Page 6 - RoadCem in Road Construction & Rehabilitation[23318].pdf
P. 6
road construction & reconstruction with roadcem
To understand the way RoadCem works we have to take a look at the repetitive loads which are typical for roads
when in use; assuming we have a cyclic dynamic loading which is acting through the asphalt to the road base.
The force “F” is acting only at one point, under the tyre of the vehicle which is moving along the road.
If we look at one segment of this road, then for this segment an alternating stress occurs. The segment
is deflected under the force “F”, but when the force has passed the force on the segment is relieved and
the deflection returns to where it was. Then this section is loaded again, relieved, loaded and so on in a
continuous cyclic process.
Unfortunately, a normal road base is not able to stand this cyclic loading over long periods of time. If a
load is too high, then the elastic limit of the base is exceeded meaning it will no longer spring back to its
original position. When this happens we end up with a plastic deformation of the surface typically
resulting in rutting or other types of deformation.
