Construction Crew Micro Surfacing County Road 18 in North Lancaster Ontario

It's pretty cool how they can add a little bit of stuff on the top and have a nice new surface without having to re-do the whole road.

This may also be known as Bituminous surface treatment, chipseal, tar and chip, oil and stone, seal coat, sprayed seal, or surface dressing.

From their website:

Micro Surfacing systems are mixtures of a polymer-modified cationic emulsified asphalt, mineral aggregate, mineral filler, water and additives that are proportioned, mixed, and spread with a machine over a properly prepared surface.

Micro Surfacing systems are used to restore and preserve the surface characteristics of pavements.

Micro Surfacing may be designed to correct rutting, improve inadequate pavement cross sections, and enhance frictional properties of structurally sound polished pavements.

Micro Surfacing systems are low-cost preventive maintenance treatments that retard deterioration of the pavement, maintain or improve the functional condition of roadways, and extend the pavement’s service life when applied to suitable candidates.

The placement of a Micro Surfacing system on medium to high traffic roads offers a competitive alternative to traditional methods of restoring surface characteristics of roadways and extends the life of the pavement by 4 to 8 years.

See more:

https://www.millergroup.ca/services/p...

Asphalt emulsions are formed by the milling of raw asphalt into microscopic particles which are dispersed in water with the aid of a chemical emulsifying agent called a “surfactant” (sometimes referred to as “soap”). In such cases, the dispersed asphalt forms discrete droplets which are intrinsically insoluble in water.

The emulsion is said to be “stabilized” if the asphalt droplets remain well-dispersed such that phase separation does not occur. Stabilization is achieved through the use of surfactants, which consist of polar molecules comprised of a hydrophilic (water loving) “head” and hydrophobic (water avoiding) “tail.”

The tail of the surfactant molecule is attracted to the asphalt particles, forming a coating around each particle which consists of the hydrophilic heads of the emulsifying agent. The hydrophilic portions of these surfactants are very reactive with water, and aid in keeping the droplets dispersed and in suspension.


https://www.google.com/url?sa=t&sourc...

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