrist, sprains, and arthritis can also cause a hand and wrist to swell, be sore, and stiff.
What causes left shoulder to swell?
what causes the left shoulder to swell
What is testicular hypofunction?
Testicular hypofunction is a disorder which makes the left side of the testicles swell. It causes an abnormal failure of the testes when it goes unchecked.
What solution that causes a cell to swell cause of osmosis?
Solution causes a cell to swell by osmosis
What can cause blood passages to swell?
Infections causes it to swell
What childhood disease causes the salivary glands in the jaw to swell dramatically?
Mumps causes salivary glands to swell dramatically.
What causes the Pericadium to to Swell?
maybe a cyst
What causes your limp nodes to swell?
How should I no!
What causes the tonsils to swell and get hard?
Tonsillitis
What disease causes bronchial tubes to swell?
asthma
What is the disease that may cause joints to swell or stiffen?
Arthritis which comes in various forms.
Is there any form of arthritis that causes lymph glands to swell?
No
