hot bitumen seals
Generally the terms asphalt and bitumen are interchangeable when it comes to using them to describe a surface sealant; however, asphalt (or hot-mix as it is commonly referred to in this context) is made up of sand and stone aggregates, bound together by bitumen. The hot-mix is laid on a prepared base, which provides a stable foundation for the pavement.
Once laid, the hot-mix provides a smooth, flexible and durable finish which is ideal for road surfaces , driveways, car parks and other areas which may encounter a high volume of traffic, or drag caused by turning wheels.
An emulsion can be defined as a dispersion
of small droplets of one liquid in another.
Bitumen emulsions generally belong to
the oil-in-water type of emulsions where
bitumen is dispersed in water with the aid
of a small quantity of emulsifying agent.
The agent stabilises the bitumen particles
under normal conditions of storage.
Bitumen emulsions derive their main use
in road construction and maintenance
because of their safety, ease in handling
and excellent adhesion properties.
Dust Sealing has
very good soil stabilisation properties on unimproved roads producing a hard
and durable surface. It is also recommended for road edge sloping and gives
good protection against soil and sand erosion in rural and desert areas.
Dust Seal is best applied when the surface of the soil is slightly damp. If
binding soil is to be added, spreading should take place shortly afterwards.
Under normal conditions, best results are obtained when the road surface is
watered shortly before the spreading.