GATE CE 2025 Set 1 — Question 65
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Transportation Engineering → Bitumen & Mix Design → Bituminous Paving Mixes
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Question
During determination of the bulk specific gravity of compacted bituminous specimen, the mass in air of the specimen is 1260 g and volume is 525 . The density of water is 1.0 . The theoretical maximum specific gravity of mix is 2.510.The percentage air voids in the compacted specimen is ____________________ (rounded off to 2 decimal places).
Correct answer
4.22 to 4.56
Solution
To find the percentage of air voids in the compacted bituminous specimen, we follow these steps:
Rounding to two decimal places, the percentage air voids is 4.38%.
1.Calculate the Bulk Specific Gravity ():
The bulk specific gravity is the ratio of the mass of the specimen in air to its bulk volume (including voids) relative to the density of water.2.Identify the Theoretical Maximum Specific Gravity ():
Given, .3.Calculate the Percentage Air Voids ():
The percentage of air voids is the volume of air as a percentage of the total bulk volume of the mix.Rounding to two decimal places, the percentage air voids is 4.38%.
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