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The water content of a soil sample is found to be 35%. If the percentage of air voids present in the soil sample is 5%. Then compute dry unit weight and air content of the soil sample when the void ratio of the soil sample is 0.65.
Take specific gravity of soil solids and unit weight of water to be 2.70 and 10 kN/m3.
  • a)
    22.09 kN/m3 and 5%
  • b)
    13.19 kN/m3 and 12.70%
  • c)
    13.19 kN/m3 and 20%
  • d)
    22.09 kN/m3 and 10%
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The water content of a soil sample is found to be 35%. If the percenta...
Dry unit weight is given by

ηa = 0.05
G = 2.70
ω = 0.35
ηd = 13.19 kN/m3
ηa = acη
η → porosity
ac → aircontent

ac = 0.1269
ac = 12.70%
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Most Upvoted Answer
The water content of a soil sample is found to be 35%. If the percenta...
To solve this question, we need to use the relationships between the water content, void ratio, and dry unit weight of the soil sample.

Given data:
Water content (w) = 35%
Air voids (Va) = 5%
Void ratio (e) = 0.65
Specific gravity of soil solids (G) = 2.70
Unit weight of water (γw) = 10 kN/m3

We can start by calculating the dry unit weight (γd) of the soil sample using the following formula:

γd = (1 + e) * γw

Calculating the dry unit weight:
γd = (1 + 0.65) * 10
γd = 1.65 * 10
γd = 16.5 kN/m3

Next, we need to calculate the air content (Va/V) of the soil sample using the formula:

Va/V = (Va / (1 + w)) * (1/G)

Calculating the air content:
Va/V = (5 / (1 + 0.35)) * (1/2.70)
Va/V = (5 / 1.35) * (1/2.70)
Va/V = 3.70%

Comparing the calculated values with the given options, we find that option 'B' (13.19 kN/m3 and 12.70%) matches the calculated values.

Therefore, the correct answer is option 'B' (13.19 kN/m3 and 12.70%).
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The water content of a soil sample is found to be 35%. If the percentage of air voids present in the soil sample is 5%. Then compute dry unit weight and air content of the soil sample when the void ratio of the soil sample is 0.65.Take specific gravity of soil solids and unit weight of water to be 2.70 and 10 kN/m3.a)22.09 kN/m3and 5%b)13.19 kN/m3and 12.70%c)13.19 kN/m3and 20%d)22.09 kN/m3and 10%Correct answer is option 'B'. Can you explain this answer?
Question Description
The water content of a soil sample is found to be 35%. If the percentage of air voids present in the soil sample is 5%. Then compute dry unit weight and air content of the soil sample when the void ratio of the soil sample is 0.65.Take specific gravity of soil solids and unit weight of water to be 2.70 and 10 kN/m3.a)22.09 kN/m3and 5%b)13.19 kN/m3and 12.70%c)13.19 kN/m3and 20%d)22.09 kN/m3and 10%Correct answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about The water content of a soil sample is found to be 35%. If the percentage of air voids present in the soil sample is 5%. Then compute dry unit weight and air content of the soil sample when the void ratio of the soil sample is 0.65.Take specific gravity of soil solids and unit weight of water to be 2.70 and 10 kN/m3.a)22.09 kN/m3and 5%b)13.19 kN/m3and 12.70%c)13.19 kN/m3and 20%d)22.09 kN/m3and 10%Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The water content of a soil sample is found to be 35%. If the percentage of air voids present in the soil sample is 5%. Then compute dry unit weight and air content of the soil sample when the void ratio of the soil sample is 0.65.Take specific gravity of soil solids and unit weight of water to be 2.70 and 10 kN/m3.a)22.09 kN/m3and 5%b)13.19 kN/m3and 12.70%c)13.19 kN/m3and 20%d)22.09 kN/m3and 10%Correct answer is option 'B'. Can you explain this answer?.
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