capacities, measuring jar of 1000ml capacity.
The bulk density of an aggregate is used for judging its quality by comparison
with normal density for that type of aggregate. It is required for converting proportions
by weight into proportions by volume and is used in calculating the percentage of voices in
the aggregate.
1. Specific gravity is the weight of aggregate
relative to the weight of equal volume of water.
2. Void ratio is the ratio of volume of voids to the volume of
solids in an aggregate.
3. Percentage of voids or porosity is the ratio of volume of
voids to the total volume of a sample of an aggregate.
4. Bulk density or unit weight is the weight of material per
unit volume.
PROCEDURE
Coarse aggregate
1. Find the weight of the empty container W1.
2. Take coarse aggregate in the container up to approximately half of the
container and find out the weight W2.
3. Fill the container with water upto the level of the coarse aggregates so
that all void space inside the aggregate is filled with water. Find its weight W3.
4. Fill the container with water after emptying it from mix of coarse aggregate
and water.
5. Water should be upto the mark, upto which coarse aggregate is filled. Find
its weight W4
6. Repeat the same process for another trail by taking the aggregate upto the
full of the container and by filling the water up to same point.
OBSERVATIONS
|
S.No |
Trail 1
|
Trail 2 |
|
1) |
Weight
of empty container W1 |
|
|
2) |
Weight
of container with material W2 |
|
|
3) |
Weight
of container + material + water W3 |
|
|
4) |
Weight
of container + water W4 |
W3 - W1 / ((W4 - W1)-(W3-W2))
ii) Porosity = Vol. of Voids / Total Vol. of aggregate *100
W3 - W2 / (W4 - W1) * 100
iii) Specific gravity = W2 - W1 / ((W4 - W1) - (W3 - W2))
iv) Bulk density = W2 - W1 / (W4 - W1)
Fine aggregate- Void Ratio and porosity
1. Take 150 ml of dry sand (v1 ml) in clean measuring jar of 1000 ml capacity.
2. Add a measured quantity of 100 ml clean water to the above sample (v2 ml) i.e. v2=100 ml
3. Shake the jar thoroughly till all air bubbles are expelled.
4. Now note the readings against the top surface of water in the jar (V3 ml)
Void ratio = v1 + v2 - v3 / v3 - v2
Porosity = v1 + v2 - v3 / v1
Specific gravity of fine aggregates:
1. Weigh the empty measuring jar of 1000 ml capacity = W1
2. Take the weight of empty measuring jar with 150 ml of sand Empty jar + sand =W2
3. Take the weight of empty measuring jar with 150 ml of sand and 100 ml of water Empty jar + sand + water = W3
4. Remove the mix of sand and water from bottle and fill it with water up to volume V3 then weigh it.
Empty jar + water = W4
Specific gravity = Weight of solids / Volume of Solids
W2 - W1 / ((W4 - W1) - (W3 - W2))
1) Specific gravity of course aggregate____________.
2) Void ratio of course aggregate_________________.
3) Porosity of coarse aggregate__________________.
4) Bulk density of course aggregate______________.
5) Specific gravity of fine aggregate______________.
6) Void ratio of the given fine aggregate___________.
7) Porosity of the given time aggregate____________.
Initial and Final setting of Cement
Compressive strength of Cement Sample
Specific Gravity of fine aggregate
Grain Size distribution of fine aggregate
Grain Size distribution of coarse aggregate
Crushing Value of aggregate
Impact Value of aggregate
Compressive strength of Concrete Cube
Fineness of cement
Compressive strength of cement
Specific Gravity of cement
Soundness of cement
Fineness Modulus of fine and Coarse Aggregrate
Specific Gravity, Void ratio, porosityand Bulk density of fine and Coarse aggregrate
Bulking of Sand
Slump test-Workability test
Compaction factor test- Workability test
Flow table test- Workability test
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