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Highway Engineering and Asphalt Properties

12 Questions

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Highway Engineering and Asphalt Properties

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Questions and Answers

What happens to the flow value as the asphalt content increases?

It remains constant

It decreases monotonically

It decreases and then increases

It increases and then decreases (correct)

What is the minimum ductility value of asphalt type (40-50) as per the Iraqi standard?

100 cm (correct)

120 cm

90 cm

80 cm

What is the purpose of the CBR test?

To determine the flow value of asphalt

To determine the ductility of asphalt

To determine the strength of subgrade (correct)

To determine the porosity of aggregate

What is the flash point temperature of paving grades of asphalt as per the Iraqi standard?

232°C Signup and view all the answers

What is the maximum wear value of aggregate to be used in asphalt pavement as per the Iraqi standard?

Not specified in the Iraqi standard Signup and view all the answers

What is the purpose of the penetration test?

To determine the grade of asphalt cement Signup and view all the answers

What is the standard load applied to the sample when the needle is immersed in the penetration test at 40°C?

200 gm Signup and view all the answers

What is the temperature of the oven in the loss on heating test?

163°C Signup and view all the answers

What is the percentage of degradation for a sample of coarse aggregate if the aggregate weight after testing and sieving is 3160 gm?

36.8% Signup and view all the answers

Which of the following grades of bitumen is harder?

30/40 Signup and view all the answers

What is the temperature of the aggregates used for mixing in hot mix type bituminous construction?

106°C Signup and view all the answers

What is the sieve size that coarse aggregate is mainly retained on?

No. 4 Signup and view all the answers