Asphalt overlays need protection from the shortcomings of the surface upon which they are laid.  All too often the life of the new asphalt is greatly reduced by cracks propagated from the joints or faults in the underlying surface.  This then allows water and salts, etc. to penetrate and the rapid deterioration of the surface asphalt begins.

It is becoming increasingly common for an anti-crack membrane to be installed before the laying of new asphalt to reduce this problem.

APPLICATION

Whether it is asphalt or concrete the crack or joint and the surrounding surface must be thoroughly cleaned and dried using hot compressed air immediately prior to the application of the SAMI.

The Fibrescreed compound, which has been pre-heated to the pouring temperature of between 350-390ºF in a purpose-built horizontally agitated mixer, is applied through a screed box to fill the voids in the cracks and joints and form the membrane in one operation.

Finally, a dressing of hot high PSV aggregate is applied.  Any surplus aggregate is then removed.

[back to top]