What is the national average of the percent RAP by weight us

What is the national average of the percent RAP (by weight) used in asphalt mix? and what are the major benefits state DOTs gained from using RAP in their roadway construction?

Solution

(1) Answer:- National average percentage use RAP in asphalt mix is 25% .

(2) Answer:- Benefits of RAP:-

(i) The use of RAP in roadway construction fits with global objective of sustainable development by the prudent use of natural resources.

(ii) Faster project completion and reduction in construction related traffic.

(iii) Less disruption to travelling people

(iv) Reduction of construction waste.

(v) Preservation of nonrenewable natural resources and lower energy cost.

(vi) RAP has economic ,social and environmental benefit.