Answer only
18.
Stone mastic and open graded asphalt are used where reduced tyre noise is required.
Group of answer choices
True
False
20.
Open graded asphalt has lower air voids content than dense graded asphalt.
Group of answer choices
True
False
22.
Compaction is a process where the soil particles are rearranged over a few days to reduce the air voids.
Group of answer choices
True
False
23.
Test rolling is done to determine the number of passes required to achieve the desired level of compaction.
Group of answer choices
True
False