Page 10 - Structural Highway Design_Neat
P. 10
5.4. Temperature
HMA temperature has a direct effect on the viscosity of the asphalt cement binder
and thus compaction. As HMA temperature decreases, its asphalt cement binder
becomes more viscous and resistant to deformation, which results in a smaller
reduction in air voids for a given compactive effort.
5.5. Compaction Equipment
There are three basic pieces of equipment available for HMA compaction:
1. the paver screed,
2. the steel wheeled roller and
3. the pneumatic tire roller.
5.5.1. Steel Wheel Rollers
Steel wheel rollers are self-propelled compaction devices that use steel drums to
compress the underlying HMA.
10
