# GATE Questions & Answers of Highway materials - desirable properties and quality control tests

## What is the Weightage of Highway materials - desirable properties and quality control tests in GATE Exam?

Total 7 Questions have been asked from Highway materials - desirable properties and quality control tests topic of Highway Pavements subject in previous GATE papers. Average marks 1.43.

A bitumen sample has been graded as VG30 as per IS : 73-2013. The ‘30’ in the grade means that

The initial concavity in the load-penetration curve of a CBR test is NOT due to

The following observations are made while testing aggregate for its sutability in pavement construction:

i. Mass of oven-dry aggregate in air $=1000\;g$

ii. Mass of saturated surface-dry agreegate in air $=1025\;g$

iii. Mass of saturated surface-dry aggregate under water $=625\;g$

Based on the above observations the correct statement is

During a forensic investigation of pavement failure, an engineer reconstructed the graphs P, Q, R and S, using partial and damaged old reports.

Theoretically plausible correct graphs according to the 'Marshall mixture design output' are

The penetration value of bitumen sample tested at 25oC is 80. When this sample is heated to 60oC and tested again, the needle of the penetration test apparatus penetrates the bitumen sample by d mm. The value of d CANNOT be less than _____ mm.

Match the information related to tests on aggregates given in Group-I with that in Group-II

 Group-I Group-II P. Resistance to impact 1. Hardness Q. Resistance to wear 2. Strength R. Resistance to weathering action 3. Toughness S. Resistance to crushing 4. Soundness