The filler material should have 85 to 100 percent passing from 0.075mm sieve, n only it can be used in highway and express way.

The temperature in Marshall?s design is taken as 60 for bitumen mix design purposes.

The softening point of bitumen may be between 35 and 70 in most of cases, so here 35 is most appropriate.

The waste material mostly used in pavement is fly ash which is mostly obtained from rmal power plants.

Tar is a byproduct of wood, both tar and bitumen look similar and used for pavement.

The volume of water in soundness test is 0.78p, where p is consistency of cement sample.

The aggregates which gives more ease of working and workability is round aggregate, flaky and angular also used in some cases, irregular also are used in pavements.

The slope of curve obtained between number of blows and water content in cassagrande?s method is called as flow index.

The skid number for highways should not be less than 55 for national highways to ensure smooth ride, if it is less than 55 n suitable precautions have to be taken.

If void ratio is high n, permeability of soil will be very high, for example gravel in which re is a lot of void ratio so permeability is very high.