What is the purpose of doing CBR Test?
The Rockwell hardness of mild steel is 70 HRB.
The Rockwell hardness of mild steel is 70 HRB.
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What is the Rockwell hardness of mild steel and aluminum?
What is Kelly ball test for workability of concrete?
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Kelly ball test is simply a test used for measuring the workability of concrete. Test apparatus look like The Kelly ball test was formally standardized in ASTM C360-92: the name is “Standard Test Method for Ball Penetration in Freshly Mixed Hydraulic Cement Concrete.” Advantages: The test isRead more
Kelly ball test is simply a test used for measuring the workability of concrete.
Test apparatus look like
The Kelly ball test was formally standardized in ASTM C360-92: the name is “Standard Test Method for Ball Penetration in Freshly Mixed Hydraulic Cement Concrete.”
Advantages:
- The test is faster than the slump test.
I has been claimed that the Kelly ball test provides more accurate results than the slump
test.Disadvantages:
- Like the slump test, the Kelly ball test is a static test.
- The test must be performed on a level surface of concrete
- Largea aggregate can influence the results of kelly ball.
Is there any gradation limit for 6mm aggregate.
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you can refer to this article https://theconstructor.org/practical-guide/grading-limits-for-aggregates/2383/
you can refer to this article https://theconstructor.org/practical-guide/grading-limits-for-aggregates/2383/
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What soil tests are done to decide whether to lay pile foundation? We have a construction site beside the canal. So we thought of laying pile foundation and soil is also black cotton soil. We want to construct 3 storey building.to ...
What is the Type of penstock and nozzle used for Pelton turbine model
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Hi, During selecting a penstock, it's a crucial choice of the pipe diameter and the pressure permissible with the material. the material should be selected according to the pressure and the condition of the run also with local circumstances. HDPE- high-density polyethene pipes are a popular choice aRead more
Hi,
During selecting a penstock, it’s a crucial choice of the pipe diameter and the pressure permissible with the material. the material should be selected according to the pressure and the condition of the run also with local circumstances. HDPE- high-density polyethene pipes are a popular choice as a material for penstock. By using this material determine gives efficiency by up to 70%.
Nozzles must be designed in a way that the laws of pressure are as much as small as possible so that the coefficient of nozzle increases. To avoid the friction nozzle should be constructed with a possible largest radius.
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Jinny Healthy Girl
User
How to determine the specific gravity of chemicals using Pycnometer? Can the pycnometer test for specific gravity done without a Vaccum pump?
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Steps PROCEDURE Clean and dry the density bottle wash the bottle with water and allow it to drain. Wash it with alcohol and drain it to remove water. Wash it with ether, to remove alcohol and drain ether. Weigh the empty bottle with stopper (W1) Take about 10 to 20 gm of oven soil sample which is cRead more
Steps
PROCEDURE
- Clean and dry the density bottle
- wash the bottle with water and allow it to drain.
- Wash it with alcohol and drain it to remove water.
- Wash it with ether, to remove alcohol and drain ether.
- Weigh the empty bottle with stopper (W1)
- Take about 10 to 20 gm of oven soil sample which is cooled in a desiccator. Transfer it to the bottle. Find the weight of the bottle and soil (W2).
- Put 10ml of distilled water in the bottle to allow the soil to soak completely. Leave it for about 2 hours.
- Again fill the bottle completely with distilled water put the stopper and keep the bottle
under constant temperature water baths (Tx0 ).
- Take the bottle outside and wipe it clean and dry note. Now determine the weight of the bottle and the contents(W3).
- Now empty the bottle and thoroughly clean it. Fill the bottle with only disttiled water and weigh it. Let it be W4at temperature (Tx0C).
- Repeat the same process for 2 to 3 times, to take the average reading of it.
OBSERVATIONS
S. No. Observation Number 1 2 3 1 2
3
4
Weight of density bottle (W1 g) Weight of density bottle + dry soil (W2 g)
Weight of bottle + dry soil + water at temperature T x0 C (W3 g)
Weight of bottle + water (W4 g) at temperature Tx0 C
Specific gravity G at Tx0 C Average specific gravity at Tx0C INTERPRETATION AND REPORTING
Unless or otherwise specified specific gravity values reported shall be based on water at 270C. So the specific gravity at 270C = K�Sp. gravity at Tx0C.
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How to conduct a soundness tests on cement?
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The cement considers unsound if it undergoes a large change in volume (expansion) that causes cracking of hardened cement paste when it is under the condition of restraint. Apparatus Required: Le-Chateliers Apparatus, Water bath, Vernier Caliper, Weighing Scale. Procedure : 1. Place the lightly oileRead more
The cement considers unsound if it undergoes a large change in volume (expansion) that causes cracking of hardened cement paste when it is under the condition of restraint.
Apparatus Required: Le-Chateliers Apparatus, Water bath, Vernier Caliper, Weighing Scale.
Procedure :
1. Place the lightly oiled mold on a lightly oiled glass sheet and fill it with cement paste formed by gauging cement with 0.78 times the water required to give a paste of standard consistency.
2. Cover the mold with another piece of lightly oiled glass sheet, place a small weight on this covering glass sheet and immediately submerge the whole assembly in water at a temperature of 27 ± 2°C and keep there for 24 hours.
3. Measure the distance separating the indicator points to the nearest 0.5 mm. Submerge the mold again in water at the temperature prescribed above.
4. Bring the water to boiling, with the mold kept submerged, in 25 to 30 minutes, and keep it boiling for three hours. Remove the mold from the water, allow it to cool, and measure the distance between the indicator points.
5. The difference between these two measurements indicates the expansion of the cement. This must not exceed 10 mm for ordinary, rapid hardening, and low heat Portland cements. If in case the expansion is more than 10 mm as tested above, the cement is said to be unsound.
Observation And Recording:
Soundness/expansion of cement = L1-L2
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L1=Measurement taken after 24 hours of immersion in water at a temp. of 27 ± 20C
L2=Measurement taken after 3 hours of immersion in water at boiling temperature.
Calculate the mean of two values to the nearest 0.5 mm.
Komal Bhandakkar
Purpose of California bearing ratio test: The main purpose of the California bearing ratio test is the measurement of a soil resistance penetration before reaching its highest ultimate value of a shearing Basically, 2 California bearing ratio value is designed as a ratio in % of range 0 to 100. TheRead more
Purpose of California bearing ratio test:
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