Our Solutions

Specialist Solutions

Inroads have a team of engineering specialists and a dedicated fleet of diverse equipment that allows them to deliver the best possible pavement solutions within client budget constraints. Our engineering design objective is to provide pavements that achieve maximum life expectancy and avert typical problems associated with spray sealing such as bleeding and stone loss.

To that end, Inroads can provide specialist advise on the condition of the road infrastructure, select appropriate and cost effective treatments, prioritise maintenance requirements, and provide concise project costings on the various different pavement solutions that are suitable for the project.

TREATMENT

DEFINITION

PRODUCT APPLIED

PROCESS

Initial Treatment:

Prime

(P)

Application of a primer on any

untreated surface (usually crushed rock) which acts as a blind between

the original base and the final

surfacing (either seal or asphalt)

Primer: bituminous material of low viscosity and low surface tension.

Either an emulsion primer or cutback bitumen (See EPA specifications)

1. Brooming the existing surface

2. Spraying

Primeseal

(PS)

Application of a primer binder on

any untreated surface followed by

the application of a layer of

aggregate. This is a temporary

treatment requiring a final

surfacing.

Primerbinder: more viscous than

Prime

Cutback bitumen

(See EPA specifications)

1. Brooming the existing surface

2. Spraying primerbinder

3. Spreading / covering with

aggregate

4. Rolling aggregate for embedment

5. Brooming/ removing the excess

aggregate

Emulsion Primerseal

(CRS)

Application of a primer binder on

any untreated surface followed by

the application of a layer of aggregate. This is a temporary

treatment requiring a final

surfacing.

Primerbinder: more viscous than

Prime.

Bitumen emulsion.

(See EPA specifications)

As above

Seal & Real:

Conventional Single/Single

Seal (CS)

Single/Double

Double/Double

Single application of binder covered

by a single application of aggregate.

Single application of binder covered

by a double application of

aggregate.

Double application of binder each

covered by a double application of

aggregate.

Hot bitumen and cutback if required

As above

As above with step 3 done twice

As above with steps 2 & 3 done

twice

High Strength Seal

(HSS)

Application of a modified binder to

resist heavier than normal traffic

loading such as that applied by

braking, accelerating or turning

vehicles.

Low to medium concentration of

PMB.

1. Brooming the existing surface
2. Spraying primerbinder
3. Spreading / covering with
aggregate
4. Rolling aggregate for embedment
5. Brooming/ removing the excess
aggregate

Strain Alleviating Membrane

(SAM)

Treatment used to absorb strains

and reduce reflection cracking.

Relatively large concentration of

rubber or polymer modifier.

As above

Inter Layer:

Strain Absorbing Membrane

Interlayer. (SAM)

A modified bituminous interlayer

applied immediately below the

wearing course to absorb reflective

cracking from the underlayers.

SAMI treatments are designed to

be overlaid with asphalt very

shortly after construction.

Highly modified binders, sprayed at

high rates of application.

As above

Geotextile Reinforced Seal

(GRS)

Treatment used to improve seal

performance as a waterproofing

membrane over cracked or weak pavements,

or as an asphalt

interlayer.

Hot bitumen and fibre rolls.

1. Brooming the existing surface

2. Spraying the binder

3. Covering with fibre roll

4. Rolling

5. Spraying the binder

6. Covering with aggregates

7. Rolling

8. Removing excess stone

Tack Coat

(TC)

Application of a binder as a thin film

to improve the adhesion between

layers of asphalt.

Emulsion

Hot bitumen

1. Brooming the existing surface

2. Spraying binder