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As per IS 2131 - 1981, the drive weight used in standard penetration test (SPT) is ______ KG
- a)50
- b)63.5
- c)42.5
- d)75
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
As per IS 2131 - 1981, the drive weight used in standard penetration t...
SPT test can be conducted to determine:
a) Relative Density of sands
b) Angle of internal friction
c) Unconfined compressive strength of clays
d) Ultimate bearing capacity on the basis of shear criteria
e) Allowable bearing pressure on the basis of settlement criteria
In this test, the split spoon sampler is driven by dynamic mechanism of hammer. This test is conducted either at every 2 to 5 meter interval or at the change of stratum.
Note:
The weight of the hammer is 63.5 kg.
The height of free fall is 750 mm or 75 cm.
The inner and outer diameter of the sampler is 35 mm and 50.5 mm respectively.
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As per IS 2131 - 1981, the drive weight used in standard penetration t...
IS 2131 - 1981: Standard Penetration Test (SPT)
Introduction:
The Standard Penetration Test (SPT) is a widely used in-situ test method to determine the geotechnical properties of soils. It is commonly performed in the field to obtain information about the soil's resistance to penetration and its density. IS 2131 - 1981 is the Indian Standard code that specifies the procedure for conducting the Standard Penetration Test.
Drive Weight in SPT:
The drive weight used in the Standard Penetration Test (SPT) is an important component of the testing apparatus. It is used to drive the split-spoon sampler into the ground and measure the resistance encountered during penetration. The weight of the drive weight affects the energy delivered to the sampler and can influence the test results.
Weight as per IS 2131 - 1981:
According to IS 2131 - 1981, the drive weight used in the Standard Penetration Test (SPT) is 63.5 kg. This weight is specified in the Indian Standard code to ensure consistency and accuracy in the testing procedure.
Justification:
The drive weight of 63.5 kg is selected based on several factors, including the desired energy level for penetration and the standardization of testing procedures. This weight has been found to provide reliable and consistent results in a wide range of soil conditions.
Other Options:
Let's analyze the other options given in the question:
- Option 'A' (50 kg): This weight is not specified in IS 2131 - 1981.
- Option 'C' (42.5 kg): This weight is not specified in IS 2131 - 1981.
- Option 'D' (75 kg): This weight is not specified in IS 2131 - 1981.
Conclusion:
In conclusion, as per IS 2131 - 1981, the drive weight used in the Standard Penetration Test (SPT) is 63.5 kg. This weight is specified in the Indian Standard code to ensure consistency and accuracy in the testing procedure. Other weights mentioned in the options are not specified in the standard.
Introduction:
The Standard Penetration Test (SPT) is a widely used in-situ test method to determine the geotechnical properties of soils. It is commonly performed in the field to obtain information about the soil's resistance to penetration and its density. IS 2131 - 1981 is the Indian Standard code that specifies the procedure for conducting the Standard Penetration Test.
Drive Weight in SPT:
The drive weight used in the Standard Penetration Test (SPT) is an important component of the testing apparatus. It is used to drive the split-spoon sampler into the ground and measure the resistance encountered during penetration. The weight of the drive weight affects the energy delivered to the sampler and can influence the test results.
Weight as per IS 2131 - 1981:
According to IS 2131 - 1981, the drive weight used in the Standard Penetration Test (SPT) is 63.5 kg. This weight is specified in the Indian Standard code to ensure consistency and accuracy in the testing procedure.
Justification:
The drive weight of 63.5 kg is selected based on several factors, including the desired energy level for penetration and the standardization of testing procedures. This weight has been found to provide reliable and consistent results in a wide range of soil conditions.
Other Options:
Let's analyze the other options given in the question:
- Option 'A' (50 kg): This weight is not specified in IS 2131 - 1981.
- Option 'C' (42.5 kg): This weight is not specified in IS 2131 - 1981.
- Option 'D' (75 kg): This weight is not specified in IS 2131 - 1981.
Conclusion:
In conclusion, as per IS 2131 - 1981, the drive weight used in the Standard Penetration Test (SPT) is 63.5 kg. This weight is specified in the Indian Standard code to ensure consistency and accuracy in the testing procedure. Other weights mentioned in the options are not specified in the standard.
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