RHiNOPHALT® is the only BBA HAPAS and CE Marked cold spray-applied surface penetrative preservation sealer.

It penetrates just far enough into the asphalt mortar at the surface to provide a key, giving a durable seal to prevent water ingress and to dramatically slow down further oxidization due to weathering and UV degradation.

It preserves the condition of the asphalt binder at the point of treatment and provides improved cohesion and binding properties with the aggregate matrix.

The solution is best utilised as a preventative maintenance measure as part of a long term asset management strategy, extending the operational life of the pavement and delaying the large costs of resurfacing and repair works.

RHiNOPHALT® Preservation


RHiNOPHALT® can be applied at night which works well with current maintenance programming, and the quick curing time means that the white lines and other markings can be applied in the same closure window.

Application is by a tanker in a single pass operation, treating up to 20,000 - 30,000m2 in a single shift. Surface texture is maintained and grip is restored by fine grit/dust application or sweeping.

Areas of Application

Treating new asphalt surfaces will preserve the bituminous binder properties for much longer, delaying the next maintenance intervention. Surfaces considered to be at ‘end of life’ can also be treated, provided they are in sound condition, to arrest the onset of ravelling due to embrittlement of the binder.

  • All categories of roads
  • Civil & Military airfields
  • Car parks
  • Test tracks and race tracks

Performance Testing

It has been reported that once installed, a 40/60 Pen bitumen will drop to around the 30 – 37 Pen range due to the immediate hardening effect of the high temperature required in the asphalt mixing process. Further oxidisation will see this value reduce over time.

Experience shows that more open graded materials such as SMA oxidise down to a penetration of below 15 Pen over approximately nine years. Once the binder falls below 15 Pen the embrittlement is such that it can no longer flex and hold the matrix together.

The table below shows results from SMA installed in 2002, which had a section treated in 2005 and a second application in 2010. This provided us with 3 sections: Control (untreated original condition as laid in 2002);1 Treatment (2005); and 2 Treatments (2005 & 2010). Cores were obtained in 2011 when the surface course was 9 years old.

The SMA exhibited more consistent recovered penetration values throughout the full depth of the surface course, typical for aged hardened 40/60 penetration grade bitumen in service for 10 years under UK conditions. The treated sections are showing sustained and better rheological properties than the sections which were not treated.

Most contracts have an untreated section used as a ‘control’ to compare to the treated sections, either visually or by laboratory testing:

  • Recovered binder penetration and softening point
  • Vialit Cohesion
  • Modified scuffing test (TRL) Report 176 Appendix G @ 60oC
  • Surface Texture
  • Hydraulic Conductivity

Cores extracted from M4 J10-11 trial section. 18 month old TSCS treated in July 2014.

Surface texture on the Untreated (Control) section was recorded at 2.6mm and the Treated section was 1.9mm.

This increase in texture is due to the surface aggregate loss occurring in the material.

The aggregate retention under stress loading can be measured using the TRL Scuffing Test.

The Scuffing Test was originally developed to measure the effectiveness of High Friction Surfacing, but it is also a good measure of surface durability when assessing ravelling under severe traffic conditions. Cores extracted have been assessed through the Scuffing Test process as outlined in the Transport Research Laboratory (TRL) Report 176 Appendix G, results are illustrated below:

The percentage values are based on a sample weight of around 3kg, although the test is only applied to the surfacing.

Even though the loss percentage figure is low, it is the loss of aggregate particles from the surface based on the whole mass of a 3kg core.

Extended Pavement life

1 application can extend remaining asphalt surface life by up to 50% re-application can reduce the number of mill and pave operations during the pavement life.

Lower Maintenance Costs

It is possible to achieve up to a 30% reduction in maintenance costs, and a 40% reduction in unplanned interventions. Independent evaluation has demonstrated a reduction of over 94% in the carbon footprint, when comparing the use of RHiNOPHALT® with conventional maintenance methods.

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